diff --git a/csharp/src/AddressBook/Addressbook.cs b/csharp/src/AddressBook/Addressbook.cs
index 931fdc1286..2e88db9a18 100644
--- a/csharp/src/AddressBook/Addressbook.cs
+++ b/csharp/src/AddressBook/Addressbook.cs
@@ -57,19 +57,23 @@ namespace Google.Protobuf.Examples.AddressBook {
     private static readonly pb::MessageParser<Person> _parser = new pb::MessageParser<Person>(() => new Person());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Person> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Examples.AddressBook.AddressbookReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Person() {
       OnConstruction();
     }
@@ -77,6 +81,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Person(Person other) : this() {
       name_ = other.name_;
       id_ = other.id_;
@@ -87,6 +92,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Person Clone() {
       return new Person(this);
     }
@@ -95,6 +101,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     public const int NameFieldNumber = 1;
     private string name_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -109,6 +116,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     /// Unique ID number for this person.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Id {
       get { return id_; }
       set {
@@ -120,6 +128,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     public const int EmailFieldNumber = 3;
     private string email_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Email {
       get { return email_; }
       set {
@@ -133,6 +142,7 @@ namespace Google.Protobuf.Examples.AddressBook {
         = pb::FieldCodec.ForMessage(34, global::Google.Protobuf.Examples.AddressBook.Person.Types.PhoneNumber.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Examples.AddressBook.Person.Types.PhoneNumber> phones_ = new pbc::RepeatedField<global::Google.Protobuf.Examples.AddressBook.Person.Types.PhoneNumber>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Examples.AddressBook.Person.Types.PhoneNumber> Phones {
       get { return phones_; }
     }
@@ -141,6 +151,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     public const int LastUpdatedFieldNumber = 5;
     private global::Google.Protobuf.WellKnownTypes.Timestamp lastUpdated_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Timestamp LastUpdated {
       get { return lastUpdated_; }
       set {
@@ -149,11 +160,13 @@ namespace Google.Protobuf.Examples.AddressBook {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Person);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Person other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -170,6 +183,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Name.Length != 0) hash ^= Name.GetHashCode();
@@ -184,11 +198,13 @@ namespace Google.Protobuf.Examples.AddressBook {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -218,6 +234,7 @@ namespace Google.Protobuf.Examples.AddressBook {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Name.Length != 0) {
         output.WriteRawTag(10);
@@ -243,6 +260,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Name.Length != 0) {
@@ -265,6 +283,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Person other) {
       if (other == null) {
         return;
@@ -289,6 +308,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -329,6 +349,7 @@ namespace Google.Protobuf.Examples.AddressBook {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -367,6 +388,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     #region Nested types
     /// <summary>Container for nested types declared in the Person message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum PhoneType {
         [pbr::OriginalName("MOBILE")] Mobile = 0,
@@ -382,19 +404,23 @@ namespace Google.Protobuf.Examples.AddressBook {
         private static readonly pb::MessageParser<PhoneNumber> _parser = new pb::MessageParser<PhoneNumber>(() => new PhoneNumber());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<PhoneNumber> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.Examples.AddressBook.Person.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public PhoneNumber() {
           OnConstruction();
         }
@@ -402,6 +428,7 @@ namespace Google.Protobuf.Examples.AddressBook {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public PhoneNumber(PhoneNumber other) : this() {
           number_ = other.number_;
           type_ = other.type_;
@@ -409,6 +436,7 @@ namespace Google.Protobuf.Examples.AddressBook {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public PhoneNumber Clone() {
           return new PhoneNumber(this);
         }
@@ -417,6 +445,7 @@ namespace Google.Protobuf.Examples.AddressBook {
         public const int NumberFieldNumber = 1;
         private string number_ = "";
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string Number {
           get { return number_; }
           set {
@@ -428,6 +457,7 @@ namespace Google.Protobuf.Examples.AddressBook {
         public const int TypeFieldNumber = 2;
         private global::Google.Protobuf.Examples.AddressBook.Person.Types.PhoneType type_ = global::Google.Protobuf.Examples.AddressBook.Person.Types.PhoneType.Mobile;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public global::Google.Protobuf.Examples.AddressBook.Person.Types.PhoneType Type {
           get { return type_; }
           set {
@@ -436,11 +466,13 @@ namespace Google.Protobuf.Examples.AddressBook {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as PhoneNumber);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(PhoneNumber other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -454,6 +486,7 @@ namespace Google.Protobuf.Examples.AddressBook {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (Number.Length != 0) hash ^= Number.GetHashCode();
@@ -465,11 +498,13 @@ namespace Google.Protobuf.Examples.AddressBook {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -490,6 +525,7 @@ namespace Google.Protobuf.Examples.AddressBook {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (Number.Length != 0) {
             output.WriteRawTag(10);
@@ -506,6 +542,7 @@ namespace Google.Protobuf.Examples.AddressBook {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (Number.Length != 0) {
@@ -521,6 +558,7 @@ namespace Google.Protobuf.Examples.AddressBook {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(PhoneNumber other) {
           if (other == null) {
             return;
@@ -535,6 +573,7 @@ namespace Google.Protobuf.Examples.AddressBook {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -560,6 +599,7 @@ namespace Google.Protobuf.Examples.AddressBook {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -598,19 +638,23 @@ namespace Google.Protobuf.Examples.AddressBook {
     private static readonly pb::MessageParser<AddressBook> _parser = new pb::MessageParser<AddressBook>(() => new AddressBook());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<AddressBook> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Examples.AddressBook.AddressbookReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public AddressBook() {
       OnConstruction();
     }
@@ -618,12 +662,14 @@ namespace Google.Protobuf.Examples.AddressBook {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public AddressBook(AddressBook other) : this() {
       people_ = other.people_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public AddressBook Clone() {
       return new AddressBook(this);
     }
@@ -634,16 +680,19 @@ namespace Google.Protobuf.Examples.AddressBook {
         = pb::FieldCodec.ForMessage(10, global::Google.Protobuf.Examples.AddressBook.Person.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Examples.AddressBook.Person> people_ = new pbc::RepeatedField<global::Google.Protobuf.Examples.AddressBook.Person>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Examples.AddressBook.Person> People {
       get { return people_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as AddressBook);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(AddressBook other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -656,6 +705,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= people_.GetHashCode();
@@ -666,11 +716,13 @@ namespace Google.Protobuf.Examples.AddressBook {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -684,6 +736,7 @@ namespace Google.Protobuf.Examples.AddressBook {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       people_.WriteTo(ref output, _repeated_people_codec);
       if (_unknownFields != null) {
@@ -693,6 +746,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += people_.CalculateSize(_repeated_people_codec);
@@ -703,6 +757,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(AddressBook other) {
       if (other == null) {
         return;
@@ -712,6 +767,7 @@ namespace Google.Protobuf.Examples.AddressBook {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -733,6 +789,7 @@ namespace Google.Protobuf.Examples.AddressBook {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Benchmarks/BenchmarkMessage1Proto3.cs b/csharp/src/Google.Protobuf.Benchmarks/BenchmarkMessage1Proto3.cs
index 027da02a10..412440417c 100644
--- a/csharp/src/Google.Protobuf.Benchmarks/BenchmarkMessage1Proto3.cs
+++ b/csharp/src/Google.Protobuf.Benchmarks/BenchmarkMessage1Proto3.cs
@@ -72,19 +72,23 @@ namespace Benchmarks.Proto3 {
     private static readonly pb::MessageParser<GoogleMessage1> _parser = new pb::MessageParser<GoogleMessage1>(() => new GoogleMessage1());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<GoogleMessage1> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Benchmarks.Proto3.BenchmarkMessage1Proto3Reflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public GoogleMessage1() {
       OnConstruction();
     }
@@ -92,6 +96,7 @@ namespace Benchmarks.Proto3 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public GoogleMessage1(GoogleMessage1 other) : this() {
       field1_ = other.field1_;
       field9_ = other.field9_;
@@ -138,6 +143,7 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public GoogleMessage1 Clone() {
       return new GoogleMessage1(this);
     }
@@ -146,6 +152,7 @@ namespace Benchmarks.Proto3 {
     public const int Field1FieldNumber = 1;
     private string field1_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field1 {
       get { return field1_; }
       set {
@@ -157,6 +164,7 @@ namespace Benchmarks.Proto3 {
     public const int Field9FieldNumber = 9;
     private string field9_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field9 {
       get { return field9_; }
       set {
@@ -168,6 +176,7 @@ namespace Benchmarks.Proto3 {
     public const int Field18FieldNumber = 18;
     private string field18_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field18 {
       get { return field18_; }
       set {
@@ -179,6 +188,7 @@ namespace Benchmarks.Proto3 {
     public const int Field80FieldNumber = 80;
     private bool field80_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field80 {
       get { return field80_; }
       set {
@@ -190,6 +200,7 @@ namespace Benchmarks.Proto3 {
     public const int Field81FieldNumber = 81;
     private bool field81_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field81 {
       get { return field81_; }
       set {
@@ -201,6 +212,7 @@ namespace Benchmarks.Proto3 {
     public const int Field2FieldNumber = 2;
     private int field2_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field2 {
       get { return field2_; }
       set {
@@ -212,6 +224,7 @@ namespace Benchmarks.Proto3 {
     public const int Field3FieldNumber = 3;
     private int field3_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field3 {
       get { return field3_; }
       set {
@@ -223,6 +236,7 @@ namespace Benchmarks.Proto3 {
     public const int Field280FieldNumber = 280;
     private int field280_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field280 {
       get { return field280_; }
       set {
@@ -234,6 +248,7 @@ namespace Benchmarks.Proto3 {
     public const int Field6FieldNumber = 6;
     private int field6_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field6 {
       get { return field6_; }
       set {
@@ -245,6 +260,7 @@ namespace Benchmarks.Proto3 {
     public const int Field22FieldNumber = 22;
     private long field22_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Field22 {
       get { return field22_; }
       set {
@@ -256,6 +272,7 @@ namespace Benchmarks.Proto3 {
     public const int Field4FieldNumber = 4;
     private string field4_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field4 {
       get { return field4_; }
       set {
@@ -269,6 +286,7 @@ namespace Benchmarks.Proto3 {
         = pb::FieldCodec.ForFixed64(42);
     private readonly pbc::RepeatedField<ulong> field5_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> Field5 {
       get { return field5_; }
     }
@@ -277,6 +295,7 @@ namespace Benchmarks.Proto3 {
     public const int Field59FieldNumber = 59;
     private bool field59_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field59 {
       get { return field59_; }
       set {
@@ -288,6 +307,7 @@ namespace Benchmarks.Proto3 {
     public const int Field7FieldNumber = 7;
     private string field7_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field7 {
       get { return field7_; }
       set {
@@ -299,6 +319,7 @@ namespace Benchmarks.Proto3 {
     public const int Field16FieldNumber = 16;
     private int field16_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field16 {
       get { return field16_; }
       set {
@@ -310,6 +331,7 @@ namespace Benchmarks.Proto3 {
     public const int Field130FieldNumber = 130;
     private int field130_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field130 {
       get { return field130_; }
       set {
@@ -321,6 +343,7 @@ namespace Benchmarks.Proto3 {
     public const int Field12FieldNumber = 12;
     private bool field12_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field12 {
       get { return field12_; }
       set {
@@ -332,6 +355,7 @@ namespace Benchmarks.Proto3 {
     public const int Field17FieldNumber = 17;
     private bool field17_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field17 {
       get { return field17_; }
       set {
@@ -343,6 +367,7 @@ namespace Benchmarks.Proto3 {
     public const int Field13FieldNumber = 13;
     private bool field13_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field13 {
       get { return field13_; }
       set {
@@ -354,6 +379,7 @@ namespace Benchmarks.Proto3 {
     public const int Field14FieldNumber = 14;
     private bool field14_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field14 {
       get { return field14_; }
       set {
@@ -365,6 +391,7 @@ namespace Benchmarks.Proto3 {
     public const int Field104FieldNumber = 104;
     private int field104_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field104 {
       get { return field104_; }
       set {
@@ -376,6 +403,7 @@ namespace Benchmarks.Proto3 {
     public const int Field100FieldNumber = 100;
     private int field100_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field100 {
       get { return field100_; }
       set {
@@ -387,6 +415,7 @@ namespace Benchmarks.Proto3 {
     public const int Field101FieldNumber = 101;
     private int field101_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field101 {
       get { return field101_; }
       set {
@@ -398,6 +427,7 @@ namespace Benchmarks.Proto3 {
     public const int Field102FieldNumber = 102;
     private string field102_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field102 {
       get { return field102_; }
       set {
@@ -409,6 +439,7 @@ namespace Benchmarks.Proto3 {
     public const int Field103FieldNumber = 103;
     private string field103_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field103 {
       get { return field103_; }
       set {
@@ -420,6 +451,7 @@ namespace Benchmarks.Proto3 {
     public const int Field29FieldNumber = 29;
     private int field29_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field29 {
       get { return field29_; }
       set {
@@ -431,6 +463,7 @@ namespace Benchmarks.Proto3 {
     public const int Field30FieldNumber = 30;
     private bool field30_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field30 {
       get { return field30_; }
       set {
@@ -442,6 +475,7 @@ namespace Benchmarks.Proto3 {
     public const int Field60FieldNumber = 60;
     private int field60_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field60 {
       get { return field60_; }
       set {
@@ -453,6 +487,7 @@ namespace Benchmarks.Proto3 {
     public const int Field271FieldNumber = 271;
     private int field271_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field271 {
       get { return field271_; }
       set {
@@ -464,6 +499,7 @@ namespace Benchmarks.Proto3 {
     public const int Field272FieldNumber = 272;
     private int field272_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field272 {
       get { return field272_; }
       set {
@@ -475,6 +511,7 @@ namespace Benchmarks.Proto3 {
     public const int Field150FieldNumber = 150;
     private int field150_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field150 {
       get { return field150_; }
       set {
@@ -486,6 +523,7 @@ namespace Benchmarks.Proto3 {
     public const int Field23FieldNumber = 23;
     private int field23_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field23 {
       get { return field23_; }
       set {
@@ -497,6 +535,7 @@ namespace Benchmarks.Proto3 {
     public const int Field24FieldNumber = 24;
     private bool field24_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field24 {
       get { return field24_; }
       set {
@@ -508,6 +547,7 @@ namespace Benchmarks.Proto3 {
     public const int Field25FieldNumber = 25;
     private int field25_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field25 {
       get { return field25_; }
       set {
@@ -519,6 +559,7 @@ namespace Benchmarks.Proto3 {
     public const int Field15FieldNumber = 15;
     private global::Benchmarks.Proto3.GoogleMessage1SubMessage field15_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Benchmarks.Proto3.GoogleMessage1SubMessage Field15 {
       get { return field15_; }
       set {
@@ -530,6 +571,7 @@ namespace Benchmarks.Proto3 {
     public const int Field78FieldNumber = 78;
     private bool field78_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field78 {
       get { return field78_; }
       set {
@@ -541,6 +583,7 @@ namespace Benchmarks.Proto3 {
     public const int Field67FieldNumber = 67;
     private int field67_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field67 {
       get { return field67_; }
       set {
@@ -552,6 +595,7 @@ namespace Benchmarks.Proto3 {
     public const int Field68FieldNumber = 68;
     private int field68_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field68 {
       get { return field68_; }
       set {
@@ -563,6 +607,7 @@ namespace Benchmarks.Proto3 {
     public const int Field128FieldNumber = 128;
     private int field128_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field128 {
       get { return field128_; }
       set {
@@ -574,6 +619,7 @@ namespace Benchmarks.Proto3 {
     public const int Field129FieldNumber = 129;
     private string field129_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field129 {
       get { return field129_; }
       set {
@@ -585,6 +631,7 @@ namespace Benchmarks.Proto3 {
     public const int Field131FieldNumber = 131;
     private int field131_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field131 {
       get { return field131_; }
       set {
@@ -593,11 +640,13 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as GoogleMessage1);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(GoogleMessage1 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -650,6 +699,7 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Field1.Length != 0) hash ^= Field1.GetHashCode();
@@ -700,11 +750,13 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -878,6 +930,7 @@ namespace Benchmarks.Proto3 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Field1.Length != 0) {
         output.WriteRawTag(10);
@@ -1047,6 +1100,7 @@ namespace Benchmarks.Proto3 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Field1.Length != 0) {
@@ -1177,6 +1231,7 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(GoogleMessage1 other) {
       if (other == null) {
         return;
@@ -1309,6 +1364,7 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1494,6 +1550,7 @@ namespace Benchmarks.Proto3 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1684,19 +1741,23 @@ namespace Benchmarks.Proto3 {
     private static readonly pb::MessageParser<GoogleMessage1SubMessage> _parser = new pb::MessageParser<GoogleMessage1SubMessage>(() => new GoogleMessage1SubMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<GoogleMessage1SubMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Benchmarks.Proto3.BenchmarkMessage1Proto3Reflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public GoogleMessage1SubMessage() {
       OnConstruction();
     }
@@ -1704,6 +1765,7 @@ namespace Benchmarks.Proto3 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public GoogleMessage1SubMessage(GoogleMessage1SubMessage other) : this() {
       field1_ = other.field1_;
       field2_ = other.field2_;
@@ -1729,6 +1791,7 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public GoogleMessage1SubMessage Clone() {
       return new GoogleMessage1SubMessage(this);
     }
@@ -1737,6 +1800,7 @@ namespace Benchmarks.Proto3 {
     public const int Field1FieldNumber = 1;
     private int field1_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field1 {
       get { return field1_; }
       set {
@@ -1748,6 +1812,7 @@ namespace Benchmarks.Proto3 {
     public const int Field2FieldNumber = 2;
     private int field2_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field2 {
       get { return field2_; }
       set {
@@ -1759,6 +1824,7 @@ namespace Benchmarks.Proto3 {
     public const int Field3FieldNumber = 3;
     private int field3_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field3 {
       get { return field3_; }
       set {
@@ -1770,6 +1836,7 @@ namespace Benchmarks.Proto3 {
     public const int Field15FieldNumber = 15;
     private string field15_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field15 {
       get { return field15_; }
       set {
@@ -1781,6 +1848,7 @@ namespace Benchmarks.Proto3 {
     public const int Field12FieldNumber = 12;
     private bool field12_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field12 {
       get { return field12_; }
       set {
@@ -1792,6 +1860,7 @@ namespace Benchmarks.Proto3 {
     public const int Field13FieldNumber = 13;
     private long field13_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Field13 {
       get { return field13_; }
       set {
@@ -1803,6 +1872,7 @@ namespace Benchmarks.Proto3 {
     public const int Field14FieldNumber = 14;
     private long field14_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Field14 {
       get { return field14_; }
       set {
@@ -1814,6 +1884,7 @@ namespace Benchmarks.Proto3 {
     public const int Field16FieldNumber = 16;
     private int field16_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field16 {
       get { return field16_; }
       set {
@@ -1825,6 +1896,7 @@ namespace Benchmarks.Proto3 {
     public const int Field19FieldNumber = 19;
     private int field19_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field19 {
       get { return field19_; }
       set {
@@ -1836,6 +1908,7 @@ namespace Benchmarks.Proto3 {
     public const int Field20FieldNumber = 20;
     private bool field20_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field20 {
       get { return field20_; }
       set {
@@ -1847,6 +1920,7 @@ namespace Benchmarks.Proto3 {
     public const int Field28FieldNumber = 28;
     private bool field28_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field28 {
       get { return field28_; }
       set {
@@ -1858,6 +1932,7 @@ namespace Benchmarks.Proto3 {
     public const int Field21FieldNumber = 21;
     private ulong field21_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong Field21 {
       get { return field21_; }
       set {
@@ -1869,6 +1944,7 @@ namespace Benchmarks.Proto3 {
     public const int Field22FieldNumber = 22;
     private int field22_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field22 {
       get { return field22_; }
       set {
@@ -1880,6 +1956,7 @@ namespace Benchmarks.Proto3 {
     public const int Field23FieldNumber = 23;
     private bool field23_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field23 {
       get { return field23_; }
       set {
@@ -1891,6 +1968,7 @@ namespace Benchmarks.Proto3 {
     public const int Field206FieldNumber = 206;
     private bool field206_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Field206 {
       get { return field206_; }
       set {
@@ -1902,6 +1980,7 @@ namespace Benchmarks.Proto3 {
     public const int Field203FieldNumber = 203;
     private uint field203_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint Field203 {
       get { return field203_; }
       set {
@@ -1913,6 +1992,7 @@ namespace Benchmarks.Proto3 {
     public const int Field204FieldNumber = 204;
     private int field204_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field204 {
       get { return field204_; }
       set {
@@ -1924,6 +2004,7 @@ namespace Benchmarks.Proto3 {
     public const int Field205FieldNumber = 205;
     private string field205_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field205 {
       get { return field205_; }
       set {
@@ -1935,6 +2016,7 @@ namespace Benchmarks.Proto3 {
     public const int Field207FieldNumber = 207;
     private ulong field207_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong Field207 {
       get { return field207_; }
       set {
@@ -1946,6 +2028,7 @@ namespace Benchmarks.Proto3 {
     public const int Field300FieldNumber = 300;
     private ulong field300_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong Field300 {
       get { return field300_; }
       set {
@@ -1954,11 +2037,13 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as GoogleMessage1SubMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(GoogleMessage1SubMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1990,6 +2075,7 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Field1 != 0) hash ^= Field1.GetHashCode();
@@ -2019,11 +2105,13 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2116,6 +2204,7 @@ namespace Benchmarks.Proto3 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Field1 != 0) {
         output.WriteRawTag(8);
@@ -2204,6 +2293,7 @@ namespace Benchmarks.Proto3 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Field1 != 0) {
@@ -2273,6 +2363,7 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(GoogleMessage1SubMessage other) {
       if (other == null) {
         return;
@@ -2341,6 +2432,7 @@ namespace Benchmarks.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2438,6 +2530,7 @@ namespace Benchmarks.Proto3 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Benchmarks/Benchmarks.cs b/csharp/src/Google.Protobuf.Benchmarks/Benchmarks.cs
index e2578f367f..faa37b0508 100644
--- a/csharp/src/Google.Protobuf.Benchmarks/Benchmarks.cs
+++ b/csharp/src/Google.Protobuf.Benchmarks/Benchmarks.cs
@@ -46,19 +46,23 @@ namespace Benchmarks {
     private static readonly pb::MessageParser<BenchmarkDataset> _parser = new pb::MessageParser<BenchmarkDataset>(() => new BenchmarkDataset());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<BenchmarkDataset> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Benchmarks.BenchmarksReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BenchmarkDataset() {
       OnConstruction();
     }
@@ -66,6 +70,7 @@ namespace Benchmarks {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BenchmarkDataset(BenchmarkDataset other) : this() {
       name_ = other.name_;
       messageName_ = other.messageName_;
@@ -74,6 +79,7 @@ namespace Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BenchmarkDataset Clone() {
       return new BenchmarkDataset(this);
     }
@@ -86,6 +92,7 @@ namespace Benchmarks {
     /// Should only contain word characters: [a-zA-Z0-9_]
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -106,6 +113,7 @@ namespace Benchmarks {
     /// in those files.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string MessageName {
       get { return messageName_; }
       set {
@@ -134,16 +142,19 @@ namespace Benchmarks {
     /// good branch prediction performance.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<pb::ByteString> Payload {
       get { return payload_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as BenchmarkDataset);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(BenchmarkDataset other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -158,6 +169,7 @@ namespace Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Name.Length != 0) hash ^= Name.GetHashCode();
@@ -170,11 +182,13 @@ namespace Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -196,6 +210,7 @@ namespace Benchmarks {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Name.Length != 0) {
         output.WriteRawTag(10);
@@ -213,6 +228,7 @@ namespace Benchmarks {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Name.Length != 0) {
@@ -229,6 +245,7 @@ namespace Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(BenchmarkDataset other) {
       if (other == null) {
         return;
@@ -244,6 +261,7 @@ namespace Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -273,6 +291,7 @@ namespace Benchmarks {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Benchmarks/WrapperBenchmarkMessages.cs b/csharp/src/Google.Protobuf.Benchmarks/WrapperBenchmarkMessages.cs
index 9db92447ee..df427e8023 100644
--- a/csharp/src/Google.Protobuf.Benchmarks/WrapperBenchmarkMessages.cs
+++ b/csharp/src/Google.Protobuf.Benchmarks/WrapperBenchmarkMessages.cs
@@ -245,19 +245,23 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::MessageParser<ManyWrapperFieldsMessage> _parser = new pb::MessageParser<ManyWrapperFieldsMessage>(() => new ManyWrapperFieldsMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ManyWrapperFieldsMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Benchmarks.WrapperBenchmarkMessagesReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ManyWrapperFieldsMessage() {
       OnConstruction();
     }
@@ -265,6 +269,7 @@ namespace Google.Protobuf.Benchmarks {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ManyWrapperFieldsMessage(ManyWrapperFieldsMessage other) : this() {
       DoubleField95 = other.DoubleField95;
       DoubleField1 = other.DoubleField1;
@@ -381,6 +386,7 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ManyWrapperFieldsMessage Clone() {
       return new ManyWrapperFieldsMessage(this);
     }
@@ -390,6 +396,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField95_codec = pb::FieldCodec.ForStructWrapper<double>(762);
     private double? doubleField95_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField95 {
       get { return doubleField95_; }
       set {
@@ -403,6 +410,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField1_codec = pb::FieldCodec.ForStructWrapper<double>(10);
     private double? doubleField1_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField1 {
       get { return doubleField1_; }
       set {
@@ -416,6 +424,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField79_codec = pb::FieldCodec.ForStructWrapper<double>(634);
     private double? doubleField79_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField79 {
       get { return doubleField79_; }
       set {
@@ -429,6 +438,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field2_codec = pb::FieldCodec.ForStructWrapper<long>(18);
     private long? int64Field2_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field2 {
       get { return int64Field2_; }
       set {
@@ -442,6 +452,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField96_codec = pb::FieldCodec.ForStructWrapper<double>(770);
     private double? doubleField96_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField96 {
       get { return doubleField96_; }
       set {
@@ -455,6 +466,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field3_codec = pb::FieldCodec.ForStructWrapper<long>(26);
     private long? int64Field3_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field3 {
       get { return int64Field3_; }
       set {
@@ -468,6 +480,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field4_codec = pb::FieldCodec.ForStructWrapper<long>(34);
     private long? int64Field4_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field4 {
       get { return int64Field4_; }
       set {
@@ -481,6 +494,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField97_codec = pb::FieldCodec.ForStructWrapper<double>(778);
     private double? doubleField97_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField97 {
       get { return doubleField97_; }
       set {
@@ -494,6 +508,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField65_codec = pb::FieldCodec.ForStructWrapper<double>(522);
     private double? doubleField65_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField65 {
       get { return doubleField65_; }
       set {
@@ -507,6 +522,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField66_codec = pb::FieldCodec.ForStructWrapper<double>(530);
     private double? doubleField66_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField66 {
       get { return doubleField66_; }
       set {
@@ -520,6 +536,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField7_codec = pb::FieldCodec.ForStructWrapper<double>(58);
     private double? doubleField7_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField7 {
       get { return doubleField7_; }
       set {
@@ -533,6 +550,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField62_codec = pb::FieldCodec.ForStructWrapper<double>(498);
     private double? doubleField62_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField62 {
       get { return doubleField62_; }
       set {
@@ -546,6 +564,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField118_codec = pb::FieldCodec.ForStructWrapper<double>(946);
     private double? doubleField118_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField118 {
       get { return doubleField118_; }
       set {
@@ -559,6 +578,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField119_codec = pb::FieldCodec.ForStructWrapper<double>(954);
     private double? doubleField119_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField119 {
       get { return doubleField119_; }
       set {
@@ -572,6 +592,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField67_codec = pb::FieldCodec.ForStructWrapper<double>(538);
     private double? doubleField67_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField67 {
       get { return doubleField67_; }
       set {
@@ -585,6 +606,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField120_codec = pb::FieldCodec.ForStructWrapper<double>(962);
     private double? doubleField120_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField120 {
       get { return doubleField120_; }
       set {
@@ -598,6 +620,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField121_codec = pb::FieldCodec.ForStructWrapper<double>(970);
     private double? doubleField121_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField121 {
       get { return doubleField121_; }
       set {
@@ -611,6 +634,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField122_codec = pb::FieldCodec.ForStructWrapper<double>(978);
     private double? doubleField122_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField122 {
       get { return doubleField122_; }
       set {
@@ -624,6 +648,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField123_codec = pb::FieldCodec.ForStructWrapper<double>(986);
     private double? doubleField123_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField123 {
       get { return doubleField123_; }
       set {
@@ -637,6 +662,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField124_codec = pb::FieldCodec.ForStructWrapper<double>(994);
     private double? doubleField124_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField124 {
       get { return doubleField124_; }
       set {
@@ -650,6 +676,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField8_codec = pb::FieldCodec.ForStructWrapper<double>(66);
     private double? doubleField8_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField8 {
       get { return doubleField8_; }
       set {
@@ -663,6 +690,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField9_codec = pb::FieldCodec.ForStructWrapper<double>(74);
     private double? doubleField9_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField9 {
       get { return doubleField9_; }
       set {
@@ -676,6 +704,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField98_codec = pb::FieldCodec.ForStructWrapper<double>(786);
     private double? doubleField98_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField98 {
       get { return doubleField98_; }
       set {
@@ -689,6 +718,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField10_codec = pb::FieldCodec.ForStructWrapper<double>(82);
     private double? doubleField10_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField10 {
       get { return doubleField10_; }
       set {
@@ -702,6 +732,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField11_codec = pb::FieldCodec.ForStructWrapper<double>(90);
     private double? doubleField11_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField11 {
       get { return doubleField11_; }
       set {
@@ -715,6 +746,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField99_codec = pb::FieldCodec.ForStructWrapper<double>(794);
     private double? doubleField99_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField99 {
       get { return doubleField99_; }
       set {
@@ -728,6 +760,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField84_codec = pb::FieldCodec.ForStructWrapper<double>(674);
     private double? doubleField84_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField84 {
       get { return doubleField84_; }
       set {
@@ -741,6 +774,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField14_codec = pb::FieldCodec.ForStructWrapper<double>(114);
     private double? doubleField14_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField14 {
       get { return doubleField14_; }
       set {
@@ -754,6 +788,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField77_codec = pb::FieldCodec.ForStructWrapper<double>(618);
     private double? doubleField77_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField77 {
       get { return doubleField77_; }
       set {
@@ -767,6 +802,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField15_codec = pb::FieldCodec.ForStructWrapper<double>(122);
     private double? doubleField15_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField15 {
       get { return doubleField15_; }
       set {
@@ -780,6 +816,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field19_codec = pb::FieldCodec.ForStructWrapper<long>(154);
     private long? int64Field19_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field19 {
       get { return int64Field19_; }
       set {
@@ -793,6 +830,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field115_codec = pb::FieldCodec.ForStructWrapper<long>(922);
     private long? int64Field115_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field115 {
       get { return int64Field115_; }
       set {
@@ -806,6 +844,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField116_codec = pb::FieldCodec.ForStructWrapper<double>(930);
     private double? doubleField116_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField116 {
       get { return doubleField116_; }
       set {
@@ -819,6 +858,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field117_codec = pb::FieldCodec.ForStructWrapper<long>(938);
     private long? int64Field117_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field117 {
       get { return int64Field117_; }
       set {
@@ -832,6 +872,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField20_codec = pb::FieldCodec.ForStructWrapper<double>(162);
     private double? doubleField20_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField20 {
       get { return doubleField20_; }
       set {
@@ -845,6 +886,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField21_codec = pb::FieldCodec.ForStructWrapper<double>(170);
     private double? doubleField21_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField21 {
       get { return doubleField21_; }
       set {
@@ -858,6 +900,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<string> _single_stringField73_codec = pb::FieldCodec.ForClassWrapper<string>(586);
     private string stringField73_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringField73 {
       get { return stringField73_; }
       set {
@@ -871,6 +914,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<string> _single_stringField74_codec = pb::FieldCodec.ForClassWrapper<string>(594);
     private string stringField74_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringField74 {
       get { return stringField74_; }
       set {
@@ -884,6 +928,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField22_codec = pb::FieldCodec.ForStructWrapper<double>(178);
     private double? doubleField22_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField22 {
       get { return doubleField22_; }
       set {
@@ -897,6 +942,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField69_codec = pb::FieldCodec.ForStructWrapper<double>(554);
     private double? doubleField69_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField69 {
       get { return doubleField69_; }
       set {
@@ -910,6 +956,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField70_codec = pb::FieldCodec.ForStructWrapper<double>(562);
     private double? doubleField70_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField70 {
       get { return doubleField70_; }
       set {
@@ -923,6 +970,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField71_codec = pb::FieldCodec.ForStructWrapper<double>(570);
     private double? doubleField71_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField71 {
       get { return doubleField71_; }
       set {
@@ -936,6 +984,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField72_codec = pb::FieldCodec.ForStructWrapper<double>(578);
     private double? doubleField72_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField72 {
       get { return doubleField72_; }
       set {
@@ -949,6 +998,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField25_codec = pb::FieldCodec.ForStructWrapper<double>(202);
     private double? doubleField25_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField25 {
       get { return doubleField25_; }
       set {
@@ -962,6 +1012,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field26_codec = pb::FieldCodec.ForStructWrapper<long>(210);
     private long? int64Field26_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field26 {
       get { return int64Field26_; }
       set {
@@ -975,6 +1026,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField68_codec = pb::FieldCodec.ForStructWrapper<double>(546);
     private double? doubleField68_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField68 {
       get { return doubleField68_; }
       set {
@@ -988,6 +1040,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField28_codec = pb::FieldCodec.ForStructWrapper<double>(226);
     private double? doubleField28_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField28 {
       get { return doubleField28_; }
       set {
@@ -1001,6 +1054,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField106_codec = pb::FieldCodec.ForStructWrapper<double>(850);
     private double? doubleField106_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField106 {
       get { return doubleField106_; }
       set {
@@ -1014,6 +1068,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField29_codec = pb::FieldCodec.ForStructWrapper<double>(234);
     private double? doubleField29_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField29 {
       get { return doubleField29_; }
       set {
@@ -1027,6 +1082,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField30_codec = pb::FieldCodec.ForStructWrapper<double>(242);
     private double? doubleField30_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField30 {
       get { return doubleField30_; }
       set {
@@ -1040,6 +1096,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField101_codec = pb::FieldCodec.ForStructWrapper<double>(810);
     private double? doubleField101_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField101 {
       get { return doubleField101_; }
       set {
@@ -1053,6 +1110,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField102_codec = pb::FieldCodec.ForStructWrapper<double>(818);
     private double? doubleField102_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField102 {
       get { return doubleField102_; }
       set {
@@ -1066,6 +1124,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField103_codec = pb::FieldCodec.ForStructWrapper<double>(826);
     private double? doubleField103_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField103 {
       get { return doubleField103_; }
       set {
@@ -1079,6 +1138,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField104_codec = pb::FieldCodec.ForStructWrapper<double>(834);
     private double? doubleField104_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField104 {
       get { return doubleField104_; }
       set {
@@ -1092,6 +1152,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField105_codec = pb::FieldCodec.ForStructWrapper<double>(842);
     private double? doubleField105_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField105 {
       get { return doubleField105_; }
       set {
@@ -1105,6 +1166,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField31_codec = pb::FieldCodec.ForStructWrapper<double>(250);
     private double? doubleField31_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField31 {
       get { return doubleField31_; }
       set {
@@ -1118,6 +1180,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field32_codec = pb::FieldCodec.ForStructWrapper<long>(258);
     private long? int64Field32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field32 {
       get { return int64Field32_; }
       set {
@@ -1131,6 +1194,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField75_codec = pb::FieldCodec.ForStructWrapper<double>(602);
     private double? doubleField75_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField75 {
       get { return doubleField75_; }
       set {
@@ -1144,6 +1208,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField129_codec = pb::FieldCodec.ForStructWrapper<double>(1034);
     private double? doubleField129_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField129 {
       get { return doubleField129_; }
       set {
@@ -1156,6 +1221,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int EnumField80FieldNumber = 80;
     private int enumField80_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int EnumField80 {
       get { return enumField80_; }
       set {
@@ -1167,6 +1233,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int EnumField81FieldNumber = 81;
     private int enumField81_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int EnumField81 {
       get { return enumField81_; }
       set {
@@ -1179,6 +1246,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field82_codec = pb::FieldCodec.ForStructWrapper<long>(658);
     private long? int64Field82_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field82 {
       get { return int64Field82_; }
       set {
@@ -1191,6 +1259,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int EnumField83FieldNumber = 83;
     private int enumField83_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int EnumField83 {
       get { return enumField83_; }
       set {
@@ -1203,6 +1272,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field85_codec = pb::FieldCodec.ForStructWrapper<long>(682);
     private long? int64Field85_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field85 {
       get { return int64Field85_; }
       set {
@@ -1216,6 +1286,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field86_codec = pb::FieldCodec.ForStructWrapper<long>(690);
     private long? int64Field86_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field86 {
       get { return int64Field86_; }
       set {
@@ -1229,6 +1300,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field87_codec = pb::FieldCodec.ForStructWrapper<long>(698);
     private long? int64Field87_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field87 {
       get { return int64Field87_; }
       set {
@@ -1242,6 +1314,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field125_codec = pb::FieldCodec.ForStructWrapper<long>(1002);
     private long? int64Field125_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field125 {
       get { return int64Field125_; }
       set {
@@ -1255,6 +1328,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field37_codec = pb::FieldCodec.ForStructWrapper<long>(298);
     private long? int64Field37_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field37 {
       get { return int64Field37_; }
       set {
@@ -1268,6 +1342,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField38_codec = pb::FieldCodec.ForStructWrapper<double>(306);
     private double? doubleField38_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField38 {
       get { return doubleField38_; }
       set {
@@ -1281,6 +1356,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_interactions_codec = pb::FieldCodec.ForStructWrapper<long>(314);
     private long? interactions_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Interactions {
       get { return interactions_; }
       set {
@@ -1295,6 +1371,7 @@ namespace Google.Protobuf.Benchmarks {
         = pb::FieldCodec.ForInt32(802);
     private readonly pbc::RepeatedField<int> repeatedIntField100_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedIntField100 {
       get { return repeatedIntField100_; }
     }
@@ -1304,6 +1381,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField40_codec = pb::FieldCodec.ForStructWrapper<double>(322);
     private double? doubleField40_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField40 {
       get { return doubleField40_; }
       set {
@@ -1317,6 +1395,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field41_codec = pb::FieldCodec.ForStructWrapper<long>(330);
     private long? int64Field41_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field41 {
       get { return int64Field41_; }
       set {
@@ -1330,6 +1409,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field126_codec = pb::FieldCodec.ForStructWrapper<long>(1010);
     private long? int64Field126_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field126 {
       get { return int64Field126_; }
       set {
@@ -1343,6 +1423,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field127_codec = pb::FieldCodec.ForStructWrapper<long>(1018);
     private long? int64Field127_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field127 {
       get { return int64Field127_; }
       set {
@@ -1356,6 +1437,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField128_codec = pb::FieldCodec.ForStructWrapper<double>(1026);
     private double? doubleField128_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField128 {
       get { return doubleField128_; }
       set {
@@ -1369,6 +1451,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField109_codec = pb::FieldCodec.ForStructWrapper<double>(874);
     private double? doubleField109_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField109 {
       get { return doubleField109_; }
       set {
@@ -1382,6 +1465,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field110_codec = pb::FieldCodec.ForStructWrapper<long>(882);
     private long? int64Field110_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field110 {
       get { return int64Field110_; }
       set {
@@ -1395,6 +1479,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField111_codec = pb::FieldCodec.ForStructWrapper<double>(890);
     private double? doubleField111_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField111 {
       get { return doubleField111_; }
       set {
@@ -1408,6 +1493,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field112_codec = pb::FieldCodec.ForStructWrapper<long>(898);
     private long? int64Field112_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field112 {
       get { return int64Field112_; }
       set {
@@ -1421,6 +1507,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField113_codec = pb::FieldCodec.ForStructWrapper<double>(906);
     private double? doubleField113_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField113 {
       get { return doubleField113_; }
       set {
@@ -1434,6 +1521,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field114_codec = pb::FieldCodec.ForStructWrapper<long>(914);
     private long? int64Field114_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field114 {
       get { return int64Field114_; }
       set {
@@ -1447,6 +1535,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField42_codec = pb::FieldCodec.ForStructWrapper<double>(338);
     private double? doubleField42_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField42 {
       get { return doubleField42_; }
       set {
@@ -1460,6 +1549,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field43_codec = pb::FieldCodec.ForStructWrapper<long>(346);
     private long? int64Field43_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field43 {
       get { return int64Field43_; }
       set {
@@ -1473,6 +1563,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field44_codec = pb::FieldCodec.ForStructWrapper<long>(354);
     private long? int64Field44_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field44 {
       get { return int64Field44_; }
       set {
@@ -1486,6 +1577,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField45_codec = pb::FieldCodec.ForStructWrapper<double>(362);
     private double? doubleField45_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField45 {
       get { return doubleField45_; }
       set {
@@ -1499,6 +1591,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField46_codec = pb::FieldCodec.ForStructWrapper<double>(370);
     private double? doubleField46_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField46 {
       get { return doubleField46_; }
       set {
@@ -1512,6 +1605,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField78_codec = pb::FieldCodec.ForStructWrapper<double>(626);
     private double? doubleField78_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField78 {
       get { return doubleField78_; }
       set {
@@ -1525,6 +1619,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField88_codec = pb::FieldCodec.ForStructWrapper<double>(706);
     private double? doubleField88_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField88 {
       get { return doubleField88_; }
       set {
@@ -1538,6 +1633,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField47_codec = pb::FieldCodec.ForStructWrapper<double>(378);
     private double? doubleField47_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField47 {
       get { return doubleField47_; }
       set {
@@ -1551,6 +1647,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField89_codec = pb::FieldCodec.ForStructWrapper<double>(714);
     private double? doubleField89_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField89 {
       get { return doubleField89_; }
       set {
@@ -1564,6 +1661,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField48_codec = pb::FieldCodec.ForStructWrapper<double>(386);
     private double? doubleField48_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField48 {
       get { return doubleField48_; }
       set {
@@ -1577,6 +1675,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField49_codec = pb::FieldCodec.ForStructWrapper<double>(394);
     private double? doubleField49_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField49 {
       get { return doubleField49_; }
       set {
@@ -1590,6 +1689,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField50_codec = pb::FieldCodec.ForStructWrapper<double>(402);
     private double? doubleField50_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField50 {
       get { return doubleField50_; }
       set {
@@ -1603,6 +1703,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField90_codec = pb::FieldCodec.ForStructWrapper<double>(722);
     private double? doubleField90_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField90 {
       get { return doubleField90_; }
       set {
@@ -1616,6 +1717,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField51_codec = pb::FieldCodec.ForStructWrapper<double>(410);
     private double? doubleField51_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField51 {
       get { return doubleField51_; }
       set {
@@ -1629,6 +1731,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField91_codec = pb::FieldCodec.ForStructWrapper<double>(730);
     private double? doubleField91_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField91 {
       get { return doubleField91_; }
       set {
@@ -1642,6 +1745,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField92_codec = pb::FieldCodec.ForStructWrapper<double>(738);
     private double? doubleField92_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField92 {
       get { return doubleField92_; }
       set {
@@ -1655,6 +1759,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field107_codec = pb::FieldCodec.ForStructWrapper<long>(858);
     private long? int64Field107_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field107 {
       get { return int64Field107_; }
       set {
@@ -1668,6 +1773,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField93_codec = pb::FieldCodec.ForStructWrapper<double>(746);
     private double? doubleField93_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField93 {
       get { return doubleField93_; }
       set {
@@ -1681,6 +1787,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField108_codec = pb::FieldCodec.ForStructWrapper<double>(866);
     private double? doubleField108_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField108 {
       get { return doubleField108_; }
       set {
@@ -1694,6 +1801,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField52_codec = pb::FieldCodec.ForStructWrapper<double>(418);
     private double? doubleField52_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField52 {
       get { return doubleField52_; }
       set {
@@ -1707,6 +1815,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField53_codec = pb::FieldCodec.ForStructWrapper<double>(426);
     private double? doubleField53_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField53 {
       get { return doubleField53_; }
       set {
@@ -1720,6 +1829,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField94_codec = pb::FieldCodec.ForStructWrapper<double>(754);
     private double? doubleField94_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField94 {
       get { return doubleField94_; }
       set {
@@ -1733,6 +1843,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField54_codec = pb::FieldCodec.ForStructWrapper<double>(434);
     private double? doubleField54_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField54 {
       get { return doubleField54_; }
       set {
@@ -1746,6 +1857,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField55_codec = pb::FieldCodec.ForStructWrapper<double>(442);
     private double? doubleField55_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField55 {
       get { return doubleField55_; }
       set {
@@ -1759,6 +1871,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField56_codec = pb::FieldCodec.ForStructWrapper<double>(450);
     private double? doubleField56_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField56 {
       get { return doubleField56_; }
       set {
@@ -1772,6 +1885,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField57_codec = pb::FieldCodec.ForStructWrapper<double>(458);
     private double? doubleField57_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField57 {
       get { return doubleField57_; }
       set {
@@ -1785,6 +1899,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<double?> _single_doubleField58_codec = pb::FieldCodec.ForStructWrapper<double>(466);
     private double? doubleField58_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField58 {
       get { return doubleField58_; }
       set {
@@ -1798,6 +1913,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field59_codec = pb::FieldCodec.ForStructWrapper<long>(474);
     private long? int64Field59_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field59 {
       get { return int64Field59_; }
       set {
@@ -1811,6 +1927,7 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::FieldCodec<long?> _single_int64Field60_codec = pb::FieldCodec.ForStructWrapper<long>(482);
     private long? int64Field60_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field60 {
       get { return int64Field60_; }
       set {
@@ -1820,11 +1937,13 @@ namespace Google.Protobuf.Benchmarks {
 
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ManyWrapperFieldsMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ManyWrapperFieldsMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1947,6 +2066,7 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (doubleField95_ != null) hash ^= pbc::ProtobufEqualityComparers.BitwiseNullableDoubleEqualityComparer.GetHashCode(DoubleField95);
@@ -2067,11 +2187,13 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2418,6 +2540,7 @@ namespace Google.Protobuf.Benchmarks {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (doubleField1_ != null) {
         _single_doubleField1_codec.WriteTagAndValue(ref output, DoubleField1);
@@ -2760,6 +2883,7 @@ namespace Google.Protobuf.Benchmarks {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (doubleField95_ != null) {
@@ -3100,6 +3224,7 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ManyWrapperFieldsMessage other) {
       if (other == null) {
         return;
@@ -3653,6 +3778,7 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -4436,6 +4562,7 @@ namespace Google.Protobuf.Benchmarks {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5228,19 +5355,23 @@ namespace Google.Protobuf.Benchmarks {
     private static readonly pb::MessageParser<ManyPrimitiveFieldsMessage> _parser = new pb::MessageParser<ManyPrimitiveFieldsMessage>(() => new ManyPrimitiveFieldsMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ManyPrimitiveFieldsMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Benchmarks.WrapperBenchmarkMessagesReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ManyPrimitiveFieldsMessage() {
       OnConstruction();
     }
@@ -5248,6 +5379,7 @@ namespace Google.Protobuf.Benchmarks {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ManyPrimitiveFieldsMessage(ManyPrimitiveFieldsMessage other) : this() {
       doubleField95_ = other.doubleField95_;
       doubleField1_ = other.doubleField1_;
@@ -5364,6 +5496,7 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ManyPrimitiveFieldsMessage Clone() {
       return new ManyPrimitiveFieldsMessage(this);
     }
@@ -5372,6 +5505,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField95FieldNumber = 95;
     private double doubleField95_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField95 {
       get { return doubleField95_; }
       set {
@@ -5383,6 +5517,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField1FieldNumber = 1;
     private double doubleField1_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField1 {
       get { return doubleField1_; }
       set {
@@ -5394,6 +5529,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField79FieldNumber = 79;
     private double doubleField79_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField79 {
       get { return doubleField79_; }
       set {
@@ -5405,6 +5541,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field2FieldNumber = 2;
     private long int64Field2_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field2 {
       get { return int64Field2_; }
       set {
@@ -5416,6 +5553,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField96FieldNumber = 96;
     private double doubleField96_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField96 {
       get { return doubleField96_; }
       set {
@@ -5427,6 +5565,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field3FieldNumber = 3;
     private long int64Field3_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field3 {
       get { return int64Field3_; }
       set {
@@ -5438,6 +5577,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field4FieldNumber = 4;
     private long int64Field4_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field4 {
       get { return int64Field4_; }
       set {
@@ -5449,6 +5589,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField97FieldNumber = 97;
     private double doubleField97_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField97 {
       get { return doubleField97_; }
       set {
@@ -5460,6 +5601,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField65FieldNumber = 65;
     private double doubleField65_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField65 {
       get { return doubleField65_; }
       set {
@@ -5471,6 +5613,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField66FieldNumber = 66;
     private double doubleField66_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField66 {
       get { return doubleField66_; }
       set {
@@ -5482,6 +5625,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField7FieldNumber = 7;
     private double doubleField7_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField7 {
       get { return doubleField7_; }
       set {
@@ -5493,6 +5637,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField62FieldNumber = 62;
     private double doubleField62_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField62 {
       get { return doubleField62_; }
       set {
@@ -5504,6 +5649,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField118FieldNumber = 118;
     private double doubleField118_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField118 {
       get { return doubleField118_; }
       set {
@@ -5515,6 +5661,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField119FieldNumber = 119;
     private double doubleField119_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField119 {
       get { return doubleField119_; }
       set {
@@ -5526,6 +5673,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField67FieldNumber = 67;
     private double doubleField67_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField67 {
       get { return doubleField67_; }
       set {
@@ -5537,6 +5685,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField120FieldNumber = 120;
     private double doubleField120_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField120 {
       get { return doubleField120_; }
       set {
@@ -5548,6 +5697,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField121FieldNumber = 121;
     private double doubleField121_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField121 {
       get { return doubleField121_; }
       set {
@@ -5559,6 +5709,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField122FieldNumber = 122;
     private double doubleField122_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField122 {
       get { return doubleField122_; }
       set {
@@ -5570,6 +5721,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField123FieldNumber = 123;
     private double doubleField123_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField123 {
       get { return doubleField123_; }
       set {
@@ -5581,6 +5733,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField124FieldNumber = 124;
     private double doubleField124_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField124 {
       get { return doubleField124_; }
       set {
@@ -5592,6 +5745,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField8FieldNumber = 8;
     private double doubleField8_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField8 {
       get { return doubleField8_; }
       set {
@@ -5603,6 +5757,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField9FieldNumber = 9;
     private double doubleField9_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField9 {
       get { return doubleField9_; }
       set {
@@ -5614,6 +5769,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField98FieldNumber = 98;
     private double doubleField98_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField98 {
       get { return doubleField98_; }
       set {
@@ -5625,6 +5781,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField10FieldNumber = 10;
     private double doubleField10_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField10 {
       get { return doubleField10_; }
       set {
@@ -5636,6 +5793,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField11FieldNumber = 11;
     private double doubleField11_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField11 {
       get { return doubleField11_; }
       set {
@@ -5647,6 +5805,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField99FieldNumber = 99;
     private double doubleField99_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField99 {
       get { return doubleField99_; }
       set {
@@ -5658,6 +5817,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField84FieldNumber = 84;
     private double doubleField84_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField84 {
       get { return doubleField84_; }
       set {
@@ -5669,6 +5829,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField14FieldNumber = 14;
     private double doubleField14_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField14 {
       get { return doubleField14_; }
       set {
@@ -5680,6 +5841,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField77FieldNumber = 77;
     private double doubleField77_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField77 {
       get { return doubleField77_; }
       set {
@@ -5691,6 +5853,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField15FieldNumber = 15;
     private double doubleField15_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField15 {
       get { return doubleField15_; }
       set {
@@ -5702,6 +5865,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field19FieldNumber = 19;
     private long int64Field19_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field19 {
       get { return int64Field19_; }
       set {
@@ -5713,6 +5877,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field115FieldNumber = 115;
     private long int64Field115_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field115 {
       get { return int64Field115_; }
       set {
@@ -5724,6 +5889,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField116FieldNumber = 116;
     private double doubleField116_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField116 {
       get { return doubleField116_; }
       set {
@@ -5735,6 +5901,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field117FieldNumber = 117;
     private long int64Field117_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field117 {
       get { return int64Field117_; }
       set {
@@ -5746,6 +5913,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField20FieldNumber = 20;
     private double doubleField20_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField20 {
       get { return doubleField20_; }
       set {
@@ -5757,6 +5925,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField21FieldNumber = 21;
     private double doubleField21_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField21 {
       get { return doubleField21_; }
       set {
@@ -5768,6 +5937,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int StringField73FieldNumber = 73;
     private string stringField73_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringField73 {
       get { return stringField73_; }
       set {
@@ -5779,6 +5949,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int StringField74FieldNumber = 74;
     private string stringField74_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringField74 {
       get { return stringField74_; }
       set {
@@ -5790,6 +5961,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField22FieldNumber = 22;
     private double doubleField22_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField22 {
       get { return doubleField22_; }
       set {
@@ -5801,6 +5973,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField69FieldNumber = 69;
     private double doubleField69_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField69 {
       get { return doubleField69_; }
       set {
@@ -5812,6 +5985,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField70FieldNumber = 70;
     private double doubleField70_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField70 {
       get { return doubleField70_; }
       set {
@@ -5823,6 +5997,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField71FieldNumber = 71;
     private double doubleField71_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField71 {
       get { return doubleField71_; }
       set {
@@ -5834,6 +6009,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField72FieldNumber = 72;
     private double doubleField72_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField72 {
       get { return doubleField72_; }
       set {
@@ -5845,6 +6021,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField25FieldNumber = 25;
     private double doubleField25_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField25 {
       get { return doubleField25_; }
       set {
@@ -5856,6 +6033,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field26FieldNumber = 26;
     private long int64Field26_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field26 {
       get { return int64Field26_; }
       set {
@@ -5867,6 +6045,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField68FieldNumber = 68;
     private double doubleField68_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField68 {
       get { return doubleField68_; }
       set {
@@ -5878,6 +6057,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField28FieldNumber = 28;
     private double doubleField28_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField28 {
       get { return doubleField28_; }
       set {
@@ -5889,6 +6069,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField106FieldNumber = 106;
     private double doubleField106_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField106 {
       get { return doubleField106_; }
       set {
@@ -5900,6 +6081,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField29FieldNumber = 29;
     private double doubleField29_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField29 {
       get { return doubleField29_; }
       set {
@@ -5911,6 +6093,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField30FieldNumber = 30;
     private double doubleField30_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField30 {
       get { return doubleField30_; }
       set {
@@ -5922,6 +6105,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField101FieldNumber = 101;
     private double doubleField101_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField101 {
       get { return doubleField101_; }
       set {
@@ -5933,6 +6117,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField102FieldNumber = 102;
     private double doubleField102_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField102 {
       get { return doubleField102_; }
       set {
@@ -5944,6 +6129,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField103FieldNumber = 103;
     private double doubleField103_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField103 {
       get { return doubleField103_; }
       set {
@@ -5955,6 +6141,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField104FieldNumber = 104;
     private double doubleField104_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField104 {
       get { return doubleField104_; }
       set {
@@ -5966,6 +6153,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField105FieldNumber = 105;
     private double doubleField105_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField105 {
       get { return doubleField105_; }
       set {
@@ -5977,6 +6165,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField31FieldNumber = 31;
     private double doubleField31_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField31 {
       get { return doubleField31_; }
       set {
@@ -5988,6 +6177,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field32FieldNumber = 32;
     private long int64Field32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field32 {
       get { return int64Field32_; }
       set {
@@ -5999,6 +6189,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField75FieldNumber = 75;
     private double doubleField75_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField75 {
       get { return doubleField75_; }
       set {
@@ -6010,6 +6201,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField129FieldNumber = 129;
     private double doubleField129_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField129 {
       get { return doubleField129_; }
       set {
@@ -6021,6 +6213,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int EnumField80FieldNumber = 80;
     private int enumField80_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int EnumField80 {
       get { return enumField80_; }
       set {
@@ -6032,6 +6225,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int EnumField81FieldNumber = 81;
     private int enumField81_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int EnumField81 {
       get { return enumField81_; }
       set {
@@ -6043,6 +6237,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field82FieldNumber = 82;
     private long int64Field82_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field82 {
       get { return int64Field82_; }
       set {
@@ -6054,6 +6249,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int EnumField83FieldNumber = 83;
     private int enumField83_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int EnumField83 {
       get { return enumField83_; }
       set {
@@ -6065,6 +6261,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field85FieldNumber = 85;
     private long int64Field85_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field85 {
       get { return int64Field85_; }
       set {
@@ -6076,6 +6273,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field86FieldNumber = 86;
     private long int64Field86_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field86 {
       get { return int64Field86_; }
       set {
@@ -6087,6 +6285,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field87FieldNumber = 87;
     private long int64Field87_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field87 {
       get { return int64Field87_; }
       set {
@@ -6098,6 +6297,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field125FieldNumber = 125;
     private long int64Field125_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field125 {
       get { return int64Field125_; }
       set {
@@ -6109,6 +6309,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field37FieldNumber = 37;
     private long int64Field37_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field37 {
       get { return int64Field37_; }
       set {
@@ -6120,6 +6321,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField38FieldNumber = 38;
     private double doubleField38_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField38 {
       get { return doubleField38_; }
       set {
@@ -6131,6 +6333,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int InteractionsFieldNumber = 39;
     private long interactions_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Interactions {
       get { return interactions_; }
       set {
@@ -6144,6 +6347,7 @@ namespace Google.Protobuf.Benchmarks {
         = pb::FieldCodec.ForInt32(802);
     private readonly pbc::RepeatedField<int> repeatedIntField100_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedIntField100 {
       get { return repeatedIntField100_; }
     }
@@ -6152,6 +6356,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField40FieldNumber = 40;
     private double doubleField40_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField40 {
       get { return doubleField40_; }
       set {
@@ -6163,6 +6368,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field41FieldNumber = 41;
     private long int64Field41_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field41 {
       get { return int64Field41_; }
       set {
@@ -6174,6 +6380,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field126FieldNumber = 126;
     private long int64Field126_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field126 {
       get { return int64Field126_; }
       set {
@@ -6185,6 +6392,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field127FieldNumber = 127;
     private long int64Field127_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field127 {
       get { return int64Field127_; }
       set {
@@ -6196,6 +6404,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField128FieldNumber = 128;
     private double doubleField128_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField128 {
       get { return doubleField128_; }
       set {
@@ -6207,6 +6416,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField109FieldNumber = 109;
     private double doubleField109_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField109 {
       get { return doubleField109_; }
       set {
@@ -6218,6 +6428,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field110FieldNumber = 110;
     private long int64Field110_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field110 {
       get { return int64Field110_; }
       set {
@@ -6229,6 +6440,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField111FieldNumber = 111;
     private double doubleField111_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField111 {
       get { return doubleField111_; }
       set {
@@ -6240,6 +6452,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field112FieldNumber = 112;
     private long int64Field112_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field112 {
       get { return int64Field112_; }
       set {
@@ -6251,6 +6464,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField113FieldNumber = 113;
     private double doubleField113_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField113 {
       get { return doubleField113_; }
       set {
@@ -6262,6 +6476,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field114FieldNumber = 114;
     private long int64Field114_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field114 {
       get { return int64Field114_; }
       set {
@@ -6273,6 +6488,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField42FieldNumber = 42;
     private double doubleField42_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField42 {
       get { return doubleField42_; }
       set {
@@ -6284,6 +6500,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field43FieldNumber = 43;
     private long int64Field43_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field43 {
       get { return int64Field43_; }
       set {
@@ -6295,6 +6512,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field44FieldNumber = 44;
     private long int64Field44_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field44 {
       get { return int64Field44_; }
       set {
@@ -6306,6 +6524,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField45FieldNumber = 45;
     private double doubleField45_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField45 {
       get { return doubleField45_; }
       set {
@@ -6317,6 +6536,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField46FieldNumber = 46;
     private double doubleField46_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField46 {
       get { return doubleField46_; }
       set {
@@ -6328,6 +6548,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField78FieldNumber = 78;
     private double doubleField78_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField78 {
       get { return doubleField78_; }
       set {
@@ -6339,6 +6560,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField88FieldNumber = 88;
     private double doubleField88_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField88 {
       get { return doubleField88_; }
       set {
@@ -6350,6 +6572,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField47FieldNumber = 47;
     private double doubleField47_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField47 {
       get { return doubleField47_; }
       set {
@@ -6361,6 +6584,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField89FieldNumber = 89;
     private double doubleField89_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField89 {
       get { return doubleField89_; }
       set {
@@ -6372,6 +6596,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField48FieldNumber = 48;
     private double doubleField48_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField48 {
       get { return doubleField48_; }
       set {
@@ -6383,6 +6608,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField49FieldNumber = 49;
     private double doubleField49_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField49 {
       get { return doubleField49_; }
       set {
@@ -6394,6 +6620,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField50FieldNumber = 50;
     private double doubleField50_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField50 {
       get { return doubleField50_; }
       set {
@@ -6405,6 +6632,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField90FieldNumber = 90;
     private double doubleField90_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField90 {
       get { return doubleField90_; }
       set {
@@ -6416,6 +6644,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField51FieldNumber = 51;
     private double doubleField51_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField51 {
       get { return doubleField51_; }
       set {
@@ -6427,6 +6656,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField91FieldNumber = 91;
     private double doubleField91_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField91 {
       get { return doubleField91_; }
       set {
@@ -6438,6 +6668,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField92FieldNumber = 92;
     private double doubleField92_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField92 {
       get { return doubleField92_; }
       set {
@@ -6449,6 +6680,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field107FieldNumber = 107;
     private long int64Field107_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field107 {
       get { return int64Field107_; }
       set {
@@ -6460,6 +6692,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField93FieldNumber = 93;
     private double doubleField93_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField93 {
       get { return doubleField93_; }
       set {
@@ -6471,6 +6704,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField108FieldNumber = 108;
     private double doubleField108_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField108 {
       get { return doubleField108_; }
       set {
@@ -6482,6 +6716,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField52FieldNumber = 52;
     private double doubleField52_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField52 {
       get { return doubleField52_; }
       set {
@@ -6493,6 +6728,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField53FieldNumber = 53;
     private double doubleField53_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField53 {
       get { return doubleField53_; }
       set {
@@ -6504,6 +6740,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField94FieldNumber = 94;
     private double doubleField94_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField94 {
       get { return doubleField94_; }
       set {
@@ -6515,6 +6752,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField54FieldNumber = 54;
     private double doubleField54_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField54 {
       get { return doubleField54_; }
       set {
@@ -6526,6 +6764,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField55FieldNumber = 55;
     private double doubleField55_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField55 {
       get { return doubleField55_; }
       set {
@@ -6537,6 +6776,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField56FieldNumber = 56;
     private double doubleField56_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField56 {
       get { return doubleField56_; }
       set {
@@ -6548,6 +6788,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField57FieldNumber = 57;
     private double doubleField57_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField57 {
       get { return doubleField57_; }
       set {
@@ -6559,6 +6800,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int DoubleField58FieldNumber = 58;
     private double doubleField58_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleField58 {
       get { return doubleField58_; }
       set {
@@ -6570,6 +6812,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field59FieldNumber = 59;
     private long int64Field59_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field59 {
       get { return int64Field59_; }
       set {
@@ -6581,6 +6824,7 @@ namespace Google.Protobuf.Benchmarks {
     public const int Int64Field60FieldNumber = 60;
     private long int64Field60_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Int64Field60 {
       get { return int64Field60_; }
       set {
@@ -6589,11 +6833,13 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ManyPrimitiveFieldsMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ManyPrimitiveFieldsMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6716,6 +6962,7 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (DoubleField95 != 0D) hash ^= pbc::ProtobufEqualityComparers.BitwiseDoubleEqualityComparer.GetHashCode(DoubleField95);
@@ -6836,11 +7083,13 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -7294,6 +7543,7 @@ namespace Google.Protobuf.Benchmarks {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (DoubleField1 != 0D) {
         output.WriteRawTag(9);
@@ -7743,6 +7993,7 @@ namespace Google.Protobuf.Benchmarks {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (DoubleField95 != 0D) {
@@ -8083,6 +8334,7 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ManyPrimitiveFieldsMessage other) {
       if (other == null) {
         return;
@@ -8422,6 +8674,7 @@ namespace Google.Protobuf.Benchmarks {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -8884,6 +9137,7 @@ namespace Google.Protobuf.Benchmarks {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Conformance/Conformance.cs b/csharp/src/Google.Protobuf.Conformance/Conformance.cs
index 06b61ea8bd..fb053b2576 100644
--- a/csharp/src/Google.Protobuf.Conformance/Conformance.cs
+++ b/csharp/src/Google.Protobuf.Conformance/Conformance.cs
@@ -115,19 +115,23 @@ namespace Conformance {
     private static readonly pb::MessageParser<FailureSet> _parser = new pb::MessageParser<FailureSet>(() => new FailureSet());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FailureSet> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Conformance.ConformanceReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FailureSet() {
       OnConstruction();
     }
@@ -135,12 +139,14 @@ namespace Conformance {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FailureSet(FailureSet other) : this() {
       failure_ = other.failure_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FailureSet Clone() {
       return new FailureSet(this);
     }
@@ -151,16 +157,19 @@ namespace Conformance {
         = pb::FieldCodec.ForString(10);
     private readonly pbc::RepeatedField<string> failure_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> Failure {
       get { return failure_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FailureSet);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FailureSet other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -173,6 +182,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= failure_.GetHashCode();
@@ -183,11 +193,13 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -201,6 +213,7 @@ namespace Conformance {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       failure_.WriteTo(ref output, _repeated_failure_codec);
       if (_unknownFields != null) {
@@ -210,6 +223,7 @@ namespace Conformance {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += failure_.CalculateSize(_repeated_failure_codec);
@@ -220,6 +234,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FailureSet other) {
       if (other == null) {
         return;
@@ -229,6 +244,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -250,6 +266,7 @@ namespace Conformance {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -283,19 +300,23 @@ namespace Conformance {
     private static readonly pb::MessageParser<ConformanceRequest> _parser = new pb::MessageParser<ConformanceRequest>(() => new ConformanceRequest());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ConformanceRequest> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Conformance.ConformanceReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ConformanceRequest() {
       OnConstruction();
     }
@@ -303,6 +324,7 @@ namespace Conformance {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ConformanceRequest(ConformanceRequest other) : this() {
       requestedOutputFormat_ = other.requestedOutputFormat_;
       messageType_ = other.messageType_;
@@ -328,6 +350,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ConformanceRequest Clone() {
       return new ConformanceRequest(this);
     }
@@ -335,6 +358,7 @@ namespace Conformance {
     /// <summary>Field number for the "protobuf_payload" field.</summary>
     public const int ProtobufPayloadFieldNumber = 1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString ProtobufPayload {
       get { return payloadCase_ == PayloadOneofCase.ProtobufPayload ? (pb::ByteString) payload_ : pb::ByteString.Empty; }
       set {
@@ -346,6 +370,7 @@ namespace Conformance {
     /// <summary>Field number for the "json_payload" field.</summary>
     public const int JsonPayloadFieldNumber = 2;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string JsonPayload {
       get { return payloadCase_ == PayloadOneofCase.JsonPayload ? (string) payload_ : ""; }
       set {
@@ -360,6 +385,7 @@ namespace Conformance {
     /// Google internal only.  Opensource testees just skip it.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string JspbPayload {
       get { return payloadCase_ == PayloadOneofCase.JspbPayload ? (string) payload_ : ""; }
       set {
@@ -371,6 +397,7 @@ namespace Conformance {
     /// <summary>Field number for the "text_payload" field.</summary>
     public const int TextPayloadFieldNumber = 8;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string TextPayload {
       get { return payloadCase_ == PayloadOneofCase.TextPayload ? (string) payload_ : ""; }
       set {
@@ -386,6 +413,7 @@ namespace Conformance {
     /// Which format should the testee serialize its message to?
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Conformance.WireFormat RequestedOutputFormat {
       get { return requestedOutputFormat_; }
       set {
@@ -402,6 +430,7 @@ namespace Conformance {
     /// protobuf_test_messages.proto2.TestAllTypesProto2.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string MessageType {
       get { return messageType_; }
       set {
@@ -418,6 +447,7 @@ namespace Conformance {
     /// for more information.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Conformance.TestCategory TestCategory {
       get { return testCategory_; }
       set {
@@ -432,6 +462,7 @@ namespace Conformance {
     /// Specify details for how to encode jspb.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Conformance.JspbEncodingConfig JspbEncodingOptions {
       get { return jspbEncodingOptions_; }
       set {
@@ -447,6 +478,7 @@ namespace Conformance {
     /// unknown fields instead of ignore. This feature is optional.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool PrintUnknownFields {
       get { return printUnknownFields_; }
       set {
@@ -465,22 +497,26 @@ namespace Conformance {
     }
     private PayloadOneofCase payloadCase_ = PayloadOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public PayloadOneofCase PayloadCase {
       get { return payloadCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearPayload() {
       payloadCase_ = PayloadOneofCase.None;
       payload_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ConformanceRequest);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ConformanceRequest other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -502,6 +538,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (payloadCase_ == PayloadOneofCase.ProtobufPayload) hash ^= ProtobufPayload.GetHashCode();
@@ -521,11 +558,13 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -574,6 +613,7 @@ namespace Conformance {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (payloadCase_ == PayloadOneofCase.ProtobufPayload) {
         output.WriteRawTag(10);
@@ -618,6 +658,7 @@ namespace Conformance {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (payloadCase_ == PayloadOneofCase.ProtobufPayload) {
@@ -654,6 +695,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ConformanceRequest other) {
       if (other == null) {
         return;
@@ -695,6 +737,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -751,6 +794,7 @@ namespace Conformance {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -815,19 +859,23 @@ namespace Conformance {
     private static readonly pb::MessageParser<ConformanceResponse> _parser = new pb::MessageParser<ConformanceResponse>(() => new ConformanceResponse());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ConformanceResponse> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Conformance.ConformanceReflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ConformanceResponse() {
       OnConstruction();
     }
@@ -835,6 +883,7 @@ namespace Conformance {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ConformanceResponse(ConformanceResponse other) : this() {
       switch (other.ResultCase) {
         case ResultOneofCase.ParseError:
@@ -867,6 +916,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ConformanceResponse Clone() {
       return new ConformanceResponse(this);
     }
@@ -881,6 +931,7 @@ namespace Conformance {
     /// test.  Some of the test cases are intentionally invalid input.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string ParseError {
       get { return resultCase_ == ResultOneofCase.ParseError ? (string) result_ : ""; }
       set {
@@ -897,6 +948,7 @@ namespace Conformance {
     /// this field.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string SerializeError {
       get { return resultCase_ == ResultOneofCase.SerializeError ? (string) result_ : ""; }
       set {
@@ -913,6 +965,7 @@ namespace Conformance {
     /// about the failure.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string RuntimeError {
       get { return resultCase_ == ResultOneofCase.RuntimeError ? (string) result_ : ""; }
       set {
@@ -928,6 +981,7 @@ namespace Conformance {
     /// protobuf, serialize it to protobuf and set it in this field.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString ProtobufPayload {
       get { return resultCase_ == ResultOneofCase.ProtobufPayload ? (pb::ByteString) result_ : pb::ByteString.Empty; }
       set {
@@ -943,6 +997,7 @@ namespace Conformance {
     /// serialize to JSON and set it in this field.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string JsonPayload {
       get { return resultCase_ == ResultOneofCase.JsonPayload ? (string) result_ : ""; }
       set {
@@ -958,6 +1013,7 @@ namespace Conformance {
     /// wasn't supported, like JSON input/output.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Skipped {
       get { return resultCase_ == ResultOneofCase.Skipped ? (string) result_ : ""; }
       set {
@@ -974,6 +1030,7 @@ namespace Conformance {
     /// format. Opensource testees can just skip it.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string JspbPayload {
       get { return resultCase_ == ResultOneofCase.JspbPayload ? (string) result_ : ""; }
       set {
@@ -989,6 +1046,7 @@ namespace Conformance {
     /// TEXT_FORMAT, serialize to TEXT_FORMAT and set it in this field.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string TextPayload {
       get { return resultCase_ == ResultOneofCase.TextPayload ? (string) result_ : ""; }
       set {
@@ -1012,22 +1070,26 @@ namespace Conformance {
     }
     private ResultOneofCase resultCase_ = ResultOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ResultOneofCase ResultCase {
       get { return resultCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearResult() {
       resultCase_ = ResultOneofCase.None;
       result_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ConformanceResponse);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ConformanceResponse other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1048,6 +1110,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (resultCase_ == ResultOneofCase.ParseError) hash ^= ParseError.GetHashCode();
@@ -1066,11 +1129,13 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1115,6 +1180,7 @@ namespace Conformance {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (resultCase_ == ResultOneofCase.ParseError) {
         output.WriteRawTag(10);
@@ -1155,6 +1221,7 @@ namespace Conformance {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (resultCase_ == ResultOneofCase.ParseError) {
@@ -1188,6 +1255,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ConformanceResponse other) {
       if (other == null) {
         return;
@@ -1223,6 +1291,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1272,6 +1341,7 @@ namespace Conformance {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1329,19 +1399,23 @@ namespace Conformance {
     private static readonly pb::MessageParser<JspbEncodingConfig> _parser = new pb::MessageParser<JspbEncodingConfig>(() => new JspbEncodingConfig());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<JspbEncodingConfig> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Conformance.ConformanceReflection.Descriptor.MessageTypes[3]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public JspbEncodingConfig() {
       OnConstruction();
     }
@@ -1349,12 +1423,14 @@ namespace Conformance {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public JspbEncodingConfig(JspbEncodingConfig other) : this() {
       useJspbArrayAnyFormat_ = other.useJspbArrayAnyFormat_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public JspbEncodingConfig Clone() {
       return new JspbEncodingConfig(this);
     }
@@ -1366,6 +1442,7 @@ namespace Conformance {
     /// Encode the value field of Any as jspb array if true, otherwise binary.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool UseJspbArrayAnyFormat {
       get { return useJspbArrayAnyFormat_; }
       set {
@@ -1374,11 +1451,13 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as JspbEncodingConfig);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(JspbEncodingConfig other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1391,6 +1470,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (UseJspbArrayAnyFormat != false) hash ^= UseJspbArrayAnyFormat.GetHashCode();
@@ -1401,11 +1481,13 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1422,6 +1504,7 @@ namespace Conformance {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (UseJspbArrayAnyFormat != false) {
         output.WriteRawTag(8);
@@ -1434,6 +1517,7 @@ namespace Conformance {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (UseJspbArrayAnyFormat != false) {
@@ -1446,6 +1530,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(JspbEncodingConfig other) {
       if (other == null) {
         return;
@@ -1457,6 +1542,7 @@ namespace Conformance {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1478,6 +1564,7 @@ namespace Conformance {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/MapUnittestProto3.cs b/csharp/src/Google.Protobuf.Test.TestProtos/MapUnittestProto3.cs
index bbf0061f88..4791b73253 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/MapUnittestProto3.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/MapUnittestProto3.cs
@@ -184,19 +184,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestMap> _parser = new pb::MessageParser<TestMap>(() => new TestMap());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestMap> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.MapUnittestProto3Reflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMap() {
       OnConstruction();
     }
@@ -204,6 +208,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMap(TestMap other) : this() {
       mapInt32Int32_ = other.mapInt32Int32_.Clone();
       mapInt64Int64_ = other.mapInt64Int64_.Clone();
@@ -226,6 +231,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMap Clone() {
       return new TestMap(this);
     }
@@ -236,6 +242,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForInt32(16, 0), 10);
     private readonly pbc::MapField<int, int> mapInt32Int32_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapInt32Int32 {
       get { return mapInt32Int32_; }
     }
@@ -246,6 +253,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForInt64(8, 0L), pb::FieldCodec.ForInt64(16, 0L), 18);
     private readonly pbc::MapField<long, long> mapInt64Int64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapInt64Int64 {
       get { return mapInt64Int64_; }
     }
@@ -256,6 +264,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<uint, uint>.Codec(pb::FieldCodec.ForUInt32(8, 0), pb::FieldCodec.ForUInt32(16, 0), 26);
     private readonly pbc::MapField<uint, uint> mapUint32Uint32_ = new pbc::MapField<uint, uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<uint, uint> MapUint32Uint32 {
       get { return mapUint32Uint32_; }
     }
@@ -266,6 +275,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<ulong, ulong>.Codec(pb::FieldCodec.ForUInt64(8, 0UL), pb::FieldCodec.ForUInt64(16, 0UL), 34);
     private readonly pbc::MapField<ulong, ulong> mapUint64Uint64_ = new pbc::MapField<ulong, ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<ulong, ulong> MapUint64Uint64 {
       get { return mapUint64Uint64_; }
     }
@@ -276,6 +286,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForSInt32(8, 0), pb::FieldCodec.ForSInt32(16, 0), 42);
     private readonly pbc::MapField<int, int> mapSint32Sint32_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapSint32Sint32 {
       get { return mapSint32Sint32_; }
     }
@@ -286,6 +297,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForSInt64(8, 0L), pb::FieldCodec.ForSInt64(16, 0L), 50);
     private readonly pbc::MapField<long, long> mapSint64Sint64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapSint64Sint64 {
       get { return mapSint64Sint64_; }
     }
@@ -296,6 +308,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<uint, uint>.Codec(pb::FieldCodec.ForFixed32(13, 0), pb::FieldCodec.ForFixed32(21, 0), 58);
     private readonly pbc::MapField<uint, uint> mapFixed32Fixed32_ = new pbc::MapField<uint, uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<uint, uint> MapFixed32Fixed32 {
       get { return mapFixed32Fixed32_; }
     }
@@ -306,6 +319,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<ulong, ulong>.Codec(pb::FieldCodec.ForFixed64(9, 0UL), pb::FieldCodec.ForFixed64(17, 0UL), 66);
     private readonly pbc::MapField<ulong, ulong> mapFixed64Fixed64_ = new pbc::MapField<ulong, ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<ulong, ulong> MapFixed64Fixed64 {
       get { return mapFixed64Fixed64_; }
     }
@@ -316,6 +330,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForSFixed32(13, 0), pb::FieldCodec.ForSFixed32(21, 0), 74);
     private readonly pbc::MapField<int, int> mapSfixed32Sfixed32_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapSfixed32Sfixed32 {
       get { return mapSfixed32Sfixed32_; }
     }
@@ -326,6 +341,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForSFixed64(9, 0L), pb::FieldCodec.ForSFixed64(17, 0L), 82);
     private readonly pbc::MapField<long, long> mapSfixed64Sfixed64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapSfixed64Sfixed64 {
       get { return mapSfixed64Sfixed64_; }
     }
@@ -336,6 +352,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, float>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForFloat(21, 0F), 90);
     private readonly pbc::MapField<int, float> mapInt32Float_ = new pbc::MapField<int, float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, float> MapInt32Float {
       get { return mapInt32Float_; }
     }
@@ -346,6 +363,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, double>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForDouble(17, 0D), 98);
     private readonly pbc::MapField<int, double> mapInt32Double_ = new pbc::MapField<int, double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, double> MapInt32Double {
       get { return mapInt32Double_; }
     }
@@ -356,6 +374,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<bool, bool>.Codec(pb::FieldCodec.ForBool(8, false), pb::FieldCodec.ForBool(16, false), 106);
     private readonly pbc::MapField<bool, bool> mapBoolBool_ = new pbc::MapField<bool, bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<bool, bool> MapBoolBool {
       get { return mapBoolBool_; }
     }
@@ -366,6 +385,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<string, string>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForString(18, ""), 114);
     private readonly pbc::MapField<string, string> mapStringString_ = new pbc::MapField<string, string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, string> MapStringString {
       get { return mapStringString_; }
     }
@@ -376,6 +396,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, pb::ByteString>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForBytes(18, pb::ByteString.Empty), 122);
     private readonly pbc::MapField<int, pb::ByteString> mapInt32Bytes_ = new pbc::MapField<int, pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, pb::ByteString> MapInt32Bytes {
       get { return mapInt32Bytes_; }
     }
@@ -386,6 +407,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.TestProtos.MapEnum>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForEnum(16, x => (int) x, x => (global::Google.Protobuf.TestProtos.MapEnum) x, global::Google.Protobuf.TestProtos.MapEnum.Foo), 130);
     private readonly pbc::MapField<int, global::Google.Protobuf.TestProtos.MapEnum> mapInt32Enum_ = new pbc::MapField<int, global::Google.Protobuf.TestProtos.MapEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.TestProtos.MapEnum> MapInt32Enum {
       get { return mapInt32Enum_; }
     }
@@ -396,16 +418,19 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.TestProtos.ForeignMessage>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.TestProtos.ForeignMessage.Parser), 138);
     private readonly pbc::MapField<int, global::Google.Protobuf.TestProtos.ForeignMessage> mapInt32ForeignMessage_ = new pbc::MapField<int, global::Google.Protobuf.TestProtos.ForeignMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.TestProtos.ForeignMessage> MapInt32ForeignMessage {
       get { return mapInt32ForeignMessage_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestMap);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestMap other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -434,6 +459,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= MapInt32Int32.GetHashCode();
@@ -460,11 +486,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -494,6 +522,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       mapInt32Int32_.WriteTo(ref output, _map_mapInt32Int32_codec);
       mapInt64Int64_.WriteTo(ref output, _map_mapInt64Int64_codec);
@@ -519,6 +548,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += mapInt32Int32_.CalculateSize(_map_mapInt32Int32_codec);
@@ -545,6 +575,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestMap other) {
       if (other == null) {
         return;
@@ -570,6 +601,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -655,6 +687,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -745,19 +778,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestMapSubmessage> _parser = new pb::MessageParser<TestMapSubmessage>(() => new TestMapSubmessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestMapSubmessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.MapUnittestProto3Reflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMapSubmessage() {
       OnConstruction();
     }
@@ -765,12 +802,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMapSubmessage(TestMapSubmessage other) : this() {
       testMap_ = other.testMap_ != null ? other.testMap_.Clone() : null;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMapSubmessage Clone() {
       return new TestMapSubmessage(this);
     }
@@ -779,6 +818,7 @@ namespace Google.Protobuf.TestProtos {
     public const int TestMapFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.TestMap testMap_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestMap TestMap {
       get { return testMap_; }
       set {
@@ -787,11 +827,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestMapSubmessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestMapSubmessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -804,6 +846,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (testMap_ != null) hash ^= TestMap.GetHashCode();
@@ -814,11 +857,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -835,6 +880,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (testMap_ != null) {
         output.WriteRawTag(10);
@@ -847,6 +893,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (testMap_ != null) {
@@ -859,6 +906,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestMapSubmessage other) {
       if (other == null) {
         return;
@@ -873,6 +921,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -897,6 +946,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -926,19 +976,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestMessageMap> _parser = new pb::MessageParser<TestMessageMap>(() => new TestMessageMap());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestMessageMap> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.MapUnittestProto3Reflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMessageMap() {
       OnConstruction();
     }
@@ -946,12 +1000,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMessageMap(TestMessageMap other) : this() {
       mapInt32Message_ = other.mapInt32Message_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMessageMap Clone() {
       return new TestMessageMap(this);
     }
@@ -962,16 +1018,19 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.TestProtos.TestAllTypes>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.TestProtos.TestAllTypes.Parser), 10);
     private readonly pbc::MapField<int, global::Google.Protobuf.TestProtos.TestAllTypes> mapInt32Message_ = new pbc::MapField<int, global::Google.Protobuf.TestProtos.TestAllTypes>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.TestProtos.TestAllTypes> MapInt32Message {
       get { return mapInt32Message_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestMessageMap);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestMessageMap other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -984,6 +1043,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= MapInt32Message.GetHashCode();
@@ -994,11 +1054,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1012,6 +1074,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       mapInt32Message_.WriteTo(ref output, _map_mapInt32Message_codec);
       if (_unknownFields != null) {
@@ -1021,6 +1084,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += mapInt32Message_.CalculateSize(_map_mapInt32Message_codec);
@@ -1031,6 +1095,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestMessageMap other) {
       if (other == null) {
         return;
@@ -1040,6 +1105,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1061,6 +1127,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1090,19 +1157,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestSameTypeMap> _parser = new pb::MessageParser<TestSameTypeMap>(() => new TestSameTypeMap());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestSameTypeMap> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.MapUnittestProto3Reflection.Descriptor.MessageTypes[3]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestSameTypeMap() {
       OnConstruction();
     }
@@ -1110,6 +1181,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestSameTypeMap(TestSameTypeMap other) : this() {
       map1_ = other.map1_.Clone();
       map2_ = other.map2_.Clone();
@@ -1117,6 +1189,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestSameTypeMap Clone() {
       return new TestSameTypeMap(this);
     }
@@ -1127,6 +1200,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForInt32(16, 0), 10);
     private readonly pbc::MapField<int, int> map1_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> Map1 {
       get { return map1_; }
     }
@@ -1137,16 +1211,19 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForInt32(16, 0), 18);
     private readonly pbc::MapField<int, int> map2_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> Map2 {
       get { return map2_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestSameTypeMap);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestSameTypeMap other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1160,6 +1237,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= Map1.GetHashCode();
@@ -1171,11 +1249,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1190,6 +1270,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       map1_.WriteTo(ref output, _map_map1_codec);
       map2_.WriteTo(ref output, _map_map2_codec);
@@ -1200,6 +1281,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += map1_.CalculateSize(_map_map1_codec);
@@ -1211,6 +1293,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestSameTypeMap other) {
       if (other == null) {
         return;
@@ -1221,6 +1304,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1246,6 +1330,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1276,19 +1361,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestArenaMap> _parser = new pb::MessageParser<TestArenaMap>(() => new TestArenaMap());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestArenaMap> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.MapUnittestProto3Reflection.Descriptor.MessageTypes[4]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestArenaMap() {
       OnConstruction();
     }
@@ -1296,6 +1385,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestArenaMap(TestArenaMap other) : this() {
       mapInt32Int32_ = other.mapInt32Int32_.Clone();
       mapInt64Int64_ = other.mapInt64Int64_.Clone();
@@ -1316,6 +1406,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestArenaMap Clone() {
       return new TestArenaMap(this);
     }
@@ -1326,6 +1417,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForInt32(16, 0), 10);
     private readonly pbc::MapField<int, int> mapInt32Int32_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapInt32Int32 {
       get { return mapInt32Int32_; }
     }
@@ -1336,6 +1428,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForInt64(8, 0L), pb::FieldCodec.ForInt64(16, 0L), 18);
     private readonly pbc::MapField<long, long> mapInt64Int64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapInt64Int64 {
       get { return mapInt64Int64_; }
     }
@@ -1346,6 +1439,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<uint, uint>.Codec(pb::FieldCodec.ForUInt32(8, 0), pb::FieldCodec.ForUInt32(16, 0), 26);
     private readonly pbc::MapField<uint, uint> mapUint32Uint32_ = new pbc::MapField<uint, uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<uint, uint> MapUint32Uint32 {
       get { return mapUint32Uint32_; }
     }
@@ -1356,6 +1450,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<ulong, ulong>.Codec(pb::FieldCodec.ForUInt64(8, 0UL), pb::FieldCodec.ForUInt64(16, 0UL), 34);
     private readonly pbc::MapField<ulong, ulong> mapUint64Uint64_ = new pbc::MapField<ulong, ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<ulong, ulong> MapUint64Uint64 {
       get { return mapUint64Uint64_; }
     }
@@ -1366,6 +1461,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForSInt32(8, 0), pb::FieldCodec.ForSInt32(16, 0), 42);
     private readonly pbc::MapField<int, int> mapSint32Sint32_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapSint32Sint32 {
       get { return mapSint32Sint32_; }
     }
@@ -1376,6 +1472,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForSInt64(8, 0L), pb::FieldCodec.ForSInt64(16, 0L), 50);
     private readonly pbc::MapField<long, long> mapSint64Sint64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapSint64Sint64 {
       get { return mapSint64Sint64_; }
     }
@@ -1386,6 +1483,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<uint, uint>.Codec(pb::FieldCodec.ForFixed32(13, 0), pb::FieldCodec.ForFixed32(21, 0), 58);
     private readonly pbc::MapField<uint, uint> mapFixed32Fixed32_ = new pbc::MapField<uint, uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<uint, uint> MapFixed32Fixed32 {
       get { return mapFixed32Fixed32_; }
     }
@@ -1396,6 +1494,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<ulong, ulong>.Codec(pb::FieldCodec.ForFixed64(9, 0UL), pb::FieldCodec.ForFixed64(17, 0UL), 66);
     private readonly pbc::MapField<ulong, ulong> mapFixed64Fixed64_ = new pbc::MapField<ulong, ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<ulong, ulong> MapFixed64Fixed64 {
       get { return mapFixed64Fixed64_; }
     }
@@ -1406,6 +1505,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForSFixed32(13, 0), pb::FieldCodec.ForSFixed32(21, 0), 74);
     private readonly pbc::MapField<int, int> mapSfixed32Sfixed32_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapSfixed32Sfixed32 {
       get { return mapSfixed32Sfixed32_; }
     }
@@ -1416,6 +1516,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForSFixed64(9, 0L), pb::FieldCodec.ForSFixed64(17, 0L), 82);
     private readonly pbc::MapField<long, long> mapSfixed64Sfixed64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapSfixed64Sfixed64 {
       get { return mapSfixed64Sfixed64_; }
     }
@@ -1426,6 +1527,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, float>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForFloat(21, 0F), 90);
     private readonly pbc::MapField<int, float> mapInt32Float_ = new pbc::MapField<int, float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, float> MapInt32Float {
       get { return mapInt32Float_; }
     }
@@ -1436,6 +1538,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, double>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForDouble(17, 0D), 98);
     private readonly pbc::MapField<int, double> mapInt32Double_ = new pbc::MapField<int, double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, double> MapInt32Double {
       get { return mapInt32Double_; }
     }
@@ -1446,6 +1549,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<bool, bool>.Codec(pb::FieldCodec.ForBool(8, false), pb::FieldCodec.ForBool(16, false), 106);
     private readonly pbc::MapField<bool, bool> mapBoolBool_ = new pbc::MapField<bool, bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<bool, bool> MapBoolBool {
       get { return mapBoolBool_; }
     }
@@ -1456,6 +1560,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.TestProtos.MapEnum>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForEnum(16, x => (int) x, x => (global::Google.Protobuf.TestProtos.MapEnum) x, global::Google.Protobuf.TestProtos.MapEnum.Foo), 114);
     private readonly pbc::MapField<int, global::Google.Protobuf.TestProtos.MapEnum> mapInt32Enum_ = new pbc::MapField<int, global::Google.Protobuf.TestProtos.MapEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.TestProtos.MapEnum> MapInt32Enum {
       get { return mapInt32Enum_; }
     }
@@ -1466,16 +1571,19 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.TestProtos.ForeignMessage>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.TestProtos.ForeignMessage.Parser), 122);
     private readonly pbc::MapField<int, global::Google.Protobuf.TestProtos.ForeignMessage> mapInt32ForeignMessage_ = new pbc::MapField<int, global::Google.Protobuf.TestProtos.ForeignMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.TestProtos.ForeignMessage> MapInt32ForeignMessage {
       get { return mapInt32ForeignMessage_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestArenaMap);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestArenaMap other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1502,6 +1610,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= MapInt32Int32.GetHashCode();
@@ -1526,11 +1635,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1558,6 +1669,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       mapInt32Int32_.WriteTo(ref output, _map_mapInt32Int32_codec);
       mapInt64Int64_.WriteTo(ref output, _map_mapInt64Int64_codec);
@@ -1581,6 +1693,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += mapInt32Int32_.CalculateSize(_map_mapInt32Int32_codec);
@@ -1605,6 +1718,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestArenaMap other) {
       if (other == null) {
         return;
@@ -1628,6 +1742,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1705,6 +1820,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1791,19 +1907,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<MessageContainingEnumCalledType> _parser = new pb::MessageParser<MessageContainingEnumCalledType>(() => new MessageContainingEnumCalledType());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MessageContainingEnumCalledType> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.MapUnittestProto3Reflection.Descriptor.MessageTypes[5]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MessageContainingEnumCalledType() {
       OnConstruction();
     }
@@ -1811,12 +1931,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MessageContainingEnumCalledType(MessageContainingEnumCalledType other) : this() {
       type_ = other.type_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MessageContainingEnumCalledType Clone() {
       return new MessageContainingEnumCalledType(this);
     }
@@ -1827,16 +1949,19 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.TestProtos.MessageContainingEnumCalledType>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.TestProtos.MessageContainingEnumCalledType.Parser), 10);
     private readonly pbc::MapField<int, global::Google.Protobuf.TestProtos.MessageContainingEnumCalledType> type_ = new pbc::MapField<int, global::Google.Protobuf.TestProtos.MessageContainingEnumCalledType>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.TestProtos.MessageContainingEnumCalledType> Type {
       get { return type_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MessageContainingEnumCalledType);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MessageContainingEnumCalledType other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1849,6 +1974,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= Type.GetHashCode();
@@ -1859,11 +1985,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1877,6 +2005,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       type_.WriteTo(ref output, _map_type_codec);
       if (_unknownFields != null) {
@@ -1886,6 +2015,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += type_.CalculateSize(_map_type_codec);
@@ -1896,6 +2026,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MessageContainingEnumCalledType other) {
       if (other == null) {
         return;
@@ -1905,6 +2036,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1926,6 +2058,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1945,6 +2078,7 @@ namespace Google.Protobuf.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the MessageContainingEnumCalledType message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum Type {
         [pbr::OriginalName("TYPE_FOO")] Foo = 0,
@@ -1966,19 +2100,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<MessageContainingMapCalledEntry> _parser = new pb::MessageParser<MessageContainingMapCalledEntry>(() => new MessageContainingMapCalledEntry());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MessageContainingMapCalledEntry> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.MapUnittestProto3Reflection.Descriptor.MessageTypes[6]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MessageContainingMapCalledEntry() {
       OnConstruction();
     }
@@ -1986,12 +2124,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MessageContainingMapCalledEntry(MessageContainingMapCalledEntry other) : this() {
       entry_ = other.entry_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MessageContainingMapCalledEntry Clone() {
       return new MessageContainingMapCalledEntry(this);
     }
@@ -2002,16 +2142,19 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForInt32(16, 0), 10);
     private readonly pbc::MapField<int, int> entry_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> Entry {
       get { return entry_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MessageContainingMapCalledEntry);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MessageContainingMapCalledEntry other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2024,6 +2167,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= Entry.GetHashCode();
@@ -2034,11 +2178,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2052,6 +2198,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       entry_.WriteTo(ref output, _map_entry_codec);
       if (_unknownFields != null) {
@@ -2061,6 +2208,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += entry_.CalculateSize(_map_entry_codec);
@@ -2071,6 +2219,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MessageContainingMapCalledEntry other) {
       if (other == null) {
         return;
@@ -2080,6 +2229,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2101,6 +2251,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto2.cs b/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto2.cs
index de1ece351a..48f9b80017 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto2.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto2.cs
@@ -256,19 +256,23 @@ namespace ProtobufTestMessages.Proto2 {
     private int _hasBits0;
     private int _hasBits1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestAllTypesProto2> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::ProtobufTestMessages.Proto2.TestMessagesProto2Reflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypesProto2() {
       OnConstruction();
     }
@@ -276,6 +280,7 @@ namespace ProtobufTestMessages.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypesProto2(TestAllTypesProto2 other) : this() {
       _hasBits0 = other._hasBits0;
       _hasBits1 = other._hasBits1;
@@ -423,6 +428,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypesProto2 Clone() {
       return new TestAllTypesProto2(this);
     }
@@ -436,6 +442,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// Singular
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalInt32 {
       get { if ((_hasBits0 & 1) != 0) { return optionalInt32_; } else { return OptionalInt32DefaultValue; } }
       set {
@@ -445,11 +452,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_int32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalInt32 {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "optional_int32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalInt32() {
       _hasBits0 &= ~1;
     }
@@ -460,6 +469,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private long optionalInt64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalInt64 {
       get { if ((_hasBits0 & 2) != 0) { return optionalInt64_; } else { return OptionalInt64DefaultValue; } }
       set {
@@ -469,11 +479,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_int64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalInt64 {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "optional_int64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalInt64() {
       _hasBits0 &= ~2;
     }
@@ -484,6 +496,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private uint optionalUint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OptionalUint32 {
       get { if ((_hasBits0 & 4) != 0) { return optionalUint32_; } else { return OptionalUint32DefaultValue; } }
       set {
@@ -493,11 +506,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_uint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalUint32 {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "optional_uint32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalUint32() {
       _hasBits0 &= ~4;
     }
@@ -508,6 +523,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private ulong optionalUint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong OptionalUint64 {
       get { if ((_hasBits0 & 8) != 0) { return optionalUint64_; } else { return OptionalUint64DefaultValue; } }
       set {
@@ -517,11 +533,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_uint64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalUint64 {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "optional_uint64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalUint64() {
       _hasBits0 &= ~8;
     }
@@ -532,6 +550,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int optionalSint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalSint32 {
       get { if ((_hasBits0 & 16) != 0) { return optionalSint32_; } else { return OptionalSint32DefaultValue; } }
       set {
@@ -541,11 +560,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_sint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSint32 {
       get { return (_hasBits0 & 16) != 0; }
     }
     /// <summary>Clears the value of the "optional_sint32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSint32() {
       _hasBits0 &= ~16;
     }
@@ -556,6 +577,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private long optionalSint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalSint64 {
       get { if ((_hasBits0 & 32) != 0) { return optionalSint64_; } else { return OptionalSint64DefaultValue; } }
       set {
@@ -565,11 +587,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_sint64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSint64 {
       get { return (_hasBits0 & 32) != 0; }
     }
     /// <summary>Clears the value of the "optional_sint64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSint64() {
       _hasBits0 &= ~32;
     }
@@ -580,6 +604,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private uint optionalFixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OptionalFixed32 {
       get { if ((_hasBits0 & 64) != 0) { return optionalFixed32_; } else { return OptionalFixed32DefaultValue; } }
       set {
@@ -589,11 +614,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_fixed32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalFixed32 {
       get { return (_hasBits0 & 64) != 0; }
     }
     /// <summary>Clears the value of the "optional_fixed32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalFixed32() {
       _hasBits0 &= ~64;
     }
@@ -604,6 +631,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private ulong optionalFixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong OptionalFixed64 {
       get { if ((_hasBits0 & 128) != 0) { return optionalFixed64_; } else { return OptionalFixed64DefaultValue; } }
       set {
@@ -613,11 +641,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_fixed64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalFixed64 {
       get { return (_hasBits0 & 128) != 0; }
     }
     /// <summary>Clears the value of the "optional_fixed64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalFixed64() {
       _hasBits0 &= ~128;
     }
@@ -628,6 +658,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int optionalSfixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalSfixed32 {
       get { if ((_hasBits0 & 256) != 0) { return optionalSfixed32_; } else { return OptionalSfixed32DefaultValue; } }
       set {
@@ -637,11 +668,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_sfixed32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSfixed32 {
       get { return (_hasBits0 & 256) != 0; }
     }
     /// <summary>Clears the value of the "optional_sfixed32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSfixed32() {
       _hasBits0 &= ~256;
     }
@@ -652,6 +685,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private long optionalSfixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalSfixed64 {
       get { if ((_hasBits0 & 512) != 0) { return optionalSfixed64_; } else { return OptionalSfixed64DefaultValue; } }
       set {
@@ -661,11 +695,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_sfixed64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSfixed64 {
       get { return (_hasBits0 & 512) != 0; }
     }
     /// <summary>Clears the value of the "optional_sfixed64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSfixed64() {
       _hasBits0 &= ~512;
     }
@@ -676,6 +712,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private float optionalFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float OptionalFloat {
       get { if ((_hasBits0 & 1024) != 0) { return optionalFloat_; } else { return OptionalFloatDefaultValue; } }
       set {
@@ -685,11 +722,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalFloat {
       get { return (_hasBits0 & 1024) != 0; }
     }
     /// <summary>Clears the value of the "optional_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalFloat() {
       _hasBits0 &= ~1024;
     }
@@ -700,6 +739,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private double optionalDouble_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double OptionalDouble {
       get { if ((_hasBits0 & 2048) != 0) { return optionalDouble_; } else { return OptionalDoubleDefaultValue; } }
       set {
@@ -709,11 +749,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_double" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalDouble {
       get { return (_hasBits0 & 2048) != 0; }
     }
     /// <summary>Clears the value of the "optional_double" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalDouble() {
       _hasBits0 &= ~2048;
     }
@@ -724,6 +766,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private bool optionalBool_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool OptionalBool {
       get { if ((_hasBits0 & 4096) != 0) { return optionalBool_; } else { return OptionalBoolDefaultValue; } }
       set {
@@ -733,11 +776,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_bool" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalBool {
       get { return (_hasBits0 & 4096) != 0; }
     }
     /// <summary>Clears the value of the "optional_bool" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalBool() {
       _hasBits0 &= ~4096;
     }
@@ -748,6 +793,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private string optionalString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalString {
       get { return optionalString_ ?? OptionalStringDefaultValue; }
       set {
@@ -756,11 +802,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalString {
       get { return optionalString_ != null; }
     }
     /// <summary>Clears the value of the "optional_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalString() {
       optionalString_ = null;
     }
@@ -771,6 +819,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private pb::ByteString optionalBytes_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OptionalBytes {
       get { return optionalBytes_ ?? OptionalBytesDefaultValue; }
       set {
@@ -779,11 +828,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalBytes {
       get { return optionalBytes_ != null; }
     }
     /// <summary>Clears the value of the "optional_bytes" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalBytes() {
       optionalBytes_ = null;
     }
@@ -792,6 +843,7 @@ namespace ProtobufTestMessages.Proto2 {
     public const int OptionalNestedMessageFieldNumber = 18;
     private global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage optionalNestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage OptionalNestedMessage {
       get { return optionalNestedMessage_; }
       set {
@@ -803,6 +855,7 @@ namespace ProtobufTestMessages.Proto2 {
     public const int OptionalForeignMessageFieldNumber = 19;
     private global::ProtobufTestMessages.Proto2.ForeignMessageProto2 optionalForeignMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto2.ForeignMessageProto2 OptionalForeignMessage {
       get { return optionalForeignMessage_; }
       set {
@@ -816,6 +869,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum optionalNestedEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum OptionalNestedEnum {
       get { if ((_hasBits0 & 8192) != 0) { return optionalNestedEnum_; } else { return OptionalNestedEnumDefaultValue; } }
       set {
@@ -825,11 +879,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_nested_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalNestedEnum {
       get { return (_hasBits0 & 8192) != 0; }
     }
     /// <summary>Clears the value of the "optional_nested_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalNestedEnum() {
       _hasBits0 &= ~8192;
     }
@@ -840,6 +896,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private global::ProtobufTestMessages.Proto2.ForeignEnumProto2 optionalForeignEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto2.ForeignEnumProto2 OptionalForeignEnum {
       get { if ((_hasBits0 & 16384) != 0) { return optionalForeignEnum_; } else { return OptionalForeignEnumDefaultValue; } }
       set {
@@ -849,11 +906,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_foreign_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalForeignEnum {
       get { return (_hasBits0 & 16384) != 0; }
     }
     /// <summary>Clears the value of the "optional_foreign_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalForeignEnum() {
       _hasBits0 &= ~16384;
     }
@@ -864,6 +923,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private string optionalStringPiece_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalStringPiece {
       get { return optionalStringPiece_ ?? OptionalStringPieceDefaultValue; }
       set {
@@ -872,11 +932,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_string_piece" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalStringPiece {
       get { return optionalStringPiece_ != null; }
     }
     /// <summary>Clears the value of the "optional_string_piece" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalStringPiece() {
       optionalStringPiece_ = null;
     }
@@ -887,6 +949,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private string optionalCord_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalCord {
       get { return optionalCord_ ?? OptionalCordDefaultValue; }
       set {
@@ -895,11 +958,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_cord" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalCord {
       get { return optionalCord_ != null; }
     }
     /// <summary>Clears the value of the "optional_cord" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalCord() {
       optionalCord_ = null;
     }
@@ -908,6 +973,7 @@ namespace ProtobufTestMessages.Proto2 {
     public const int RecursiveMessageFieldNumber = 27;
     private global::ProtobufTestMessages.Proto2.TestAllTypesProto2 recursiveMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto2.TestAllTypesProto2 RecursiveMessage {
       get { return recursiveMessage_; }
       set {
@@ -924,6 +990,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// Repeated
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedInt32 {
       get { return repeatedInt32_; }
     }
@@ -934,6 +1001,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForInt64(256);
     private readonly pbc::RepeatedField<long> repeatedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedInt64 {
       get { return repeatedInt64_; }
     }
@@ -944,6 +1012,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForUInt32(264);
     private readonly pbc::RepeatedField<uint> repeatedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> RepeatedUint32 {
       get { return repeatedUint32_; }
     }
@@ -954,6 +1023,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForUInt64(272);
     private readonly pbc::RepeatedField<ulong> repeatedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedUint64 {
       get { return repeatedUint64_; }
     }
@@ -964,6 +1034,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSInt32(280);
     private readonly pbc::RepeatedField<int> repeatedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedSint32 {
       get { return repeatedSint32_; }
     }
@@ -974,6 +1045,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSInt64(288);
     private readonly pbc::RepeatedField<long> repeatedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedSint64 {
       get { return repeatedSint64_; }
     }
@@ -984,6 +1056,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForFixed32(301);
     private readonly pbc::RepeatedField<uint> repeatedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> RepeatedFixed32 {
       get { return repeatedFixed32_; }
     }
@@ -994,6 +1067,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForFixed64(305);
     private readonly pbc::RepeatedField<ulong> repeatedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedFixed64 {
       get { return repeatedFixed64_; }
     }
@@ -1004,6 +1078,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSFixed32(317);
     private readonly pbc::RepeatedField<int> repeatedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedSfixed32 {
       get { return repeatedSfixed32_; }
     }
@@ -1014,6 +1089,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSFixed64(321);
     private readonly pbc::RepeatedField<long> repeatedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedSfixed64 {
       get { return repeatedSfixed64_; }
     }
@@ -1024,6 +1100,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForFloat(333);
     private readonly pbc::RepeatedField<float> repeatedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> RepeatedFloat {
       get { return repeatedFloat_; }
     }
@@ -1034,6 +1111,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForDouble(337);
     private readonly pbc::RepeatedField<double> repeatedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> RepeatedDouble {
       get { return repeatedDouble_; }
     }
@@ -1044,6 +1122,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForBool(344);
     private readonly pbc::RepeatedField<bool> repeatedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> RepeatedBool {
       get { return repeatedBool_; }
     }
@@ -1054,6 +1133,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForString(354);
     private readonly pbc::RepeatedField<string> repeatedString_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedString {
       get { return repeatedString_; }
     }
@@ -1064,6 +1144,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForBytes(362);
     private readonly pbc::RepeatedField<pb::ByteString> repeatedBytes_ = new pbc::RepeatedField<pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<pb::ByteString> RepeatedBytes {
       get { return repeatedBytes_; }
     }
@@ -1074,6 +1155,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForMessage(386, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage.Parser);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage> repeatedNestedMessage_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage> RepeatedNestedMessage {
       get { return repeatedNestedMessage_; }
     }
@@ -1084,6 +1166,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForMessage(394, global::ProtobufTestMessages.Proto2.ForeignMessageProto2.Parser);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto2.ForeignMessageProto2> repeatedForeignMessage_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto2.ForeignMessageProto2>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto2.ForeignMessageProto2> RepeatedForeignMessage {
       get { return repeatedForeignMessage_; }
     }
@@ -1094,6 +1177,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForEnum(408, x => (int) x, x => (global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum) x);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum> repeatedNestedEnum_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum> RepeatedNestedEnum {
       get { return repeatedNestedEnum_; }
     }
@@ -1104,6 +1188,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForEnum(416, x => (int) x, x => (global::ProtobufTestMessages.Proto2.ForeignEnumProto2) x);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto2.ForeignEnumProto2> repeatedForeignEnum_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto2.ForeignEnumProto2>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto2.ForeignEnumProto2> RepeatedForeignEnum {
       get { return repeatedForeignEnum_; }
     }
@@ -1114,6 +1199,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForString(434);
     private readonly pbc::RepeatedField<string> repeatedStringPiece_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedStringPiece {
       get { return repeatedStringPiece_; }
     }
@@ -1124,6 +1210,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForString(442);
     private readonly pbc::RepeatedField<string> repeatedCord_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedCord {
       get { return repeatedCord_; }
     }
@@ -1137,6 +1224,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// Packed
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedInt32 {
       get { return packedInt32_; }
     }
@@ -1147,6 +1235,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForInt64(610);
     private readonly pbc::RepeatedField<long> packedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedInt64 {
       get { return packedInt64_; }
     }
@@ -1157,6 +1246,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForUInt32(618);
     private readonly pbc::RepeatedField<uint> packedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> PackedUint32 {
       get { return packedUint32_; }
     }
@@ -1167,6 +1257,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForUInt64(626);
     private readonly pbc::RepeatedField<ulong> packedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> PackedUint64 {
       get { return packedUint64_; }
     }
@@ -1177,6 +1268,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSInt32(634);
     private readonly pbc::RepeatedField<int> packedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedSint32 {
       get { return packedSint32_; }
     }
@@ -1187,6 +1279,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSInt64(642);
     private readonly pbc::RepeatedField<long> packedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedSint64 {
       get { return packedSint64_; }
     }
@@ -1197,6 +1290,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForFixed32(650);
     private readonly pbc::RepeatedField<uint> packedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> PackedFixed32 {
       get { return packedFixed32_; }
     }
@@ -1207,6 +1301,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForFixed64(658);
     private readonly pbc::RepeatedField<ulong> packedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> PackedFixed64 {
       get { return packedFixed64_; }
     }
@@ -1217,6 +1312,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSFixed32(666);
     private readonly pbc::RepeatedField<int> packedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedSfixed32 {
       get { return packedSfixed32_; }
     }
@@ -1227,6 +1323,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSFixed64(674);
     private readonly pbc::RepeatedField<long> packedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedSfixed64 {
       get { return packedSfixed64_; }
     }
@@ -1237,6 +1334,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForFloat(682);
     private readonly pbc::RepeatedField<float> packedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> PackedFloat {
       get { return packedFloat_; }
     }
@@ -1247,6 +1345,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForDouble(690);
     private readonly pbc::RepeatedField<double> packedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> PackedDouble {
       get { return packedDouble_; }
     }
@@ -1257,6 +1356,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForBool(698);
     private readonly pbc::RepeatedField<bool> packedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> PackedBool {
       get { return packedBool_; }
     }
@@ -1267,6 +1367,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForEnum(706, x => (int) x, x => (global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum) x);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum> packedNestedEnum_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum> PackedNestedEnum {
       get { return packedNestedEnum_; }
     }
@@ -1280,6 +1381,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// Unpacked
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedInt32 {
       get { return unpackedInt32_; }
     }
@@ -1290,6 +1392,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForInt64(720);
     private readonly pbc::RepeatedField<long> unpackedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedInt64 {
       get { return unpackedInt64_; }
     }
@@ -1300,6 +1403,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForUInt32(728);
     private readonly pbc::RepeatedField<uint> unpackedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> UnpackedUint32 {
       get { return unpackedUint32_; }
     }
@@ -1310,6 +1414,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForUInt64(736);
     private readonly pbc::RepeatedField<ulong> unpackedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> UnpackedUint64 {
       get { return unpackedUint64_; }
     }
@@ -1320,6 +1425,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSInt32(744);
     private readonly pbc::RepeatedField<int> unpackedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedSint32 {
       get { return unpackedSint32_; }
     }
@@ -1330,6 +1436,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSInt64(752);
     private readonly pbc::RepeatedField<long> unpackedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedSint64 {
       get { return unpackedSint64_; }
     }
@@ -1340,6 +1447,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForFixed32(765);
     private readonly pbc::RepeatedField<uint> unpackedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> UnpackedFixed32 {
       get { return unpackedFixed32_; }
     }
@@ -1350,6 +1458,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForFixed64(769);
     private readonly pbc::RepeatedField<ulong> unpackedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> UnpackedFixed64 {
       get { return unpackedFixed64_; }
     }
@@ -1360,6 +1469,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSFixed32(781);
     private readonly pbc::RepeatedField<int> unpackedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedSfixed32 {
       get { return unpackedSfixed32_; }
     }
@@ -1370,6 +1480,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForSFixed64(785);
     private readonly pbc::RepeatedField<long> unpackedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedSfixed64 {
       get { return unpackedSfixed64_; }
     }
@@ -1380,6 +1491,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForFloat(797);
     private readonly pbc::RepeatedField<float> unpackedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> UnpackedFloat {
       get { return unpackedFloat_; }
     }
@@ -1390,6 +1502,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForDouble(801);
     private readonly pbc::RepeatedField<double> unpackedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> UnpackedDouble {
       get { return unpackedDouble_; }
     }
@@ -1400,6 +1513,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForBool(808);
     private readonly pbc::RepeatedField<bool> unpackedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> UnpackedBool {
       get { return unpackedBool_; }
     }
@@ -1410,6 +1524,7 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForEnum(816, x => (int) x, x => (global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum) x);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum> unpackedNestedEnum_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum> UnpackedNestedEnum {
       get { return unpackedNestedEnum_; }
     }
@@ -1423,6 +1538,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// Map
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapInt32Int32 {
       get { return mapInt32Int32_; }
     }
@@ -1433,6 +1549,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForInt64(8, 0L), pb::FieldCodec.ForInt64(16, 0L), 458);
     private readonly pbc::MapField<long, long> mapInt64Int64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapInt64Int64 {
       get { return mapInt64Int64_; }
     }
@@ -1443,6 +1560,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<uint, uint>.Codec(pb::FieldCodec.ForUInt32(8, 0), pb::FieldCodec.ForUInt32(16, 0), 466);
     private readonly pbc::MapField<uint, uint> mapUint32Uint32_ = new pbc::MapField<uint, uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<uint, uint> MapUint32Uint32 {
       get { return mapUint32Uint32_; }
     }
@@ -1453,6 +1571,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<ulong, ulong>.Codec(pb::FieldCodec.ForUInt64(8, 0UL), pb::FieldCodec.ForUInt64(16, 0UL), 474);
     private readonly pbc::MapField<ulong, ulong> mapUint64Uint64_ = new pbc::MapField<ulong, ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<ulong, ulong> MapUint64Uint64 {
       get { return mapUint64Uint64_; }
     }
@@ -1463,6 +1582,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForSInt32(8, 0), pb::FieldCodec.ForSInt32(16, 0), 482);
     private readonly pbc::MapField<int, int> mapSint32Sint32_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapSint32Sint32 {
       get { return mapSint32Sint32_; }
     }
@@ -1473,6 +1593,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForSInt64(8, 0L), pb::FieldCodec.ForSInt64(16, 0L), 490);
     private readonly pbc::MapField<long, long> mapSint64Sint64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapSint64Sint64 {
       get { return mapSint64Sint64_; }
     }
@@ -1483,6 +1604,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<uint, uint>.Codec(pb::FieldCodec.ForFixed32(13, 0), pb::FieldCodec.ForFixed32(21, 0), 498);
     private readonly pbc::MapField<uint, uint> mapFixed32Fixed32_ = new pbc::MapField<uint, uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<uint, uint> MapFixed32Fixed32 {
       get { return mapFixed32Fixed32_; }
     }
@@ -1493,6 +1615,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<ulong, ulong>.Codec(pb::FieldCodec.ForFixed64(9, 0UL), pb::FieldCodec.ForFixed64(17, 0UL), 506);
     private readonly pbc::MapField<ulong, ulong> mapFixed64Fixed64_ = new pbc::MapField<ulong, ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<ulong, ulong> MapFixed64Fixed64 {
       get { return mapFixed64Fixed64_; }
     }
@@ -1503,6 +1626,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForSFixed32(13, 0), pb::FieldCodec.ForSFixed32(21, 0), 514);
     private readonly pbc::MapField<int, int> mapSfixed32Sfixed32_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapSfixed32Sfixed32 {
       get { return mapSfixed32Sfixed32_; }
     }
@@ -1513,6 +1637,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForSFixed64(9, 0L), pb::FieldCodec.ForSFixed64(17, 0L), 522);
     private readonly pbc::MapField<long, long> mapSfixed64Sfixed64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapSfixed64Sfixed64 {
       get { return mapSfixed64Sfixed64_; }
     }
@@ -1523,6 +1648,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<int, float>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForFloat(21, 0F), 530);
     private readonly pbc::MapField<int, float> mapInt32Float_ = new pbc::MapField<int, float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, float> MapInt32Float {
       get { return mapInt32Float_; }
     }
@@ -1533,6 +1659,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<int, double>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForDouble(17, 0D), 538);
     private readonly pbc::MapField<int, double> mapInt32Double_ = new pbc::MapField<int, double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, double> MapInt32Double {
       get { return mapInt32Double_; }
     }
@@ -1543,6 +1670,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<bool, bool>.Codec(pb::FieldCodec.ForBool(8, false), pb::FieldCodec.ForBool(16, false), 546);
     private readonly pbc::MapField<bool, bool> mapBoolBool_ = new pbc::MapField<bool, bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<bool, bool> MapBoolBool {
       get { return mapBoolBool_; }
     }
@@ -1553,6 +1681,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<string, string>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForString(18, ""), 554);
     private readonly pbc::MapField<string, string> mapStringString_ = new pbc::MapField<string, string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, string> MapStringString {
       get { return mapStringString_; }
     }
@@ -1563,6 +1692,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<string, pb::ByteString>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForBytes(18, pb::ByteString.Empty), 562);
     private readonly pbc::MapField<string, pb::ByteString> mapStringBytes_ = new pbc::MapField<string, pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, pb::ByteString> MapStringBytes {
       get { return mapStringBytes_; }
     }
@@ -1573,6 +1703,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<string, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForMessage(18, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage.Parser), 570);
     private readonly pbc::MapField<string, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage> mapStringNestedMessage_ = new pbc::MapField<string, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage> MapStringNestedMessage {
       get { return mapStringNestedMessage_; }
     }
@@ -1583,6 +1714,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<string, global::ProtobufTestMessages.Proto2.ForeignMessageProto2>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForMessage(18, global::ProtobufTestMessages.Proto2.ForeignMessageProto2.Parser), 578);
     private readonly pbc::MapField<string, global::ProtobufTestMessages.Proto2.ForeignMessageProto2> mapStringForeignMessage_ = new pbc::MapField<string, global::ProtobufTestMessages.Proto2.ForeignMessageProto2>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, global::ProtobufTestMessages.Proto2.ForeignMessageProto2> MapStringForeignMessage {
       get { return mapStringForeignMessage_; }
     }
@@ -1593,6 +1725,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<string, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForEnum(16, x => (int) x, x => (global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum) x, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum.Foo), 586);
     private readonly pbc::MapField<string, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum> mapStringNestedEnum_ = new pbc::MapField<string, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum> MapStringNestedEnum {
       get { return mapStringNestedEnum_; }
     }
@@ -1603,6 +1736,7 @@ namespace ProtobufTestMessages.Proto2 {
         = new pbc::MapField<string, global::ProtobufTestMessages.Proto2.ForeignEnumProto2>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForEnum(16, x => (int) x, x => (global::ProtobufTestMessages.Proto2.ForeignEnumProto2) x, global::ProtobufTestMessages.Proto2.ForeignEnumProto2.ForeignFoo), 594);
     private readonly pbc::MapField<string, global::ProtobufTestMessages.Proto2.ForeignEnumProto2> mapStringForeignEnum_ = new pbc::MapField<string, global::ProtobufTestMessages.Proto2.ForeignEnumProto2>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, global::ProtobufTestMessages.Proto2.ForeignEnumProto2> MapStringForeignEnum {
       get { return mapStringForeignEnum_; }
     }
@@ -1610,6 +1744,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// <summary>Field number for the "oneof_uint32" field.</summary>
     public const int OneofUint32FieldNumber = 111;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OneofUint32 {
       get { return HasOneofUint32 ? (uint) oneofField_ : 0; }
       set {
@@ -1619,11 +1754,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "oneof_uint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofUint32 {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofUint32; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_uint32" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofUint32() {
       if (HasOneofUint32) {
         ClearOneofField();
@@ -1633,6 +1770,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// <summary>Field number for the "oneof_nested_message" field.</summary>
     public const int OneofNestedMessageFieldNumber = 112;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage OneofNestedMessage {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofNestedMessage ? (global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedMessage) oneofField_ : null; }
       set {
@@ -1644,6 +1782,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// <summary>Field number for the "oneof_string" field.</summary>
     public const int OneofStringFieldNumber = 113;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OneofString {
       get { return HasOneofString ? (string) oneofField_ : ""; }
       set {
@@ -1653,11 +1792,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "oneof_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofString {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofString; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_string" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofString() {
       if (HasOneofString) {
         ClearOneofField();
@@ -1667,6 +1808,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// <summary>Field number for the "oneof_bytes" field.</summary>
     public const int OneofBytesFieldNumber = 114;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OneofBytes {
       get { return HasOneofBytes ? (pb::ByteString) oneofField_ : pb::ByteString.Empty; }
       set {
@@ -1676,11 +1818,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "oneof_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofBytes {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofBytes; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_bytes" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofBytes() {
       if (HasOneofBytes) {
         ClearOneofField();
@@ -1690,6 +1834,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// <summary>Field number for the "oneof_bool" field.</summary>
     public const int OneofBoolFieldNumber = 115;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool OneofBool {
       get { return HasOneofBool ? (bool) oneofField_ : false; }
       set {
@@ -1699,11 +1844,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "oneof_bool" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofBool {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofBool; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_bool" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofBool() {
       if (HasOneofBool) {
         ClearOneofField();
@@ -1713,6 +1860,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// <summary>Field number for the "oneof_uint64" field.</summary>
     public const int OneofUint64FieldNumber = 116;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong OneofUint64 {
       get { return HasOneofUint64 ? (ulong) oneofField_ : 0UL; }
       set {
@@ -1722,11 +1870,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "oneof_uint64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofUint64 {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofUint64; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_uint64" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofUint64() {
       if (HasOneofUint64) {
         ClearOneofField();
@@ -1736,6 +1886,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// <summary>Field number for the "oneof_float" field.</summary>
     public const int OneofFloatFieldNumber = 117;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float OneofFloat {
       get { return HasOneofFloat ? (float) oneofField_ : 0F; }
       set {
@@ -1745,11 +1896,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "oneof_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofFloat {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofFloat; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_float" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofFloat() {
       if (HasOneofFloat) {
         ClearOneofField();
@@ -1759,6 +1912,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// <summary>Field number for the "oneof_double" field.</summary>
     public const int OneofDoubleFieldNumber = 118;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double OneofDouble {
       get { return HasOneofDouble ? (double) oneofField_ : 0D; }
       set {
@@ -1768,11 +1922,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "oneof_double" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofDouble {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofDouble; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_double" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofDouble() {
       if (HasOneofDouble) {
         ClearOneofField();
@@ -1782,6 +1938,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// <summary>Field number for the "oneof_enum" field.</summary>
     public const int OneofEnumFieldNumber = 119;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum OneofEnum {
       get { return HasOneofEnum ? (global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum) oneofField_ : global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.NestedEnum.Foo; }
       set {
@@ -1791,11 +1948,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "oneof_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofEnum {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofEnum; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_enum" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofEnum() {
       if (HasOneofEnum) {
         ClearOneofField();
@@ -1806,6 +1965,7 @@ namespace ProtobufTestMessages.Proto2 {
     public const int DataFieldNumber = 201;
     private global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.Data data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.Data Data {
       get { return data_; }
       set {
@@ -1814,11 +1974,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the data field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasData {
       get { return data_ != null; }
     }
     /// <summary>Clears the value of the data field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearData() {
       data_ = null;
     }
@@ -1833,6 +1995,7 @@ namespace ProtobufTestMessages.Proto2 {
     /// (protobuf says names can be any valid C/C++ identifier.)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Fieldname1 {
       get { if ((_hasBits0 & 32768) != 0) { return fieldname1_; } else { return Fieldname1DefaultValue; } }
       set {
@@ -1842,11 +2005,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "fieldname1" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldname1 {
       get { return (_hasBits0 & 32768) != 0; }
     }
     /// <summary>Clears the value of the "fieldname1" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldname1() {
       _hasBits0 &= ~32768;
     }
@@ -1857,6 +2022,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fieldName2_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName2 {
       get { if ((_hasBits0 & 65536) != 0) { return fieldName2_; } else { return FieldName2DefaultValue; } }
       set {
@@ -1866,11 +2032,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "field_name2" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName2 {
       get { return (_hasBits0 & 65536) != 0; }
     }
     /// <summary>Clears the value of the "field_name2" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName2() {
       _hasBits0 &= ~65536;
     }
@@ -1881,6 +2049,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int FieldName3_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName3 {
       get { if ((_hasBits0 & 131072) != 0) { return FieldName3_; } else { return FieldName3DefaultValue; } }
       set {
@@ -1890,11 +2059,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "_field_name3" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName3 {
       get { return (_hasBits0 & 131072) != 0; }
     }
     /// <summary>Clears the value of the "_field_name3" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName3() {
       _hasBits0 &= ~131072;
     }
@@ -1905,6 +2076,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fieldName4_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName4 {
       get { if ((_hasBits0 & 262144) != 0) { return fieldName4_; } else { return FieldName4DefaultValue; } }
       set {
@@ -1914,11 +2086,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "field__name4_" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName4 {
       get { return (_hasBits0 & 262144) != 0; }
     }
     /// <summary>Clears the value of the "field__name4_" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName4() {
       _hasBits0 &= ~262144;
     }
@@ -1929,6 +2103,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int field0Name5_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field0Name5 {
       get { if ((_hasBits0 & 524288) != 0) { return field0Name5_; } else { return Field0Name5DefaultValue; } }
       set {
@@ -1938,11 +2113,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "field0name5" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField0Name5 {
       get { return (_hasBits0 & 524288) != 0; }
     }
     /// <summary>Clears the value of the "field0name5" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField0Name5() {
       _hasBits0 &= ~524288;
     }
@@ -1953,6 +2130,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int field0Name6_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field0Name6 {
       get { if ((_hasBits0 & 1048576) != 0) { return field0Name6_; } else { return Field0Name6DefaultValue; } }
       set {
@@ -1962,11 +2140,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "field_0_name6" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField0Name6 {
       get { return (_hasBits0 & 1048576) != 0; }
     }
     /// <summary>Clears the value of the "field_0_name6" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField0Name6() {
       _hasBits0 &= ~1048576;
     }
@@ -1977,6 +2157,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fieldName7_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName7 {
       get { if ((_hasBits0 & 2097152) != 0) { return fieldName7_; } else { return FieldName7DefaultValue; } }
       set {
@@ -1986,11 +2167,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "fieldName7" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName7 {
       get { return (_hasBits0 & 2097152) != 0; }
     }
     /// <summary>Clears the value of the "fieldName7" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName7() {
       _hasBits0 &= ~2097152;
     }
@@ -2001,6 +2184,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fieldName8_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName8 {
       get { if ((_hasBits0 & 4194304) != 0) { return fieldName8_; } else { return FieldName8DefaultValue; } }
       set {
@@ -2010,11 +2194,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "FieldName8" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName8 {
       get { return (_hasBits0 & 4194304) != 0; }
     }
     /// <summary>Clears the value of the "FieldName8" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName8() {
       _hasBits0 &= ~4194304;
     }
@@ -2025,6 +2211,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fieldName9_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName9 {
       get { if ((_hasBits0 & 8388608) != 0) { return fieldName9_; } else { return FieldName9DefaultValue; } }
       set {
@@ -2034,11 +2221,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "field_Name9" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName9 {
       get { return (_hasBits0 & 8388608) != 0; }
     }
     /// <summary>Clears the value of the "field_Name9" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName9() {
       _hasBits0 &= ~8388608;
     }
@@ -2049,6 +2238,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fieldName10_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName10 {
       get { if ((_hasBits0 & 16777216) != 0) { return fieldName10_; } else { return FieldName10DefaultValue; } }
       set {
@@ -2058,11 +2248,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "Field_Name10" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName10 {
       get { return (_hasBits0 & 16777216) != 0; }
     }
     /// <summary>Clears the value of the "Field_Name10" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName10() {
       _hasBits0 &= ~16777216;
     }
@@ -2073,6 +2265,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fIELDNAME11_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FIELDNAME11 {
       get { if ((_hasBits0 & 33554432) != 0) { return fIELDNAME11_; } else { return FIELDNAME11DefaultValue; } }
       set {
@@ -2082,11 +2275,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "FIELD_NAME11" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFIELDNAME11 {
       get { return (_hasBits0 & 33554432) != 0; }
     }
     /// <summary>Clears the value of the "FIELD_NAME11" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFIELDNAME11() {
       _hasBits0 &= ~33554432;
     }
@@ -2097,6 +2292,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fIELDName12_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FIELDName12 {
       get { if ((_hasBits0 & 67108864) != 0) { return fIELDName12_; } else { return FIELDName12DefaultValue; } }
       set {
@@ -2106,11 +2302,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "FIELD_name12" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFIELDName12 {
       get { return (_hasBits0 & 67108864) != 0; }
     }
     /// <summary>Clears the value of the "FIELD_name12" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFIELDName12() {
       _hasBits0 &= ~67108864;
     }
@@ -2121,6 +2319,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int FieldName13_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName13 {
       get { if ((_hasBits0 & 134217728) != 0) { return FieldName13_; } else { return FieldName13DefaultValue; } }
       set {
@@ -2130,11 +2329,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "__field_name13" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName13 {
       get { return (_hasBits0 & 134217728) != 0; }
     }
     /// <summary>Clears the value of the "__field_name13" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName13() {
       _hasBits0 &= ~134217728;
     }
@@ -2145,6 +2346,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int FieldName14_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName14 {
       get { if ((_hasBits0 & 268435456) != 0) { return FieldName14_; } else { return FieldName14DefaultValue; } }
       set {
@@ -2154,11 +2356,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "__Field_name14" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName14 {
       get { return (_hasBits0 & 268435456) != 0; }
     }
     /// <summary>Clears the value of the "__Field_name14" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName14() {
       _hasBits0 &= ~268435456;
     }
@@ -2169,6 +2373,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fieldName15_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName15 {
       get { if ((_hasBits0 & 536870912) != 0) { return fieldName15_; } else { return FieldName15DefaultValue; } }
       set {
@@ -2178,11 +2383,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "field__name15" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName15 {
       get { return (_hasBits0 & 536870912) != 0; }
     }
     /// <summary>Clears the value of the "field__name15" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName15() {
       _hasBits0 &= ~536870912;
     }
@@ -2193,6 +2400,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fieldName16_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName16 {
       get { if ((_hasBits0 & 1073741824) != 0) { return fieldName16_; } else { return FieldName16DefaultValue; } }
       set {
@@ -2202,11 +2410,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "field__Name16" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName16 {
       get { return (_hasBits0 & 1073741824) != 0; }
     }
     /// <summary>Clears the value of the "field__Name16" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName16() {
       _hasBits0 &= ~1073741824;
     }
@@ -2217,6 +2427,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fieldName17_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName17 {
       get { if ((_hasBits0 & -2147483648) != 0) { return fieldName17_; } else { return FieldName17DefaultValue; } }
       set {
@@ -2226,11 +2437,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "field_name17__" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName17 {
       get { return (_hasBits0 & -2147483648) != 0; }
     }
     /// <summary>Clears the value of the "field_name17__" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName17() {
       _hasBits0 &= ~-2147483648;
     }
@@ -2241,6 +2454,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int fieldName18_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName18 {
       get { if ((_hasBits1 & 1) != 0) { return fieldName18_; } else { return FieldName18DefaultValue; } }
       set {
@@ -2250,11 +2464,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "Field_name18__" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName18 {
       get { return (_hasBits1 & 1) != 0; }
     }
     /// <summary>Clears the value of the "Field_name18__" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName18() {
       _hasBits1 &= ~1;
     }
@@ -2275,22 +2491,26 @@ namespace ProtobufTestMessages.Proto2 {
     }
     private OneofFieldOneofCase oneofFieldCase_ = OneofFieldOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofFieldOneofCase OneofFieldCase {
       get { return oneofFieldCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofField() {
       oneofFieldCase_ = OneofFieldOneofCase.None;
       oneofField_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestAllTypesProto2);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestAllTypesProto2 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2424,6 +2644,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasOptionalInt32) hash ^= OptionalInt32.GetHashCode();
@@ -2555,11 +2776,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2844,6 +3067,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasOptionalInt32) {
         output.WriteRawTag(8);
@@ -3124,6 +3348,7 @@ namespace ProtobufTestMessages.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasOptionalInt32) {
@@ -3354,6 +3579,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestAllTypesProto2 other) {
       if (other == null) {
         return;
@@ -3599,6 +3825,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -4151,6 +4378,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -4723,6 +4951,7 @@ namespace ProtobufTestMessages.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestAllTypesProto2 message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum NestedEnum {
         [pbr::OriginalName("FOO")] Foo = 0,
@@ -4743,19 +4972,23 @@ namespace ProtobufTestMessages.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -4763,6 +4996,7 @@ namespace ProtobufTestMessages.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -4771,6 +5005,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -4781,6 +5016,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -4790,11 +5026,13 @@ namespace ProtobufTestMessages.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
@@ -4803,6 +5041,7 @@ namespace ProtobufTestMessages.Proto2 {
         public const int CorecursiveFieldNumber = 2;
         private global::ProtobufTestMessages.Proto2.TestAllTypesProto2 corecursive_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public global::ProtobufTestMessages.Proto2.TestAllTypesProto2 Corecursive {
           get { return corecursive_; }
           set {
@@ -4811,11 +5050,13 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -4829,6 +5070,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -4840,11 +5082,13 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -4865,6 +5109,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(8);
@@ -4881,6 +5126,7 @@ namespace ProtobufTestMessages.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -4896,6 +5142,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -4913,6 +5160,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -4941,6 +5189,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -4978,19 +5227,23 @@ namespace ProtobufTestMessages.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<Data> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Descriptor.NestedTypes[20]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Data() {
           OnConstruction();
         }
@@ -4998,6 +5251,7 @@ namespace ProtobufTestMessages.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Data(Data other) : this() {
           _hasBits0 = other._hasBits0;
           groupInt32_ = other.groupInt32_;
@@ -5006,6 +5260,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Data Clone() {
           return new Data(this);
         }
@@ -5016,6 +5271,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         private int groupInt32_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int GroupInt32 {
           get { if ((_hasBits0 & 1) != 0) { return groupInt32_; } else { return GroupInt32DefaultValue; } }
           set {
@@ -5025,11 +5281,13 @@ namespace ProtobufTestMessages.Proto2 {
         }
         /// <summary>Gets whether the "group_int32" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasGroupInt32 {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "group_int32" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearGroupInt32() {
           _hasBits0 &= ~1;
         }
@@ -5040,6 +5298,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         private uint groupUint32_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public uint GroupUint32 {
           get { if ((_hasBits0 & 2) != 0) { return groupUint32_; } else { return GroupUint32DefaultValue; } }
           set {
@@ -5049,21 +5308,25 @@ namespace ProtobufTestMessages.Proto2 {
         }
         /// <summary>Gets whether the "group_uint32" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasGroupUint32 {
           get { return (_hasBits0 & 2) != 0; }
         }
         /// <summary>Clears the value of the "group_uint32" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearGroupUint32() {
           _hasBits0 &= ~2;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as Data);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(Data other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -5077,6 +5340,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasGroupInt32) hash ^= GroupInt32.GetHashCode();
@@ -5088,11 +5352,13 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -5113,6 +5379,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasGroupInt32) {
             output.WriteRawTag(208, 12);
@@ -5129,6 +5396,7 @@ namespace ProtobufTestMessages.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasGroupInt32) {
@@ -5144,6 +5412,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(Data other) {
           if (other == null) {
             return;
@@ -5158,6 +5427,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -5185,6 +5455,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -5222,19 +5493,23 @@ namespace ProtobufTestMessages.Proto2 {
         private pb::ExtensionSet<MessageSetCorrect> _extensions;
         private pb::ExtensionSet<MessageSetCorrect> _Extensions { get { return _extensions; } }
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<MessageSetCorrect> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Descriptor.NestedTypes[21]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public MessageSetCorrect() {
           OnConstruction();
         }
@@ -5242,22 +5517,26 @@ namespace ProtobufTestMessages.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public MessageSetCorrect(MessageSetCorrect other) : this() {
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
           _extensions = pb::ExtensionSet.Clone(other._extensions);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public MessageSetCorrect Clone() {
           return new MessageSetCorrect(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as MessageSetCorrect);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(MessageSetCorrect other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -5272,6 +5551,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (_extensions != null) {
@@ -5284,11 +5564,13 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -5304,6 +5586,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (_extensions != null) {
             _extensions.WriteTo(ref output);
@@ -5315,6 +5598,7 @@ namespace ProtobufTestMessages.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (_extensions != null) {
@@ -5327,6 +5611,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(MessageSetCorrect other) {
           if (other == null) {
             return;
@@ -5336,6 +5621,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -5355,6 +5641,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -5401,19 +5688,23 @@ namespace ProtobufTestMessages.Proto2 {
         private static readonly pb::MessageParser<MessageSetCorrectExtension1> _parser = new pb::MessageParser<MessageSetCorrectExtension1>(() => new MessageSetCorrectExtension1());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<MessageSetCorrectExtension1> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Descriptor.NestedTypes[22]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public MessageSetCorrectExtension1() {
           OnConstruction();
         }
@@ -5421,12 +5712,14 @@ namespace ProtobufTestMessages.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public MessageSetCorrectExtension1(MessageSetCorrectExtension1 other) : this() {
           str_ = other.str_;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public MessageSetCorrectExtension1 Clone() {
           return new MessageSetCorrectExtension1(this);
         }
@@ -5437,6 +5730,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         private string str_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string Str {
           get { return str_ ?? StrDefaultValue; }
           set {
@@ -5445,21 +5739,25 @@ namespace ProtobufTestMessages.Proto2 {
         }
         /// <summary>Gets whether the "str" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasStr {
           get { return str_ != null; }
         }
         /// <summary>Clears the value of the "str" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearStr() {
           str_ = null;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as MessageSetCorrectExtension1);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(MessageSetCorrectExtension1 other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -5472,6 +5770,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasStr) hash ^= Str.GetHashCode();
@@ -5482,11 +5781,13 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -5503,6 +5804,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasStr) {
             output.WriteRawTag(202, 1);
@@ -5515,6 +5817,7 @@ namespace ProtobufTestMessages.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasStr) {
@@ -5527,6 +5830,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(MessageSetCorrectExtension1 other) {
           if (other == null) {
             return;
@@ -5538,6 +5842,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -5559,6 +5864,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -5578,6 +5884,7 @@ namespace ProtobufTestMessages.Proto2 {
         #region Extensions
         /// <summary>Container for extensions for other messages declared in the MessageSetCorrectExtension1 message type.</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static partial class Extensions {
           public static readonly pb::Extension<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.MessageSetCorrect, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.MessageSetCorrectExtension1> MessageSetExtension =
             new pb::Extension<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.MessageSetCorrect, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.MessageSetCorrectExtension1>(1547769, pb::FieldCodec.ForMessage(12382154, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.MessageSetCorrectExtension1.Parser));
@@ -5595,19 +5902,23 @@ namespace ProtobufTestMessages.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<MessageSetCorrectExtension2> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Descriptor.NestedTypes[23]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public MessageSetCorrectExtension2() {
           OnConstruction();
         }
@@ -5615,6 +5926,7 @@ namespace ProtobufTestMessages.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public MessageSetCorrectExtension2(MessageSetCorrectExtension2 other) : this() {
           _hasBits0 = other._hasBits0;
           i_ = other.i_;
@@ -5622,6 +5934,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public MessageSetCorrectExtension2 Clone() {
           return new MessageSetCorrectExtension2(this);
         }
@@ -5632,6 +5945,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         private int i_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int I {
           get { if ((_hasBits0 & 1) != 0) { return i_; } else { return IDefaultValue; } }
           set {
@@ -5641,21 +5955,25 @@ namespace ProtobufTestMessages.Proto2 {
         }
         /// <summary>Gets whether the "i" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasI {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "i" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearI() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as MessageSetCorrectExtension2);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(MessageSetCorrectExtension2 other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -5668,6 +5986,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasI) hash ^= I.GetHashCode();
@@ -5678,11 +5997,13 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -5699,6 +6020,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasI) {
             output.WriteRawTag(72);
@@ -5711,6 +6033,7 @@ namespace ProtobufTestMessages.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasI) {
@@ -5723,6 +6046,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(MessageSetCorrectExtension2 other) {
           if (other == null) {
             return;
@@ -5734,6 +6058,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -5755,6 +6080,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -5774,6 +6100,7 @@ namespace ProtobufTestMessages.Proto2 {
         #region Extensions
         /// <summary>Container for extensions for other messages declared in the MessageSetCorrectExtension2 message type.</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static partial class Extensions {
           public static readonly pb::Extension<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.MessageSetCorrect, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.MessageSetCorrectExtension2> MessageSetExtension =
             new pb::Extension<global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.MessageSetCorrect, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.MessageSetCorrectExtension2>(4135312, pb::FieldCodec.ForMessage(33082498, global::ProtobufTestMessages.Proto2.TestAllTypesProto2.Types.MessageSetCorrectExtension2.Parser));
@@ -5796,19 +6123,23 @@ namespace ProtobufTestMessages.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ForeignMessageProto2> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::ProtobufTestMessages.Proto2.TestMessagesProto2Reflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessageProto2() {
       OnConstruction();
     }
@@ -5816,6 +6147,7 @@ namespace ProtobufTestMessages.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessageProto2(ForeignMessageProto2 other) : this() {
       _hasBits0 = other._hasBits0;
       c_ = other.c_;
@@ -5823,6 +6155,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessageProto2 Clone() {
       return new ForeignMessageProto2(this);
     }
@@ -5833,6 +6166,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int c_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int C {
       get { if ((_hasBits0 & 1) != 0) { return c_; } else { return CDefaultValue; } }
       set {
@@ -5842,21 +6176,25 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "c" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasC {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "c" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearC() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ForeignMessageProto2);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ForeignMessageProto2 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5869,6 +6207,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasC) hash ^= C.GetHashCode();
@@ -5879,11 +6218,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5900,6 +6241,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasC) {
         output.WriteRawTag(8);
@@ -5912,6 +6254,7 @@ namespace ProtobufTestMessages.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasC) {
@@ -5924,6 +6267,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ForeignMessageProto2 other) {
       if (other == null) {
         return;
@@ -5935,6 +6279,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5956,6 +6301,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5983,19 +6329,23 @@ namespace ProtobufTestMessages.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<UnknownToTestAllTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::ProtobufTestMessages.Proto2.TestMessagesProto2Reflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UnknownToTestAllTypes() {
       OnConstruction();
     }
@@ -6003,6 +6353,7 @@ namespace ProtobufTestMessages.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UnknownToTestAllTypes(UnknownToTestAllTypes other) : this() {
       _hasBits0 = other._hasBits0;
       optionalInt32_ = other.optionalInt32_;
@@ -6015,6 +6366,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UnknownToTestAllTypes Clone() {
       return new UnknownToTestAllTypes(this);
     }
@@ -6025,6 +6377,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private int optionalInt32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalInt32 {
       get { if ((_hasBits0 & 1) != 0) { return optionalInt32_; } else { return OptionalInt32DefaultValue; } }
       set {
@@ -6034,11 +6387,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_int32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalInt32 {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "optional_int32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalInt32() {
       _hasBits0 &= ~1;
     }
@@ -6049,6 +6404,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private string optionalString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalString {
       get { return optionalString_ ?? OptionalStringDefaultValue; }
       set {
@@ -6057,11 +6413,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalString {
       get { return optionalString_ != null; }
     }
     /// <summary>Clears the value of the "optional_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalString() {
       optionalString_ = null;
     }
@@ -6070,6 +6428,7 @@ namespace ProtobufTestMessages.Proto2 {
     public const int NestedMessageFieldNumber = 1003;
     private global::ProtobufTestMessages.Proto2.ForeignMessageProto2 nestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto2.ForeignMessageProto2 NestedMessage {
       get { return nestedMessage_; }
       set {
@@ -6081,6 +6440,7 @@ namespace ProtobufTestMessages.Proto2 {
     public const int OptionalGroupFieldNumber = 1004;
     private global::ProtobufTestMessages.Proto2.UnknownToTestAllTypes.Types.OptionalGroup optionalGroup_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto2.UnknownToTestAllTypes.Types.OptionalGroup OptionalGroup {
       get { return optionalGroup_; }
       set {
@@ -6089,11 +6449,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the optionalgroup field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalGroup {
       get { return optionalGroup_ != null; }
     }
     /// <summary>Clears the value of the optionalgroup field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalGroup() {
       optionalGroup_ = null;
     }
@@ -6104,6 +6466,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     private bool optionalBool_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool OptionalBool {
       get { if ((_hasBits0 & 2) != 0) { return optionalBool_; } else { return OptionalBoolDefaultValue; } }
       set {
@@ -6113,11 +6476,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
     /// <summary>Gets whether the "optional_bool" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalBool {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "optional_bool" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalBool() {
       _hasBits0 &= ~2;
     }
@@ -6128,16 +6493,19 @@ namespace ProtobufTestMessages.Proto2 {
         = pb::FieldCodec.ForInt32(8088);
     private readonly pbc::RepeatedField<int> repeatedInt32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedInt32 {
       get { return repeatedInt32_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as UnknownToTestAllTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(UnknownToTestAllTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6155,6 +6523,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasOptionalInt32) hash ^= OptionalInt32.GetHashCode();
@@ -6170,11 +6539,13 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6209,6 +6580,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasOptionalInt32) {
         output.WriteRawTag(200, 62);
@@ -6239,6 +6611,7 @@ namespace ProtobufTestMessages.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasOptionalInt32) {
@@ -6264,6 +6637,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(UnknownToTestAllTypes other) {
       if (other == null) {
         return;
@@ -6294,6 +6668,7 @@ namespace ProtobufTestMessages.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6342,6 +6717,7 @@ namespace ProtobufTestMessages.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6388,6 +6764,7 @@ namespace ProtobufTestMessages.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the UnknownToTestAllTypes message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class OptionalGroup : pb::IMessage<OptionalGroup>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -6398,19 +6775,23 @@ namespace ProtobufTestMessages.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<OptionalGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::ProtobufTestMessages.Proto2.UnknownToTestAllTypes.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup() {
           OnConstruction();
         }
@@ -6418,6 +6799,7 @@ namespace ProtobufTestMessages.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup(OptionalGroup other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -6425,6 +6807,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup Clone() {
           return new OptionalGroup(this);
         }
@@ -6435,6 +6818,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -6444,21 +6828,25 @@ namespace ProtobufTestMessages.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as OptionalGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(OptionalGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -6471,6 +6859,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -6481,11 +6870,13 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -6502,6 +6893,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(8);
@@ -6514,6 +6906,7 @@ namespace ProtobufTestMessages.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -6526,6 +6919,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(OptionalGroup other) {
           if (other == null) {
             return;
@@ -6537,6 +6931,7 @@ namespace ProtobufTestMessages.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -6560,6 +6955,7 @@ namespace ProtobufTestMessages.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto3.cs b/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto3.cs
index 6f915cb79b..0e0015010d 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto3.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/TestMessagesProto3.cs
@@ -269,19 +269,23 @@ namespace ProtobufTestMessages.Proto3 {
     private static readonly pb::MessageParser<TestAllTypesProto3> _parser = new pb::MessageParser<TestAllTypesProto3>(() => new TestAllTypesProto3());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestAllTypesProto3> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::ProtobufTestMessages.Proto3.TestMessagesProto3Reflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypesProto3() {
       OnConstruction();
     }
@@ -289,6 +293,7 @@ namespace ProtobufTestMessages.Proto3 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypesProto3(TestAllTypesProto3 other) : this() {
       optionalInt32_ = other.optionalInt32_;
       optionalInt64_ = other.optionalInt64_;
@@ -468,6 +473,7 @@ namespace ProtobufTestMessages.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypesProto3 Clone() {
       return new TestAllTypesProto3(this);
     }
@@ -479,6 +485,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// Singular
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalInt32 {
       get { return optionalInt32_; }
       set {
@@ -490,6 +497,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalInt64FieldNumber = 2;
     private long optionalInt64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalInt64 {
       get { return optionalInt64_; }
       set {
@@ -501,6 +509,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalUint32FieldNumber = 3;
     private uint optionalUint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OptionalUint32 {
       get { return optionalUint32_; }
       set {
@@ -512,6 +521,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalUint64FieldNumber = 4;
     private ulong optionalUint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong OptionalUint64 {
       get { return optionalUint64_; }
       set {
@@ -523,6 +533,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalSint32FieldNumber = 5;
     private int optionalSint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalSint32 {
       get { return optionalSint32_; }
       set {
@@ -534,6 +545,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalSint64FieldNumber = 6;
     private long optionalSint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalSint64 {
       get { return optionalSint64_; }
       set {
@@ -545,6 +557,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalFixed32FieldNumber = 7;
     private uint optionalFixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OptionalFixed32 {
       get { return optionalFixed32_; }
       set {
@@ -556,6 +569,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalFixed64FieldNumber = 8;
     private ulong optionalFixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong OptionalFixed64 {
       get { return optionalFixed64_; }
       set {
@@ -567,6 +581,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalSfixed32FieldNumber = 9;
     private int optionalSfixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalSfixed32 {
       get { return optionalSfixed32_; }
       set {
@@ -578,6 +593,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalSfixed64FieldNumber = 10;
     private long optionalSfixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalSfixed64 {
       get { return optionalSfixed64_; }
       set {
@@ -589,6 +605,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalFloatFieldNumber = 11;
     private float optionalFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float OptionalFloat {
       get { return optionalFloat_; }
       set {
@@ -600,6 +617,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalDoubleFieldNumber = 12;
     private double optionalDouble_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double OptionalDouble {
       get { return optionalDouble_; }
       set {
@@ -611,6 +629,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalBoolFieldNumber = 13;
     private bool optionalBool_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool OptionalBool {
       get { return optionalBool_; }
       set {
@@ -622,6 +641,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalStringFieldNumber = 14;
     private string optionalString_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalString {
       get { return optionalString_; }
       set {
@@ -633,6 +653,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalBytesFieldNumber = 15;
     private pb::ByteString optionalBytes_ = pb::ByteString.Empty;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OptionalBytes {
       get { return optionalBytes_; }
       set {
@@ -644,6 +665,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalNestedMessageFieldNumber = 18;
     private global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage optionalNestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage OptionalNestedMessage {
       get { return optionalNestedMessage_; }
       set {
@@ -655,6 +677,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalForeignMessageFieldNumber = 19;
     private global::ProtobufTestMessages.Proto3.ForeignMessage optionalForeignMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto3.ForeignMessage OptionalForeignMessage {
       get { return optionalForeignMessage_; }
       set {
@@ -666,6 +689,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalNestedEnumFieldNumber = 21;
     private global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum optionalNestedEnum_ = global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum.Foo;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum OptionalNestedEnum {
       get { return optionalNestedEnum_; }
       set {
@@ -677,6 +701,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalForeignEnumFieldNumber = 22;
     private global::ProtobufTestMessages.Proto3.ForeignEnum optionalForeignEnum_ = global::ProtobufTestMessages.Proto3.ForeignEnum.ForeignFoo;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto3.ForeignEnum OptionalForeignEnum {
       get { return optionalForeignEnum_; }
       set {
@@ -688,6 +713,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalAliasedEnumFieldNumber = 23;
     private global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.AliasedEnum optionalAliasedEnum_ = global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.AliasedEnum.AliasFoo;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.AliasedEnum OptionalAliasedEnum {
       get { return optionalAliasedEnum_; }
       set {
@@ -699,6 +725,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalStringPieceFieldNumber = 24;
     private string optionalStringPiece_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalStringPiece {
       get { return optionalStringPiece_; }
       set {
@@ -710,6 +737,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalCordFieldNumber = 25;
     private string optionalCord_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalCord {
       get { return optionalCord_; }
       set {
@@ -721,6 +749,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int RecursiveMessageFieldNumber = 27;
     private global::ProtobufTestMessages.Proto3.TestAllTypesProto3 recursiveMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto3.TestAllTypesProto3 RecursiveMessage {
       get { return recursiveMessage_; }
       set {
@@ -737,6 +766,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// Repeated
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedInt32 {
       get { return repeatedInt32_; }
     }
@@ -747,6 +777,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForInt64(258);
     private readonly pbc::RepeatedField<long> repeatedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedInt64 {
       get { return repeatedInt64_; }
     }
@@ -757,6 +788,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForUInt32(266);
     private readonly pbc::RepeatedField<uint> repeatedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> RepeatedUint32 {
       get { return repeatedUint32_; }
     }
@@ -767,6 +799,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForUInt64(274);
     private readonly pbc::RepeatedField<ulong> repeatedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedUint64 {
       get { return repeatedUint64_; }
     }
@@ -777,6 +810,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSInt32(282);
     private readonly pbc::RepeatedField<int> repeatedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedSint32 {
       get { return repeatedSint32_; }
     }
@@ -787,6 +821,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSInt64(290);
     private readonly pbc::RepeatedField<long> repeatedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedSint64 {
       get { return repeatedSint64_; }
     }
@@ -797,6 +832,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForFixed32(298);
     private readonly pbc::RepeatedField<uint> repeatedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> RepeatedFixed32 {
       get { return repeatedFixed32_; }
     }
@@ -807,6 +843,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForFixed64(306);
     private readonly pbc::RepeatedField<ulong> repeatedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedFixed64 {
       get { return repeatedFixed64_; }
     }
@@ -817,6 +854,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSFixed32(314);
     private readonly pbc::RepeatedField<int> repeatedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedSfixed32 {
       get { return repeatedSfixed32_; }
     }
@@ -827,6 +865,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSFixed64(322);
     private readonly pbc::RepeatedField<long> repeatedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedSfixed64 {
       get { return repeatedSfixed64_; }
     }
@@ -837,6 +876,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForFloat(330);
     private readonly pbc::RepeatedField<float> repeatedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> RepeatedFloat {
       get { return repeatedFloat_; }
     }
@@ -847,6 +887,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForDouble(338);
     private readonly pbc::RepeatedField<double> repeatedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> RepeatedDouble {
       get { return repeatedDouble_; }
     }
@@ -857,6 +898,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForBool(346);
     private readonly pbc::RepeatedField<bool> repeatedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> RepeatedBool {
       get { return repeatedBool_; }
     }
@@ -867,6 +909,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForString(354);
     private readonly pbc::RepeatedField<string> repeatedString_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedString {
       get { return repeatedString_; }
     }
@@ -877,6 +920,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForBytes(362);
     private readonly pbc::RepeatedField<pb::ByteString> repeatedBytes_ = new pbc::RepeatedField<pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<pb::ByteString> RepeatedBytes {
       get { return repeatedBytes_; }
     }
@@ -887,6 +931,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForMessage(386, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage.Parser);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage> repeatedNestedMessage_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage> RepeatedNestedMessage {
       get { return repeatedNestedMessage_; }
     }
@@ -897,6 +942,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForMessage(394, global::ProtobufTestMessages.Proto3.ForeignMessage.Parser);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto3.ForeignMessage> repeatedForeignMessage_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto3.ForeignMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto3.ForeignMessage> RepeatedForeignMessage {
       get { return repeatedForeignMessage_; }
     }
@@ -907,6 +953,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForEnum(410, x => (int) x, x => (global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum) x);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum> repeatedNestedEnum_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum> RepeatedNestedEnum {
       get { return repeatedNestedEnum_; }
     }
@@ -917,6 +964,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForEnum(418, x => (int) x, x => (global::ProtobufTestMessages.Proto3.ForeignEnum) x);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto3.ForeignEnum> repeatedForeignEnum_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto3.ForeignEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto3.ForeignEnum> RepeatedForeignEnum {
       get { return repeatedForeignEnum_; }
     }
@@ -927,6 +975,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForString(434);
     private readonly pbc::RepeatedField<string> repeatedStringPiece_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedStringPiece {
       get { return repeatedStringPiece_; }
     }
@@ -937,6 +986,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForString(442);
     private readonly pbc::RepeatedField<string> repeatedCord_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedCord {
       get { return repeatedCord_; }
     }
@@ -950,6 +1000,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// Packed
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedInt32 {
       get { return packedInt32_; }
     }
@@ -960,6 +1011,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForInt64(610);
     private readonly pbc::RepeatedField<long> packedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedInt64 {
       get { return packedInt64_; }
     }
@@ -970,6 +1022,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForUInt32(618);
     private readonly pbc::RepeatedField<uint> packedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> PackedUint32 {
       get { return packedUint32_; }
     }
@@ -980,6 +1033,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForUInt64(626);
     private readonly pbc::RepeatedField<ulong> packedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> PackedUint64 {
       get { return packedUint64_; }
     }
@@ -990,6 +1044,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSInt32(634);
     private readonly pbc::RepeatedField<int> packedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedSint32 {
       get { return packedSint32_; }
     }
@@ -1000,6 +1055,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSInt64(642);
     private readonly pbc::RepeatedField<long> packedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedSint64 {
       get { return packedSint64_; }
     }
@@ -1010,6 +1066,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForFixed32(650);
     private readonly pbc::RepeatedField<uint> packedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> PackedFixed32 {
       get { return packedFixed32_; }
     }
@@ -1020,6 +1077,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForFixed64(658);
     private readonly pbc::RepeatedField<ulong> packedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> PackedFixed64 {
       get { return packedFixed64_; }
     }
@@ -1030,6 +1088,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSFixed32(666);
     private readonly pbc::RepeatedField<int> packedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedSfixed32 {
       get { return packedSfixed32_; }
     }
@@ -1040,6 +1099,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSFixed64(674);
     private readonly pbc::RepeatedField<long> packedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedSfixed64 {
       get { return packedSfixed64_; }
     }
@@ -1050,6 +1110,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForFloat(682);
     private readonly pbc::RepeatedField<float> packedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> PackedFloat {
       get { return packedFloat_; }
     }
@@ -1060,6 +1121,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForDouble(690);
     private readonly pbc::RepeatedField<double> packedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> PackedDouble {
       get { return packedDouble_; }
     }
@@ -1070,6 +1132,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForBool(698);
     private readonly pbc::RepeatedField<bool> packedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> PackedBool {
       get { return packedBool_; }
     }
@@ -1080,6 +1143,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForEnum(706, x => (int) x, x => (global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum) x);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum> packedNestedEnum_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum> PackedNestedEnum {
       get { return packedNestedEnum_; }
     }
@@ -1093,6 +1157,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// Unpacked
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedInt32 {
       get { return unpackedInt32_; }
     }
@@ -1103,6 +1168,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForInt64(720);
     private readonly pbc::RepeatedField<long> unpackedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedInt64 {
       get { return unpackedInt64_; }
     }
@@ -1113,6 +1179,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForUInt32(728);
     private readonly pbc::RepeatedField<uint> unpackedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> UnpackedUint32 {
       get { return unpackedUint32_; }
     }
@@ -1123,6 +1190,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForUInt64(736);
     private readonly pbc::RepeatedField<ulong> unpackedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> UnpackedUint64 {
       get { return unpackedUint64_; }
     }
@@ -1133,6 +1201,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSInt32(744);
     private readonly pbc::RepeatedField<int> unpackedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedSint32 {
       get { return unpackedSint32_; }
     }
@@ -1143,6 +1212,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSInt64(752);
     private readonly pbc::RepeatedField<long> unpackedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedSint64 {
       get { return unpackedSint64_; }
     }
@@ -1153,6 +1223,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForFixed32(765);
     private readonly pbc::RepeatedField<uint> unpackedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> UnpackedFixed32 {
       get { return unpackedFixed32_; }
     }
@@ -1163,6 +1234,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForFixed64(769);
     private readonly pbc::RepeatedField<ulong> unpackedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> UnpackedFixed64 {
       get { return unpackedFixed64_; }
     }
@@ -1173,6 +1245,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSFixed32(781);
     private readonly pbc::RepeatedField<int> unpackedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedSfixed32 {
       get { return unpackedSfixed32_; }
     }
@@ -1183,6 +1256,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForSFixed64(785);
     private readonly pbc::RepeatedField<long> unpackedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedSfixed64 {
       get { return unpackedSfixed64_; }
     }
@@ -1193,6 +1267,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForFloat(797);
     private readonly pbc::RepeatedField<float> unpackedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> UnpackedFloat {
       get { return unpackedFloat_; }
     }
@@ -1203,6 +1278,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForDouble(801);
     private readonly pbc::RepeatedField<double> unpackedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> UnpackedDouble {
       get { return unpackedDouble_; }
     }
@@ -1213,6 +1289,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForBool(808);
     private readonly pbc::RepeatedField<bool> unpackedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> UnpackedBool {
       get { return unpackedBool_; }
     }
@@ -1223,6 +1300,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForEnum(816, x => (int) x, x => (global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum) x);
     private readonly pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum> unpackedNestedEnum_ = new pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum> UnpackedNestedEnum {
       get { return unpackedNestedEnum_; }
     }
@@ -1236,6 +1314,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// Map
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapInt32Int32 {
       get { return mapInt32Int32_; }
     }
@@ -1246,6 +1325,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForInt64(8, 0L), pb::FieldCodec.ForInt64(16, 0L), 458);
     private readonly pbc::MapField<long, long> mapInt64Int64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapInt64Int64 {
       get { return mapInt64Int64_; }
     }
@@ -1256,6 +1336,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<uint, uint>.Codec(pb::FieldCodec.ForUInt32(8, 0), pb::FieldCodec.ForUInt32(16, 0), 466);
     private readonly pbc::MapField<uint, uint> mapUint32Uint32_ = new pbc::MapField<uint, uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<uint, uint> MapUint32Uint32 {
       get { return mapUint32Uint32_; }
     }
@@ -1266,6 +1347,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<ulong, ulong>.Codec(pb::FieldCodec.ForUInt64(8, 0UL), pb::FieldCodec.ForUInt64(16, 0UL), 474);
     private readonly pbc::MapField<ulong, ulong> mapUint64Uint64_ = new pbc::MapField<ulong, ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<ulong, ulong> MapUint64Uint64 {
       get { return mapUint64Uint64_; }
     }
@@ -1276,6 +1358,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForSInt32(8, 0), pb::FieldCodec.ForSInt32(16, 0), 482);
     private readonly pbc::MapField<int, int> mapSint32Sint32_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapSint32Sint32 {
       get { return mapSint32Sint32_; }
     }
@@ -1286,6 +1369,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForSInt64(8, 0L), pb::FieldCodec.ForSInt64(16, 0L), 490);
     private readonly pbc::MapField<long, long> mapSint64Sint64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapSint64Sint64 {
       get { return mapSint64Sint64_; }
     }
@@ -1296,6 +1380,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<uint, uint>.Codec(pb::FieldCodec.ForFixed32(13, 0), pb::FieldCodec.ForFixed32(21, 0), 498);
     private readonly pbc::MapField<uint, uint> mapFixed32Fixed32_ = new pbc::MapField<uint, uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<uint, uint> MapFixed32Fixed32 {
       get { return mapFixed32Fixed32_; }
     }
@@ -1306,6 +1391,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<ulong, ulong>.Codec(pb::FieldCodec.ForFixed64(9, 0UL), pb::FieldCodec.ForFixed64(17, 0UL), 506);
     private readonly pbc::MapField<ulong, ulong> mapFixed64Fixed64_ = new pbc::MapField<ulong, ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<ulong, ulong> MapFixed64Fixed64 {
       get { return mapFixed64Fixed64_; }
     }
@@ -1316,6 +1402,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<int, int>.Codec(pb::FieldCodec.ForSFixed32(13, 0), pb::FieldCodec.ForSFixed32(21, 0), 514);
     private readonly pbc::MapField<int, int> mapSfixed32Sfixed32_ = new pbc::MapField<int, int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int> MapSfixed32Sfixed32 {
       get { return mapSfixed32Sfixed32_; }
     }
@@ -1326,6 +1413,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<long, long>.Codec(pb::FieldCodec.ForSFixed64(9, 0L), pb::FieldCodec.ForSFixed64(17, 0L), 522);
     private readonly pbc::MapField<long, long> mapSfixed64Sfixed64_ = new pbc::MapField<long, long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<long, long> MapSfixed64Sfixed64 {
       get { return mapSfixed64Sfixed64_; }
     }
@@ -1336,6 +1424,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<int, float>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForFloat(21, 0F), 530);
     private readonly pbc::MapField<int, float> mapInt32Float_ = new pbc::MapField<int, float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, float> MapInt32Float {
       get { return mapInt32Float_; }
     }
@@ -1346,6 +1435,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<int, double>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForDouble(17, 0D), 538);
     private readonly pbc::MapField<int, double> mapInt32Double_ = new pbc::MapField<int, double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, double> MapInt32Double {
       get { return mapInt32Double_; }
     }
@@ -1356,6 +1446,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<bool, bool>.Codec(pb::FieldCodec.ForBool(8, false), pb::FieldCodec.ForBool(16, false), 546);
     private readonly pbc::MapField<bool, bool> mapBoolBool_ = new pbc::MapField<bool, bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<bool, bool> MapBoolBool {
       get { return mapBoolBool_; }
     }
@@ -1366,6 +1457,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<string, string>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForString(18, ""), 554);
     private readonly pbc::MapField<string, string> mapStringString_ = new pbc::MapField<string, string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, string> MapStringString {
       get { return mapStringString_; }
     }
@@ -1376,6 +1468,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<string, pb::ByteString>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForBytes(18, pb::ByteString.Empty), 562);
     private readonly pbc::MapField<string, pb::ByteString> mapStringBytes_ = new pbc::MapField<string, pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, pb::ByteString> MapStringBytes {
       get { return mapStringBytes_; }
     }
@@ -1386,6 +1479,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<string, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForMessage(18, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage.Parser), 570);
     private readonly pbc::MapField<string, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage> mapStringNestedMessage_ = new pbc::MapField<string, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage> MapStringNestedMessage {
       get { return mapStringNestedMessage_; }
     }
@@ -1396,6 +1490,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<string, global::ProtobufTestMessages.Proto3.ForeignMessage>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForMessage(18, global::ProtobufTestMessages.Proto3.ForeignMessage.Parser), 578);
     private readonly pbc::MapField<string, global::ProtobufTestMessages.Proto3.ForeignMessage> mapStringForeignMessage_ = new pbc::MapField<string, global::ProtobufTestMessages.Proto3.ForeignMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, global::ProtobufTestMessages.Proto3.ForeignMessage> MapStringForeignMessage {
       get { return mapStringForeignMessage_; }
     }
@@ -1406,6 +1501,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<string, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForEnum(16, x => (int) x, x => (global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum) x, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum.Foo), 586);
     private readonly pbc::MapField<string, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum> mapStringNestedEnum_ = new pbc::MapField<string, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum> MapStringNestedEnum {
       get { return mapStringNestedEnum_; }
     }
@@ -1416,6 +1512,7 @@ namespace ProtobufTestMessages.Proto3 {
         = new pbc::MapField<string, global::ProtobufTestMessages.Proto3.ForeignEnum>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForEnum(16, x => (int) x, x => (global::ProtobufTestMessages.Proto3.ForeignEnum) x, global::ProtobufTestMessages.Proto3.ForeignEnum.ForeignFoo), 594);
     private readonly pbc::MapField<string, global::ProtobufTestMessages.Proto3.ForeignEnum> mapStringForeignEnum_ = new pbc::MapField<string, global::ProtobufTestMessages.Proto3.ForeignEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, global::ProtobufTestMessages.Proto3.ForeignEnum> MapStringForeignEnum {
       get { return mapStringForeignEnum_; }
     }
@@ -1423,6 +1520,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// <summary>Field number for the "oneof_uint32" field.</summary>
     public const int OneofUint32FieldNumber = 111;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OneofUint32 {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofUint32 ? (uint) oneofField_ : 0; }
       set {
@@ -1434,6 +1532,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// <summary>Field number for the "oneof_nested_message" field.</summary>
     public const int OneofNestedMessageFieldNumber = 112;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage OneofNestedMessage {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofNestedMessage ? (global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedMessage) oneofField_ : null; }
       set {
@@ -1445,6 +1544,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// <summary>Field number for the "oneof_string" field.</summary>
     public const int OneofStringFieldNumber = 113;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OneofString {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofString ? (string) oneofField_ : ""; }
       set {
@@ -1456,6 +1556,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// <summary>Field number for the "oneof_bytes" field.</summary>
     public const int OneofBytesFieldNumber = 114;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OneofBytes {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofBytes ? (pb::ByteString) oneofField_ : pb::ByteString.Empty; }
       set {
@@ -1467,6 +1568,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// <summary>Field number for the "oneof_bool" field.</summary>
     public const int OneofBoolFieldNumber = 115;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool OneofBool {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofBool ? (bool) oneofField_ : false; }
       set {
@@ -1478,6 +1580,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// <summary>Field number for the "oneof_uint64" field.</summary>
     public const int OneofUint64FieldNumber = 116;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong OneofUint64 {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofUint64 ? (ulong) oneofField_ : 0UL; }
       set {
@@ -1489,6 +1592,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// <summary>Field number for the "oneof_float" field.</summary>
     public const int OneofFloatFieldNumber = 117;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float OneofFloat {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofFloat ? (float) oneofField_ : 0F; }
       set {
@@ -1500,6 +1604,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// <summary>Field number for the "oneof_double" field.</summary>
     public const int OneofDoubleFieldNumber = 118;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double OneofDouble {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofDouble ? (double) oneofField_ : 0D; }
       set {
@@ -1511,6 +1616,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// <summary>Field number for the "oneof_enum" field.</summary>
     public const int OneofEnumFieldNumber = 119;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum OneofEnum {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofEnum ? (global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum) oneofField_ : global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Types.NestedEnum.Foo; }
       set {
@@ -1522,6 +1628,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// <summary>Field number for the "oneof_null_value" field.</summary>
     public const int OneofNullValueFieldNumber = 120;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.NullValue OneofNullValue {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofNullValue ? (global::Google.Protobuf.WellKnownTypes.NullValue) oneofField_ : global::Google.Protobuf.WellKnownTypes.NullValue.NullValue; }
       set {
@@ -1538,6 +1645,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// Well-known types
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool? OptionalBoolWrapper {
       get { return optionalBoolWrapper_; }
       set {
@@ -1551,6 +1659,7 @@ namespace ProtobufTestMessages.Proto3 {
     private static readonly pb::FieldCodec<int?> _single_optionalInt32Wrapper_codec = pb::FieldCodec.ForStructWrapper<int>(1618);
     private int? optionalInt32Wrapper_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int? OptionalInt32Wrapper {
       get { return optionalInt32Wrapper_; }
       set {
@@ -1564,6 +1673,7 @@ namespace ProtobufTestMessages.Proto3 {
     private static readonly pb::FieldCodec<long?> _single_optionalInt64Wrapper_codec = pb::FieldCodec.ForStructWrapper<long>(1626);
     private long? optionalInt64Wrapper_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? OptionalInt64Wrapper {
       get { return optionalInt64Wrapper_; }
       set {
@@ -1577,6 +1687,7 @@ namespace ProtobufTestMessages.Proto3 {
     private static readonly pb::FieldCodec<uint?> _single_optionalUint32Wrapper_codec = pb::FieldCodec.ForStructWrapper<uint>(1634);
     private uint? optionalUint32Wrapper_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint? OptionalUint32Wrapper {
       get { return optionalUint32Wrapper_; }
       set {
@@ -1590,6 +1701,7 @@ namespace ProtobufTestMessages.Proto3 {
     private static readonly pb::FieldCodec<ulong?> _single_optionalUint64Wrapper_codec = pb::FieldCodec.ForStructWrapper<ulong>(1642);
     private ulong? optionalUint64Wrapper_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong? OptionalUint64Wrapper {
       get { return optionalUint64Wrapper_; }
       set {
@@ -1603,6 +1715,7 @@ namespace ProtobufTestMessages.Proto3 {
     private static readonly pb::FieldCodec<float?> _single_optionalFloatWrapper_codec = pb::FieldCodec.ForStructWrapper<float>(1650);
     private float? optionalFloatWrapper_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float? OptionalFloatWrapper {
       get { return optionalFloatWrapper_; }
       set {
@@ -1616,6 +1729,7 @@ namespace ProtobufTestMessages.Proto3 {
     private static readonly pb::FieldCodec<double?> _single_optionalDoubleWrapper_codec = pb::FieldCodec.ForStructWrapper<double>(1658);
     private double? optionalDoubleWrapper_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? OptionalDoubleWrapper {
       get { return optionalDoubleWrapper_; }
       set {
@@ -1629,6 +1743,7 @@ namespace ProtobufTestMessages.Proto3 {
     private static readonly pb::FieldCodec<string> _single_optionalStringWrapper_codec = pb::FieldCodec.ForClassWrapper<string>(1666);
     private string optionalStringWrapper_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalStringWrapper {
       get { return optionalStringWrapper_; }
       set {
@@ -1642,6 +1757,7 @@ namespace ProtobufTestMessages.Proto3 {
     private static readonly pb::FieldCodec<pb::ByteString> _single_optionalBytesWrapper_codec = pb::FieldCodec.ForClassWrapper<pb::ByteString>(1674);
     private pb::ByteString optionalBytesWrapper_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OptionalBytesWrapper {
       get { return optionalBytesWrapper_; }
       set {
@@ -1656,6 +1772,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForStructWrapper<bool>(1690);
     private readonly pbc::RepeatedField<bool?> repeatedBoolWrapper_ = new pbc::RepeatedField<bool?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool?> RepeatedBoolWrapper {
       get { return repeatedBoolWrapper_; }
     }
@@ -1666,6 +1783,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForStructWrapper<int>(1698);
     private readonly pbc::RepeatedField<int?> repeatedInt32Wrapper_ = new pbc::RepeatedField<int?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int?> RepeatedInt32Wrapper {
       get { return repeatedInt32Wrapper_; }
     }
@@ -1676,6 +1794,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForStructWrapper<long>(1706);
     private readonly pbc::RepeatedField<long?> repeatedInt64Wrapper_ = new pbc::RepeatedField<long?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long?> RepeatedInt64Wrapper {
       get { return repeatedInt64Wrapper_; }
     }
@@ -1686,6 +1805,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForStructWrapper<uint>(1714);
     private readonly pbc::RepeatedField<uint?> repeatedUint32Wrapper_ = new pbc::RepeatedField<uint?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint?> RepeatedUint32Wrapper {
       get { return repeatedUint32Wrapper_; }
     }
@@ -1696,6 +1816,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForStructWrapper<ulong>(1722);
     private readonly pbc::RepeatedField<ulong?> repeatedUint64Wrapper_ = new pbc::RepeatedField<ulong?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong?> RepeatedUint64Wrapper {
       get { return repeatedUint64Wrapper_; }
     }
@@ -1706,6 +1827,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForStructWrapper<float>(1730);
     private readonly pbc::RepeatedField<float?> repeatedFloatWrapper_ = new pbc::RepeatedField<float?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float?> RepeatedFloatWrapper {
       get { return repeatedFloatWrapper_; }
     }
@@ -1716,6 +1838,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForStructWrapper<double>(1738);
     private readonly pbc::RepeatedField<double?> repeatedDoubleWrapper_ = new pbc::RepeatedField<double?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double?> RepeatedDoubleWrapper {
       get { return repeatedDoubleWrapper_; }
     }
@@ -1726,6 +1849,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForClassWrapper<string>(1746);
     private readonly pbc::RepeatedField<string> repeatedStringWrapper_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedStringWrapper {
       get { return repeatedStringWrapper_; }
     }
@@ -1736,6 +1860,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForClassWrapper<pb::ByteString>(1754);
     private readonly pbc::RepeatedField<pb::ByteString> repeatedBytesWrapper_ = new pbc::RepeatedField<pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<pb::ByteString> RepeatedBytesWrapper {
       get { return repeatedBytesWrapper_; }
     }
@@ -1744,6 +1869,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalDurationFieldNumber = 301;
     private global::Google.Protobuf.WellKnownTypes.Duration optionalDuration_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Duration OptionalDuration {
       get { return optionalDuration_; }
       set {
@@ -1755,6 +1881,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalTimestampFieldNumber = 302;
     private global::Google.Protobuf.WellKnownTypes.Timestamp optionalTimestamp_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Timestamp OptionalTimestamp {
       get { return optionalTimestamp_; }
       set {
@@ -1766,6 +1893,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalFieldMaskFieldNumber = 303;
     private global::Google.Protobuf.WellKnownTypes.FieldMask optionalFieldMask_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.FieldMask OptionalFieldMask {
       get { return optionalFieldMask_; }
       set {
@@ -1777,6 +1905,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalStructFieldNumber = 304;
     private global::Google.Protobuf.WellKnownTypes.Struct optionalStruct_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Struct OptionalStruct {
       get { return optionalStruct_; }
       set {
@@ -1788,6 +1917,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalAnyFieldNumber = 305;
     private global::Google.Protobuf.WellKnownTypes.Any optionalAny_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Any OptionalAny {
       get { return optionalAny_; }
       set {
@@ -1799,6 +1929,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalValueFieldNumber = 306;
     private global::Google.Protobuf.WellKnownTypes.Value optionalValue_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Value OptionalValue {
       get { return optionalValue_; }
       set {
@@ -1810,6 +1941,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int OptionalNullValueFieldNumber = 307;
     private global::Google.Protobuf.WellKnownTypes.NullValue optionalNullValue_ = global::Google.Protobuf.WellKnownTypes.NullValue.NullValue;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.NullValue OptionalNullValue {
       get { return optionalNullValue_; }
       set {
@@ -1823,6 +1955,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForMessage(2490, global::Google.Protobuf.WellKnownTypes.Duration.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Duration> repeatedDuration_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Duration>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Duration> RepeatedDuration {
       get { return repeatedDuration_; }
     }
@@ -1833,6 +1966,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForMessage(2498, global::Google.Protobuf.WellKnownTypes.Timestamp.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Timestamp> repeatedTimestamp_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Timestamp>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Timestamp> RepeatedTimestamp {
       get { return repeatedTimestamp_; }
     }
@@ -1843,6 +1977,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForMessage(2506, global::Google.Protobuf.WellKnownTypes.FieldMask.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.FieldMask> repeatedFieldmask_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.FieldMask>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.FieldMask> RepeatedFieldmask {
       get { return repeatedFieldmask_; }
     }
@@ -1853,6 +1988,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForMessage(2594, global::Google.Protobuf.WellKnownTypes.Struct.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Struct> repeatedStruct_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Struct>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Struct> RepeatedStruct {
       get { return repeatedStruct_; }
     }
@@ -1863,6 +1999,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForMessage(2522, global::Google.Protobuf.WellKnownTypes.Any.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Any> repeatedAny_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Any>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Any> RepeatedAny {
       get { return repeatedAny_; }
     }
@@ -1873,6 +2010,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForMessage(2530, global::Google.Protobuf.WellKnownTypes.Value.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Value> repeatedValue_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Value>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Value> RepeatedValue {
       get { return repeatedValue_; }
     }
@@ -1883,6 +2021,7 @@ namespace ProtobufTestMessages.Proto3 {
         = pb::FieldCodec.ForMessage(2538, global::Google.Protobuf.WellKnownTypes.ListValue.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.ListValue> repeatedListValue_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.ListValue>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.ListValue> RepeatedListValue {
       get { return repeatedListValue_; }
     }
@@ -1895,6 +2034,7 @@ namespace ProtobufTestMessages.Proto3 {
     /// (protobuf says names can be any valid C/C++ identifier.)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Fieldname1 {
       get { return fieldname1_; }
       set {
@@ -1906,6 +2046,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName2FieldNumber = 402;
     private int fieldName2_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName2 {
       get { return fieldName2_; }
       set {
@@ -1917,6 +2058,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName3FieldNumber = 403;
     private int FieldName3_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName3 {
       get { return FieldName3_; }
       set {
@@ -1928,6 +2070,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName4FieldNumber = 404;
     private int fieldName4_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName4 {
       get { return fieldName4_; }
       set {
@@ -1939,6 +2082,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int Field0Name5FieldNumber = 405;
     private int field0Name5_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field0Name5 {
       get { return field0Name5_; }
       set {
@@ -1950,6 +2094,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int Field0Name6FieldNumber = 406;
     private int field0Name6_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field0Name6 {
       get { return field0Name6_; }
       set {
@@ -1961,6 +2106,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName7FieldNumber = 407;
     private int fieldName7_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName7 {
       get { return fieldName7_; }
       set {
@@ -1972,6 +2118,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName8FieldNumber = 408;
     private int fieldName8_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName8 {
       get { return fieldName8_; }
       set {
@@ -1983,6 +2130,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName9FieldNumber = 409;
     private int fieldName9_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName9 {
       get { return fieldName9_; }
       set {
@@ -1994,6 +2142,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName10FieldNumber = 410;
     private int fieldName10_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName10 {
       get { return fieldName10_; }
       set {
@@ -2005,6 +2154,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FIELDNAME11FieldNumber = 411;
     private int fIELDNAME11_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FIELDNAME11 {
       get { return fIELDNAME11_; }
       set {
@@ -2016,6 +2166,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FIELDName12FieldNumber = 412;
     private int fIELDName12_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FIELDName12 {
       get { return fIELDName12_; }
       set {
@@ -2027,6 +2178,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName13FieldNumber = 413;
     private int FieldName13_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName13 {
       get { return FieldName13_; }
       set {
@@ -2038,6 +2190,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName14FieldNumber = 414;
     private int FieldName14_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName14 {
       get { return FieldName14_; }
       set {
@@ -2049,6 +2202,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName15FieldNumber = 415;
     private int fieldName15_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName15 {
       get { return fieldName15_; }
       set {
@@ -2060,6 +2214,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName16FieldNumber = 416;
     private int fieldName16_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName16 {
       get { return fieldName16_; }
       set {
@@ -2071,6 +2226,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName17FieldNumber = 417;
     private int fieldName17_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName17 {
       get { return fieldName17_; }
       set {
@@ -2082,6 +2238,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int FieldName18FieldNumber = 418;
     private int fieldName18_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName18 {
       get { return fieldName18_; }
       set {
@@ -2106,22 +2263,26 @@ namespace ProtobufTestMessages.Proto3 {
     }
     private OneofFieldOneofCase oneofFieldCase_ = OneofFieldOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofFieldOneofCase OneofFieldCase {
       get { return oneofFieldCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofField() {
       oneofFieldCase_ = OneofFieldOneofCase.None;
       oneofField_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestAllTypesProto3);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestAllTypesProto3 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2285,6 +2446,7 @@ namespace ProtobufTestMessages.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (OptionalInt32 != 0) hash ^= OptionalInt32.GetHashCode();
@@ -2446,11 +2608,13 @@ namespace ProtobufTestMessages.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2806,6 +2970,7 @@ namespace ProtobufTestMessages.Proto3 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (OptionalInt32 != 0) {
         output.WriteRawTag(8);
@@ -3157,6 +3322,7 @@ namespace ProtobufTestMessages.Proto3 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (OptionalInt32 != 0) {
@@ -3451,6 +3617,7 @@ namespace ProtobufTestMessages.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestAllTypesProto3 other) {
       if (other == null) {
         return;
@@ -3795,6 +3962,7 @@ namespace ProtobufTestMessages.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -4520,6 +4688,7 @@ namespace ProtobufTestMessages.Proto3 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5243,6 +5412,7 @@ namespace ProtobufTestMessages.Proto3 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestAllTypesProto3 message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum NestedEnum {
         [pbr::OriginalName("FOO")] Foo = 0,
@@ -5271,19 +5441,23 @@ namespace ProtobufTestMessages.Proto3 {
         private static readonly pb::MessageParser<NestedMessage> _parser = new pb::MessageParser<NestedMessage>(() => new NestedMessage());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::ProtobufTestMessages.Proto3.TestAllTypesProto3.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -5291,6 +5465,7 @@ namespace ProtobufTestMessages.Proto3 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           a_ = other.a_;
           corecursive_ = other.corecursive_ != null ? other.corecursive_.Clone() : null;
@@ -5298,6 +5473,7 @@ namespace ProtobufTestMessages.Proto3 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -5306,6 +5482,7 @@ namespace ProtobufTestMessages.Proto3 {
         public const int AFieldNumber = 1;
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { return a_; }
           set {
@@ -5317,6 +5494,7 @@ namespace ProtobufTestMessages.Proto3 {
         public const int CorecursiveFieldNumber = 2;
         private global::ProtobufTestMessages.Proto3.TestAllTypesProto3 corecursive_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public global::ProtobufTestMessages.Proto3.TestAllTypesProto3 Corecursive {
           get { return corecursive_; }
           set {
@@ -5325,11 +5503,13 @@ namespace ProtobufTestMessages.Proto3 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -5343,6 +5523,7 @@ namespace ProtobufTestMessages.Proto3 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (A != 0) hash ^= A.GetHashCode();
@@ -5354,11 +5535,13 @@ namespace ProtobufTestMessages.Proto3 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -5379,6 +5562,7 @@ namespace ProtobufTestMessages.Proto3 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (A != 0) {
             output.WriteRawTag(8);
@@ -5395,6 +5579,7 @@ namespace ProtobufTestMessages.Proto3 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (A != 0) {
@@ -5410,6 +5595,7 @@ namespace ProtobufTestMessages.Proto3 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -5427,6 +5613,7 @@ namespace ProtobufTestMessages.Proto3 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -5455,6 +5642,7 @@ namespace ProtobufTestMessages.Proto3 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -5493,19 +5681,23 @@ namespace ProtobufTestMessages.Proto3 {
     private static readonly pb::MessageParser<ForeignMessage> _parser = new pb::MessageParser<ForeignMessage>(() => new ForeignMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ForeignMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::ProtobufTestMessages.Proto3.TestMessagesProto3Reflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessage() {
       OnConstruction();
     }
@@ -5513,12 +5705,14 @@ namespace ProtobufTestMessages.Proto3 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessage(ForeignMessage other) : this() {
       c_ = other.c_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessage Clone() {
       return new ForeignMessage(this);
     }
@@ -5527,6 +5721,7 @@ namespace ProtobufTestMessages.Proto3 {
     public const int CFieldNumber = 1;
     private int c_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int C {
       get { return c_; }
       set {
@@ -5535,11 +5730,13 @@ namespace ProtobufTestMessages.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ForeignMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ForeignMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5552,6 +5749,7 @@ namespace ProtobufTestMessages.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (C != 0) hash ^= C.GetHashCode();
@@ -5562,11 +5760,13 @@ namespace ProtobufTestMessages.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5583,6 +5783,7 @@ namespace ProtobufTestMessages.Proto3 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (C != 0) {
         output.WriteRawTag(8);
@@ -5595,6 +5796,7 @@ namespace ProtobufTestMessages.Proto3 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (C != 0) {
@@ -5607,6 +5809,7 @@ namespace ProtobufTestMessages.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ForeignMessage other) {
       if (other == null) {
         return;
@@ -5618,6 +5821,7 @@ namespace ProtobufTestMessages.Proto3 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5639,6 +5843,7 @@ namespace ProtobufTestMessages.Proto3 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/Unittest.cs b/csharp/src/Google.Protobuf.Test.TestProtos/Unittest.cs
index a843c4ae8b..706b7c4736 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/Unittest.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/Unittest.cs
@@ -1130,19 +1130,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private int _hasBits0;
     private int _hasBits1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestAllTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypes() {
       OnConstruction();
     }
@@ -1150,6 +1154,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypes(TestAllTypes other) : this() {
       _hasBits0 = other._hasBits0;
       _hasBits1 = other._hasBits1;
@@ -1243,6 +1248,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypes Clone() {
       return new TestAllTypes(this);
     }
@@ -1256,6 +1262,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// Singular
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalInt32 {
       get { if ((_hasBits0 & 1) != 0) { return optionalInt32_; } else { return OptionalInt32DefaultValue; } }
       set {
@@ -1265,11 +1272,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_int32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalInt32 {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "optional_int32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalInt32() {
       _hasBits0 &= ~1;
     }
@@ -1280,6 +1289,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private long optionalInt64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalInt64 {
       get { if ((_hasBits0 & 2) != 0) { return optionalInt64_; } else { return OptionalInt64DefaultValue; } }
       set {
@@ -1289,11 +1299,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_int64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalInt64 {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "optional_int64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalInt64() {
       _hasBits0 &= ~2;
     }
@@ -1304,6 +1316,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private uint optionalUint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OptionalUint32 {
       get { if ((_hasBits0 & 4) != 0) { return optionalUint32_; } else { return OptionalUint32DefaultValue; } }
       set {
@@ -1313,11 +1326,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_uint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalUint32 {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "optional_uint32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalUint32() {
       _hasBits0 &= ~4;
     }
@@ -1328,6 +1343,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private ulong optionalUint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong OptionalUint64 {
       get { if ((_hasBits0 & 8) != 0) { return optionalUint64_; } else { return OptionalUint64DefaultValue; } }
       set {
@@ -1337,11 +1353,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_uint64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalUint64 {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "optional_uint64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalUint64() {
       _hasBits0 &= ~8;
     }
@@ -1352,6 +1370,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int optionalSint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalSint32 {
       get { if ((_hasBits0 & 16) != 0) { return optionalSint32_; } else { return OptionalSint32DefaultValue; } }
       set {
@@ -1361,11 +1380,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_sint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSint32 {
       get { return (_hasBits0 & 16) != 0; }
     }
     /// <summary>Clears the value of the "optional_sint32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSint32() {
       _hasBits0 &= ~16;
     }
@@ -1376,6 +1397,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private long optionalSint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalSint64 {
       get { if ((_hasBits0 & 32) != 0) { return optionalSint64_; } else { return OptionalSint64DefaultValue; } }
       set {
@@ -1385,11 +1407,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_sint64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSint64 {
       get { return (_hasBits0 & 32) != 0; }
     }
     /// <summary>Clears the value of the "optional_sint64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSint64() {
       _hasBits0 &= ~32;
     }
@@ -1400,6 +1424,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private uint optionalFixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OptionalFixed32 {
       get { if ((_hasBits0 & 64) != 0) { return optionalFixed32_; } else { return OptionalFixed32DefaultValue; } }
       set {
@@ -1409,11 +1434,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_fixed32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalFixed32 {
       get { return (_hasBits0 & 64) != 0; }
     }
     /// <summary>Clears the value of the "optional_fixed32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalFixed32() {
       _hasBits0 &= ~64;
     }
@@ -1424,6 +1451,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private ulong optionalFixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong OptionalFixed64 {
       get { if ((_hasBits0 & 128) != 0) { return optionalFixed64_; } else { return OptionalFixed64DefaultValue; } }
       set {
@@ -1433,11 +1461,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_fixed64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalFixed64 {
       get { return (_hasBits0 & 128) != 0; }
     }
     /// <summary>Clears the value of the "optional_fixed64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalFixed64() {
       _hasBits0 &= ~128;
     }
@@ -1448,6 +1478,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int optionalSfixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalSfixed32 {
       get { if ((_hasBits0 & 256) != 0) { return optionalSfixed32_; } else { return OptionalSfixed32DefaultValue; } }
       set {
@@ -1457,11 +1488,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_sfixed32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSfixed32 {
       get { return (_hasBits0 & 256) != 0; }
     }
     /// <summary>Clears the value of the "optional_sfixed32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSfixed32() {
       _hasBits0 &= ~256;
     }
@@ -1472,6 +1505,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private long optionalSfixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalSfixed64 {
       get { if ((_hasBits0 & 512) != 0) { return optionalSfixed64_; } else { return OptionalSfixed64DefaultValue; } }
       set {
@@ -1481,11 +1515,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_sfixed64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSfixed64 {
       get { return (_hasBits0 & 512) != 0; }
     }
     /// <summary>Clears the value of the "optional_sfixed64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSfixed64() {
       _hasBits0 &= ~512;
     }
@@ -1496,6 +1532,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float optionalFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float OptionalFloat {
       get { if ((_hasBits0 & 1024) != 0) { return optionalFloat_; } else { return OptionalFloatDefaultValue; } }
       set {
@@ -1505,11 +1542,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalFloat {
       get { return (_hasBits0 & 1024) != 0; }
     }
     /// <summary>Clears the value of the "optional_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalFloat() {
       _hasBits0 &= ~1024;
     }
@@ -1520,6 +1559,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private double optionalDouble_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double OptionalDouble {
       get { if ((_hasBits0 & 2048) != 0) { return optionalDouble_; } else { return OptionalDoubleDefaultValue; } }
       set {
@@ -1529,11 +1569,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_double" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalDouble {
       get { return (_hasBits0 & 2048) != 0; }
     }
     /// <summary>Clears the value of the "optional_double" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalDouble() {
       _hasBits0 &= ~2048;
     }
@@ -1544,6 +1586,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private bool optionalBool_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool OptionalBool {
       get { if ((_hasBits0 & 4096) != 0) { return optionalBool_; } else { return OptionalBoolDefaultValue; } }
       set {
@@ -1553,11 +1596,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_bool" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalBool {
       get { return (_hasBits0 & 4096) != 0; }
     }
     /// <summary>Clears the value of the "optional_bool" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalBool() {
       _hasBits0 &= ~4096;
     }
@@ -1568,6 +1613,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string optionalString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalString {
       get { return optionalString_ ?? OptionalStringDefaultValue; }
       set {
@@ -1576,11 +1622,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalString {
       get { return optionalString_ != null; }
     }
     /// <summary>Clears the value of the "optional_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalString() {
       optionalString_ = null;
     }
@@ -1591,6 +1639,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private pb::ByteString optionalBytes_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OptionalBytes {
       get { return optionalBytes_ ?? OptionalBytesDefaultValue; }
       set {
@@ -1599,11 +1648,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalBytes {
       get { return optionalBytes_ != null; }
     }
     /// <summary>Clears the value of the "optional_bytes" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalBytes() {
       optionalBytes_ = null;
     }
@@ -1612,6 +1663,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalGroupFieldNumber = 16;
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.OptionalGroup optionalGroup_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.OptionalGroup OptionalGroup {
       get { return optionalGroup_; }
       set {
@@ -1620,11 +1672,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the optionalgroup field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalGroup {
       get { return optionalGroup_ != null; }
     }
     /// <summary>Clears the value of the optionalgroup field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalGroup() {
       optionalGroup_ = null;
     }
@@ -1633,6 +1687,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalNestedMessageFieldNumber = 18;
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage optionalNestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage OptionalNestedMessage {
       get { return optionalNestedMessage_; }
       set {
@@ -1644,6 +1699,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalForeignMessageFieldNumber = 19;
     private global::Google.Protobuf.TestProtos.Proto2.ForeignMessage optionalForeignMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ForeignMessage OptionalForeignMessage {
       get { return optionalForeignMessage_; }
       set {
@@ -1655,6 +1711,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalImportMessageFieldNumber = 20;
     private global::Google.Protobuf.TestProtos.Proto2.ImportMessage optionalImportMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ImportMessage OptionalImportMessage {
       get { return optionalImportMessage_; }
       set {
@@ -1668,6 +1725,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedEnum optionalNestedEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedEnum OptionalNestedEnum {
       get { if ((_hasBits0 & 8192) != 0) { return optionalNestedEnum_; } else { return OptionalNestedEnumDefaultValue; } }
       set {
@@ -1677,11 +1735,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_nested_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalNestedEnum {
       get { return (_hasBits0 & 8192) != 0; }
     }
     /// <summary>Clears the value of the "optional_nested_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalNestedEnum() {
       _hasBits0 &= ~8192;
     }
@@ -1692,6 +1752,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.ForeignEnum optionalForeignEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ForeignEnum OptionalForeignEnum {
       get { if ((_hasBits0 & 16384) != 0) { return optionalForeignEnum_; } else { return OptionalForeignEnumDefaultValue; } }
       set {
@@ -1701,11 +1762,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_foreign_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalForeignEnum {
       get { return (_hasBits0 & 16384) != 0; }
     }
     /// <summary>Clears the value of the "optional_foreign_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalForeignEnum() {
       _hasBits0 &= ~16384;
     }
@@ -1716,6 +1779,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.ImportEnum optionalImportEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ImportEnum OptionalImportEnum {
       get { if ((_hasBits0 & 32768) != 0) { return optionalImportEnum_; } else { return OptionalImportEnumDefaultValue; } }
       set {
@@ -1725,11 +1789,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_import_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalImportEnum {
       get { return (_hasBits0 & 32768) != 0; }
     }
     /// <summary>Clears the value of the "optional_import_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalImportEnum() {
       _hasBits0 &= ~32768;
     }
@@ -1740,6 +1806,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string optionalStringPiece_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalStringPiece {
       get { return optionalStringPiece_ ?? OptionalStringPieceDefaultValue; }
       set {
@@ -1748,11 +1815,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_string_piece" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalStringPiece {
       get { return optionalStringPiece_ != null; }
     }
     /// <summary>Clears the value of the "optional_string_piece" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalStringPiece() {
       optionalStringPiece_ = null;
     }
@@ -1763,6 +1832,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string optionalCord_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalCord {
       get { return optionalCord_ ?? OptionalCordDefaultValue; }
       set {
@@ -1771,11 +1841,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_cord" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalCord {
       get { return optionalCord_ != null; }
     }
     /// <summary>Clears the value of the "optional_cord" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalCord() {
       optionalCord_ = null;
     }
@@ -1787,6 +1859,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// Defined in unittest_import_public.proto
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.PublicImportMessage OptionalPublicImportMessage {
       get { return optionalPublicImportMessage_; }
       set {
@@ -1798,6 +1871,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalLazyMessageFieldNumber = 27;
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage optionalLazyMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage OptionalLazyMessage {
       get { return optionalLazyMessage_; }
       set {
@@ -1814,6 +1888,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// Repeated
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedInt32 {
       get { return repeatedInt32_; }
     }
@@ -1824,6 +1899,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForInt64(256);
     private readonly pbc::RepeatedField<long> repeatedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedInt64 {
       get { return repeatedInt64_; }
     }
@@ -1834,6 +1910,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForUInt32(264);
     private readonly pbc::RepeatedField<uint> repeatedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> RepeatedUint32 {
       get { return repeatedUint32_; }
     }
@@ -1844,6 +1921,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForUInt64(272);
     private readonly pbc::RepeatedField<ulong> repeatedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedUint64 {
       get { return repeatedUint64_; }
     }
@@ -1854,6 +1932,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSInt32(280);
     private readonly pbc::RepeatedField<int> repeatedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedSint32 {
       get { return repeatedSint32_; }
     }
@@ -1864,6 +1943,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSInt64(288);
     private readonly pbc::RepeatedField<long> repeatedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedSint64 {
       get { return repeatedSint64_; }
     }
@@ -1874,6 +1954,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForFixed32(301);
     private readonly pbc::RepeatedField<uint> repeatedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> RepeatedFixed32 {
       get { return repeatedFixed32_; }
     }
@@ -1884,6 +1965,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForFixed64(305);
     private readonly pbc::RepeatedField<ulong> repeatedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedFixed64 {
       get { return repeatedFixed64_; }
     }
@@ -1894,6 +1976,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSFixed32(317);
     private readonly pbc::RepeatedField<int> repeatedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedSfixed32 {
       get { return repeatedSfixed32_; }
     }
@@ -1904,6 +1987,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSFixed64(321);
     private readonly pbc::RepeatedField<long> repeatedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedSfixed64 {
       get { return repeatedSfixed64_; }
     }
@@ -1914,6 +1998,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForFloat(333);
     private readonly pbc::RepeatedField<float> repeatedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> RepeatedFloat {
       get { return repeatedFloat_; }
     }
@@ -1924,6 +2009,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForDouble(337);
     private readonly pbc::RepeatedField<double> repeatedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> RepeatedDouble {
       get { return repeatedDouble_; }
     }
@@ -1934,6 +2020,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForBool(344);
     private readonly pbc::RepeatedField<bool> repeatedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> RepeatedBool {
       get { return repeatedBool_; }
     }
@@ -1944,6 +2031,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForString(354);
     private readonly pbc::RepeatedField<string> repeatedString_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedString {
       get { return repeatedString_; }
     }
@@ -1954,6 +2042,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForBytes(362);
     private readonly pbc::RepeatedField<pb::ByteString> repeatedBytes_ = new pbc::RepeatedField<pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<pb::ByteString> RepeatedBytes {
       get { return repeatedBytes_; }
     }
@@ -1964,6 +2053,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForGroup(371, 372, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.RepeatedGroup.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.RepeatedGroup> repeatedGroup_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.RepeatedGroup>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.RepeatedGroup> RepeatedGroup {
       get { return repeatedGroup_; }
     }
@@ -1974,6 +2064,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForMessage(386, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage> repeatedNestedMessage_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage> RepeatedNestedMessage {
       get { return repeatedNestedMessage_; }
     }
@@ -1984,6 +2075,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForMessage(394, global::Google.Protobuf.TestProtos.Proto2.ForeignMessage.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignMessage> repeatedForeignMessage_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignMessage> RepeatedForeignMessage {
       get { return repeatedForeignMessage_; }
     }
@@ -1994,6 +2086,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForMessage(402, global::Google.Protobuf.TestProtos.Proto2.ImportMessage.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ImportMessage> repeatedImportMessage_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ImportMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ImportMessage> RepeatedImportMessage {
       get { return repeatedImportMessage_; }
     }
@@ -2004,6 +2097,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForEnum(408, x => (int) x, x => (global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedEnum> repeatedNestedEnum_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedEnum> RepeatedNestedEnum {
       get { return repeatedNestedEnum_; }
     }
@@ -2014,6 +2108,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForEnum(416, x => (int) x, x => (global::Google.Protobuf.TestProtos.Proto2.ForeignEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum> repeatedForeignEnum_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum> RepeatedForeignEnum {
       get { return repeatedForeignEnum_; }
     }
@@ -2024,6 +2119,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForEnum(424, x => (int) x, x => (global::Google.Protobuf.TestProtos.Proto2.ImportEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ImportEnum> repeatedImportEnum_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ImportEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ImportEnum> RepeatedImportEnum {
       get { return repeatedImportEnum_; }
     }
@@ -2034,6 +2130,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForString(434);
     private readonly pbc::RepeatedField<string> repeatedStringPiece_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedStringPiece {
       get { return repeatedStringPiece_; }
     }
@@ -2044,6 +2141,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForString(442);
     private readonly pbc::RepeatedField<string> repeatedCord_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedCord {
       get { return repeatedCord_; }
     }
@@ -2054,6 +2152,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForMessage(458, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage> repeatedLazyMessage_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage> RepeatedLazyMessage {
       get { return repeatedLazyMessage_; }
     }
@@ -2067,6 +2166,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// Singular with defaults
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int DefaultInt32 {
       get { if ((_hasBits0 & 65536) != 0) { return defaultInt32_; } else { return DefaultInt32DefaultValue; } }
       set {
@@ -2076,11 +2176,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_int32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultInt32 {
       get { return (_hasBits0 & 65536) != 0; }
     }
     /// <summary>Clears the value of the "default_int32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultInt32() {
       _hasBits0 &= ~65536;
     }
@@ -2091,6 +2193,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private long defaultInt64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long DefaultInt64 {
       get { if ((_hasBits0 & 131072) != 0) { return defaultInt64_; } else { return DefaultInt64DefaultValue; } }
       set {
@@ -2100,11 +2203,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_int64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultInt64 {
       get { return (_hasBits0 & 131072) != 0; }
     }
     /// <summary>Clears the value of the "default_int64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultInt64() {
       _hasBits0 &= ~131072;
     }
@@ -2115,6 +2220,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private uint defaultUint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint DefaultUint32 {
       get { if ((_hasBits0 & 262144) != 0) { return defaultUint32_; } else { return DefaultUint32DefaultValue; } }
       set {
@@ -2124,11 +2230,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_uint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultUint32 {
       get { return (_hasBits0 & 262144) != 0; }
     }
     /// <summary>Clears the value of the "default_uint32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultUint32() {
       _hasBits0 &= ~262144;
     }
@@ -2139,6 +2247,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private ulong defaultUint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong DefaultUint64 {
       get { if ((_hasBits0 & 524288) != 0) { return defaultUint64_; } else { return DefaultUint64DefaultValue; } }
       set {
@@ -2148,11 +2257,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_uint64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultUint64 {
       get { return (_hasBits0 & 524288) != 0; }
     }
     /// <summary>Clears the value of the "default_uint64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultUint64() {
       _hasBits0 &= ~524288;
     }
@@ -2163,6 +2274,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int defaultSint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int DefaultSint32 {
       get { if ((_hasBits0 & 1048576) != 0) { return defaultSint32_; } else { return DefaultSint32DefaultValue; } }
       set {
@@ -2172,11 +2284,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_sint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultSint32 {
       get { return (_hasBits0 & 1048576) != 0; }
     }
     /// <summary>Clears the value of the "default_sint32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultSint32() {
       _hasBits0 &= ~1048576;
     }
@@ -2187,6 +2301,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private long defaultSint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long DefaultSint64 {
       get { if ((_hasBits0 & 2097152) != 0) { return defaultSint64_; } else { return DefaultSint64DefaultValue; } }
       set {
@@ -2196,11 +2311,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_sint64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultSint64 {
       get { return (_hasBits0 & 2097152) != 0; }
     }
     /// <summary>Clears the value of the "default_sint64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultSint64() {
       _hasBits0 &= ~2097152;
     }
@@ -2211,6 +2328,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private uint defaultFixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint DefaultFixed32 {
       get { if ((_hasBits0 & 4194304) != 0) { return defaultFixed32_; } else { return DefaultFixed32DefaultValue; } }
       set {
@@ -2220,11 +2338,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_fixed32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultFixed32 {
       get { return (_hasBits0 & 4194304) != 0; }
     }
     /// <summary>Clears the value of the "default_fixed32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultFixed32() {
       _hasBits0 &= ~4194304;
     }
@@ -2235,6 +2355,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private ulong defaultFixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong DefaultFixed64 {
       get { if ((_hasBits0 & 8388608) != 0) { return defaultFixed64_; } else { return DefaultFixed64DefaultValue; } }
       set {
@@ -2244,11 +2365,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_fixed64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultFixed64 {
       get { return (_hasBits0 & 8388608) != 0; }
     }
     /// <summary>Clears the value of the "default_fixed64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultFixed64() {
       _hasBits0 &= ~8388608;
     }
@@ -2259,6 +2382,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int defaultSfixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int DefaultSfixed32 {
       get { if ((_hasBits0 & 16777216) != 0) { return defaultSfixed32_; } else { return DefaultSfixed32DefaultValue; } }
       set {
@@ -2268,11 +2392,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_sfixed32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultSfixed32 {
       get { return (_hasBits0 & 16777216) != 0; }
     }
     /// <summary>Clears the value of the "default_sfixed32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultSfixed32() {
       _hasBits0 &= ~16777216;
     }
@@ -2283,6 +2409,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private long defaultSfixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long DefaultSfixed64 {
       get { if ((_hasBits0 & 33554432) != 0) { return defaultSfixed64_; } else { return DefaultSfixed64DefaultValue; } }
       set {
@@ -2292,11 +2419,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_sfixed64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultSfixed64 {
       get { return (_hasBits0 & 33554432) != 0; }
     }
     /// <summary>Clears the value of the "default_sfixed64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultSfixed64() {
       _hasBits0 &= ~33554432;
     }
@@ -2307,6 +2436,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float defaultFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float DefaultFloat {
       get { if ((_hasBits0 & 67108864) != 0) { return defaultFloat_; } else { return DefaultFloatDefaultValue; } }
       set {
@@ -2316,11 +2446,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultFloat {
       get { return (_hasBits0 & 67108864) != 0; }
     }
     /// <summary>Clears the value of the "default_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultFloat() {
       _hasBits0 &= ~67108864;
     }
@@ -2331,6 +2463,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private double defaultDouble_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DefaultDouble {
       get { if ((_hasBits0 & 134217728) != 0) { return defaultDouble_; } else { return DefaultDoubleDefaultValue; } }
       set {
@@ -2340,11 +2473,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_double" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultDouble {
       get { return (_hasBits0 & 134217728) != 0; }
     }
     /// <summary>Clears the value of the "default_double" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultDouble() {
       _hasBits0 &= ~134217728;
     }
@@ -2355,6 +2490,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private bool defaultBool_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool DefaultBool {
       get { if ((_hasBits0 & 268435456) != 0) { return defaultBool_; } else { return DefaultBoolDefaultValue; } }
       set {
@@ -2364,11 +2500,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_bool" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultBool {
       get { return (_hasBits0 & 268435456) != 0; }
     }
     /// <summary>Clears the value of the "default_bool" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultBool() {
       _hasBits0 &= ~268435456;
     }
@@ -2379,6 +2517,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string defaultString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string DefaultString {
       get { return defaultString_ ?? DefaultStringDefaultValue; }
       set {
@@ -2387,11 +2526,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultString {
       get { return defaultString_ != null; }
     }
     /// <summary>Clears the value of the "default_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultString() {
       defaultString_ = null;
     }
@@ -2402,6 +2543,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private pb::ByteString defaultBytes_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString DefaultBytes {
       get { return defaultBytes_ ?? DefaultBytesDefaultValue; }
       set {
@@ -2410,11 +2552,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultBytes {
       get { return defaultBytes_ != null; }
     }
     /// <summary>Clears the value of the "default_bytes" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultBytes() {
       defaultBytes_ = null;
     }
@@ -2425,6 +2569,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedEnum defaultNestedEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedEnum DefaultNestedEnum {
       get { if ((_hasBits0 & 536870912) != 0) { return defaultNestedEnum_; } else { return DefaultNestedEnumDefaultValue; } }
       set {
@@ -2434,11 +2579,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_nested_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultNestedEnum {
       get { return (_hasBits0 & 536870912) != 0; }
     }
     /// <summary>Clears the value of the "default_nested_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultNestedEnum() {
       _hasBits0 &= ~536870912;
     }
@@ -2449,6 +2596,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.ForeignEnum defaultForeignEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ForeignEnum DefaultForeignEnum {
       get { if ((_hasBits0 & 1073741824) != 0) { return defaultForeignEnum_; } else { return DefaultForeignEnumDefaultValue; } }
       set {
@@ -2458,11 +2606,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_foreign_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultForeignEnum {
       get { return (_hasBits0 & 1073741824) != 0; }
     }
     /// <summary>Clears the value of the "default_foreign_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultForeignEnum() {
       _hasBits0 &= ~1073741824;
     }
@@ -2473,6 +2623,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.ImportEnum defaultImportEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ImportEnum DefaultImportEnum {
       get { if ((_hasBits0 & -2147483648) != 0) { return defaultImportEnum_; } else { return DefaultImportEnumDefaultValue; } }
       set {
@@ -2482,11 +2633,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_import_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultImportEnum {
       get { return (_hasBits0 & -2147483648) != 0; }
     }
     /// <summary>Clears the value of the "default_import_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultImportEnum() {
       _hasBits0 &= ~-2147483648;
     }
@@ -2497,6 +2650,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string defaultStringPiece_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string DefaultStringPiece {
       get { return defaultStringPiece_ ?? DefaultStringPieceDefaultValue; }
       set {
@@ -2505,11 +2659,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_string_piece" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultStringPiece {
       get { return defaultStringPiece_ != null; }
     }
     /// <summary>Clears the value of the "default_string_piece" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultStringPiece() {
       defaultStringPiece_ = null;
     }
@@ -2520,6 +2676,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string defaultCord_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string DefaultCord {
       get { return defaultCord_ ?? DefaultCordDefaultValue; }
       set {
@@ -2528,11 +2685,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "default_cord" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultCord {
       get { return defaultCord_ != null; }
     }
     /// <summary>Clears the value of the "default_cord" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultCord() {
       defaultCord_ = null;
     }
@@ -2540,6 +2699,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "oneof_uint32" field.</summary>
     public const int OneofUint32FieldNumber = 111;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OneofUint32 {
       get { return HasOneofUint32 ? (uint) oneofField_ : 0; }
       set {
@@ -2549,11 +2709,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "oneof_uint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofUint32 {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofUint32; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_uint32" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofUint32() {
       if (HasOneofUint32) {
         ClearOneofField();
@@ -2563,6 +2725,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "oneof_nested_message" field.</summary>
     public const int OneofNestedMessageFieldNumber = 112;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage OneofNestedMessage {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofNestedMessage ? (global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage) oneofField_ : null; }
       set {
@@ -2574,6 +2737,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "oneof_string" field.</summary>
     public const int OneofStringFieldNumber = 113;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OneofString {
       get { return HasOneofString ? (string) oneofField_ : ""; }
       set {
@@ -2583,11 +2747,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "oneof_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofString {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofString; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_string" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofString() {
       if (HasOneofString) {
         ClearOneofField();
@@ -2597,6 +2763,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "oneof_bytes" field.</summary>
     public const int OneofBytesFieldNumber = 114;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OneofBytes {
       get { return HasOneofBytes ? (pb::ByteString) oneofField_ : pb::ByteString.Empty; }
       set {
@@ -2606,11 +2773,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "oneof_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofBytes {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofBytes; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_bytes" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofBytes() {
       if (HasOneofBytes) {
         ClearOneofField();
@@ -2628,22 +2797,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     private OneofFieldOneofCase oneofFieldCase_ = OneofFieldOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofFieldOneofCase OneofFieldCase {
       get { return oneofFieldCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofField() {
       oneofFieldCase_ = OneofFieldOneofCase.None;
       oneofField_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestAllTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestAllTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2731,6 +2904,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasOptionalInt32) hash ^= OptionalInt32.GetHashCode();
@@ -2816,11 +2990,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3059,6 +3235,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasOptionalInt32) {
         output.WriteRawTag(8);
@@ -3293,6 +3470,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasOptionalInt32) {
@@ -3477,6 +3655,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestAllTypes other) {
       if (other == null) {
         return;
@@ -3684,6 +3863,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -4040,6 +4220,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -4394,6 +4575,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestAllTypes message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum NestedEnum {
         [pbr::OriginalName("FOO")] Foo = 1,
@@ -4414,19 +4596,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -4434,6 +4620,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           _hasBits0 = other._hasBits0;
           bb_ = other.bb_;
@@ -4441,6 +4628,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -4456,6 +4644,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         /// This file needs to compile in proto1 to test backwards-compatibility.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Bb {
           get { if ((_hasBits0 & 1) != 0) { return bb_; } else { return BbDefaultValue; } }
           set {
@@ -4465,21 +4654,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "bb" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasBb {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "bb" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearBb() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -4492,6 +4685,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasBb) hash ^= Bb.GetHashCode();
@@ -4502,11 +4696,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -4523,6 +4719,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasBb) {
             output.WriteRawTag(8);
@@ -4535,6 +4732,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasBb) {
@@ -4547,6 +4745,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -4558,6 +4757,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -4579,6 +4779,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -4606,19 +4807,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<OptionalGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Descriptor.NestedTypes[1]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup() {
           OnConstruction();
         }
@@ -4626,6 +4831,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup(OptionalGroup other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -4633,6 +4839,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup Clone() {
           return new OptionalGroup(this);
         }
@@ -4643,6 +4850,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -4652,21 +4860,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as OptionalGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(OptionalGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -4679,6 +4891,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -4689,11 +4902,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -4710,6 +4925,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(136, 1);
@@ -4722,6 +4938,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -4734,6 +4951,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(OptionalGroup other) {
           if (other == null) {
             return;
@@ -4745,6 +4963,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -4768,6 +4987,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -4797,19 +5017,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<RepeatedGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Descriptor.NestedTypes[2]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public RepeatedGroup() {
           OnConstruction();
         }
@@ -4817,6 +5041,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public RepeatedGroup(RepeatedGroup other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -4824,6 +5049,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public RepeatedGroup Clone() {
           return new RepeatedGroup(this);
         }
@@ -4834,6 +5060,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -4843,21 +5070,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as RepeatedGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(RepeatedGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -4870,6 +5101,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -4880,11 +5112,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -4901,6 +5135,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(248, 2);
@@ -4913,6 +5148,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -4925,6 +5161,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(RepeatedGroup other) {
           if (other == null) {
             return;
@@ -4936,6 +5173,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -4959,6 +5197,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -4995,19 +5234,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<NestedTestAllTypes> _parser = new pb::MessageParser<NestedTestAllTypes>(() => new NestedTestAllTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<NestedTestAllTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NestedTestAllTypes() {
       OnConstruction();
     }
@@ -5015,6 +5258,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NestedTestAllTypes(NestedTestAllTypes other) : this() {
       child_ = other.child_ != null ? other.child_.Clone() : null;
       payload_ = other.payload_ != null ? other.payload_.Clone() : null;
@@ -5023,6 +5267,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NestedTestAllTypes Clone() {
       return new NestedTestAllTypes(this);
     }
@@ -5031,6 +5276,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int ChildFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.NestedTestAllTypes child_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.NestedTestAllTypes Child {
       get { return child_; }
       set {
@@ -5042,6 +5288,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int PayloadFieldNumber = 2;
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes payload_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes Payload {
       get { return payload_; }
       set {
@@ -5055,16 +5302,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForMessage(26, global::Google.Protobuf.TestProtos.Proto2.NestedTestAllTypes.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.NestedTestAllTypes> repeatedChild_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.NestedTestAllTypes>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.NestedTestAllTypes> RepeatedChild {
       get { return repeatedChild_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as NestedTestAllTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(NestedTestAllTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5079,6 +5329,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (child_ != null) hash ^= Child.GetHashCode();
@@ -5091,11 +5342,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5117,6 +5370,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (child_ != null) {
         output.WriteRawTag(10);
@@ -5134,6 +5388,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (child_ != null) {
@@ -5150,6 +5405,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(NestedTestAllTypes other) {
       if (other == null) {
         return;
@@ -5171,6 +5427,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5206,6 +5463,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5247,19 +5505,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestDeprecatedFields> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDeprecatedFields() {
       OnConstruction();
     }
@@ -5267,6 +5529,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDeprecatedFields(TestDeprecatedFields other) : this() {
       _hasBits0 = other._hasBits0;
       deprecatedInt32_ = other.deprecatedInt32_;
@@ -5280,6 +5543,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDeprecatedFields Clone() {
       return new TestDeprecatedFields(this);
     }
@@ -5291,6 +5555,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private int deprecatedInt32_;
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int DeprecatedInt32 {
       get { if ((_hasBits0 & 1) != 0) { return deprecatedInt32_; } else { return DeprecatedInt32DefaultValue; } }
       set {
@@ -5301,12 +5566,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Gets whether the "deprecated_int32" field is set</summary>
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDeprecatedInt32 {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "deprecated_int32" field</summary>
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDeprecatedInt32() {
       _hasBits0 &= ~1;
     }
@@ -5315,6 +5582,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int DeprecatedInt32InOneofFieldNumber = 2;
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int DeprecatedInt32InOneof {
       get { return HasDeprecatedInt32InOneof ? (int) oneofFields_ : 0; }
       set {
@@ -5325,12 +5593,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Gets whether the "deprecated_int32_in_oneof" field is set</summary>
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDeprecatedInt32InOneof {
       get { return oneofFieldsCase_ == OneofFieldsOneofCase.DeprecatedInt32InOneof; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "deprecated_int32_in_oneof" </summary>
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDeprecatedInt32InOneof() {
       if (HasDeprecatedInt32InOneof) {
         ClearOneofFields();
@@ -5345,22 +5615,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     private OneofFieldsOneofCase oneofFieldsCase_ = OneofFieldsOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofFieldsOneofCase OneofFieldsCase {
       get { return oneofFieldsCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofFields() {
       oneofFieldsCase_ = OneofFieldsOneofCase.None;
       oneofFields_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestDeprecatedFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestDeprecatedFields other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5375,6 +5649,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasDeprecatedInt32) hash ^= DeprecatedInt32.GetHashCode();
@@ -5387,11 +5662,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5412,6 +5689,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasDeprecatedInt32) {
         output.WriteRawTag(8);
@@ -5428,6 +5706,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasDeprecatedInt32) {
@@ -5443,6 +5722,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestDeprecatedFields other) {
       if (other == null) {
         return;
@@ -5460,6 +5740,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5485,6 +5766,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5516,19 +5798,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestDeprecatedMessage> _parser = new pb::MessageParser<TestDeprecatedMessage>(() => new TestDeprecatedMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestDeprecatedMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[3]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDeprecatedMessage() {
       OnConstruction();
     }
@@ -5536,21 +5822,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDeprecatedMessage(TestDeprecatedMessage other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDeprecatedMessage Clone() {
       return new TestDeprecatedMessage(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestDeprecatedMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestDeprecatedMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5562,6 +5852,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -5571,11 +5862,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5588,6 +5881,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -5596,6 +5890,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -5605,6 +5900,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestDeprecatedMessage other) {
       if (other == null) {
         return;
@@ -5613,6 +5909,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5630,6 +5927,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5657,19 +5955,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ForeignMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[4]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessage() {
       OnConstruction();
     }
@@ -5677,6 +5979,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessage(ForeignMessage other) : this() {
       _hasBits0 = other._hasBits0;
       c_ = other.c_;
@@ -5685,6 +5988,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessage Clone() {
       return new ForeignMessage(this);
     }
@@ -5695,6 +5999,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int c_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int C {
       get { if ((_hasBits0 & 1) != 0) { return c_; } else { return CDefaultValue; } }
       set {
@@ -5704,11 +6009,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "c" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasC {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "c" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearC() {
       _hasBits0 &= ~1;
     }
@@ -5719,6 +6026,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int d_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int D {
       get { if ((_hasBits0 & 2) != 0) { return d_; } else { return DDefaultValue; } }
       set {
@@ -5728,21 +6036,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "d" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasD {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "d" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearD() {
       _hasBits0 &= ~2;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ForeignMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ForeignMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5756,6 +6068,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasC) hash ^= C.GetHashCode();
@@ -5767,11 +6080,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5792,6 +6107,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasC) {
         output.WriteRawTag(8);
@@ -5808,6 +6124,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasC) {
@@ -5823,6 +6140,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ForeignMessage other) {
       if (other == null) {
         return;
@@ -5837,6 +6155,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5862,6 +6181,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5892,19 +6212,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestReservedFields> _parser = new pb::MessageParser<TestReservedFields>(() => new TestReservedFields());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestReservedFields> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[5]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReservedFields() {
       OnConstruction();
     }
@@ -5912,21 +6236,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReservedFields(TestReservedFields other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReservedFields Clone() {
       return new TestReservedFields(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestReservedFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestReservedFields other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5938,6 +6266,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -5947,11 +6276,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5964,6 +6295,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -5972,6 +6304,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -5981,6 +6314,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestReservedFields other) {
       if (other == null) {
         return;
@@ -5989,6 +6323,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6006,6 +6341,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6030,19 +6366,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::ExtensionSet<TestAllExtensions> _extensions;
     private pb::ExtensionSet<TestAllExtensions> _Extensions { get { return _extensions; } }
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestAllExtensions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[6]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllExtensions() {
       OnConstruction();
     }
@@ -6050,22 +6390,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllExtensions(TestAllExtensions other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
       _extensions = pb::ExtensionSet.Clone(other._extensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllExtensions Clone() {
       return new TestAllExtensions(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestAllExtensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestAllExtensions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6080,6 +6424,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_extensions != null) {
@@ -6092,11 +6437,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6112,6 +6459,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_extensions != null) {
         _extensions.WriteTo(ref output);
@@ -6123,6 +6471,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_extensions != null) {
@@ -6135,6 +6484,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestAllExtensions other) {
       if (other == null) {
         return;
@@ -6144,6 +6494,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6163,6 +6514,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6210,19 +6562,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<OptionalGroup_extension> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[7]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OptionalGroup_extension() {
       OnConstruction();
     }
@@ -6230,6 +6586,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OptionalGroup_extension(OptionalGroup_extension other) : this() {
       _hasBits0 = other._hasBits0;
       a_ = other.a_;
@@ -6237,6 +6594,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OptionalGroup_extension Clone() {
       return new OptionalGroup_extension(this);
     }
@@ -6247,6 +6605,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int a_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int A {
       get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
       set {
@@ -6256,21 +6615,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "a" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasA {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "a" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearA() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as OptionalGroup_extension);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(OptionalGroup_extension other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6283,6 +6646,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasA) hash ^= A.GetHashCode();
@@ -6293,11 +6657,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6314,6 +6680,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasA) {
         output.WriteRawTag(136, 1);
@@ -6326,6 +6693,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasA) {
@@ -6338,6 +6706,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(OptionalGroup_extension other) {
       if (other == null) {
         return;
@@ -6349,6 +6718,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6372,6 +6742,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6401,19 +6772,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<RepeatedGroup_extension> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[8]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public RepeatedGroup_extension() {
       OnConstruction();
     }
@@ -6421,6 +6796,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public RepeatedGroup_extension(RepeatedGroup_extension other) : this() {
       _hasBits0 = other._hasBits0;
       a_ = other.a_;
@@ -6428,6 +6804,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public RepeatedGroup_extension Clone() {
       return new RepeatedGroup_extension(this);
     }
@@ -6438,6 +6815,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int a_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int A {
       get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
       set {
@@ -6447,21 +6825,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "a" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasA {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "a" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearA() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as RepeatedGroup_extension);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(RepeatedGroup_extension other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6474,6 +6856,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasA) hash ^= A.GetHashCode();
@@ -6484,11 +6867,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6505,6 +6890,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasA) {
         output.WriteRawTag(248, 2);
@@ -6517,6 +6903,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasA) {
@@ -6529,6 +6916,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(RepeatedGroup_extension other) {
       if (other == null) {
         return;
@@ -6540,6 +6928,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6563,6 +6952,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6592,19 +6982,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestGroup> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[9]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestGroup() {
       OnConstruction();
     }
@@ -6612,6 +7006,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestGroup(TestGroup other) : this() {
       _hasBits0 = other._hasBits0;
       optionalGroup_ = other.HasOptionalGroup ? other.optionalGroup_.Clone() : null;
@@ -6620,6 +7015,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestGroup Clone() {
       return new TestGroup(this);
     }
@@ -6628,6 +7024,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalGroupFieldNumber = 16;
     private global::Google.Protobuf.TestProtos.Proto2.TestGroup.Types.OptionalGroup optionalGroup_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestGroup.Types.OptionalGroup OptionalGroup {
       get { return optionalGroup_; }
       set {
@@ -6636,11 +7033,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the optionalgroup field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalGroup {
       get { return optionalGroup_ != null; }
     }
     /// <summary>Clears the value of the optionalgroup field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalGroup() {
       optionalGroup_ = null;
     }
@@ -6651,6 +7050,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.ForeignEnum optionalForeignEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ForeignEnum OptionalForeignEnum {
       get { if ((_hasBits0 & 1) != 0) { return optionalForeignEnum_; } else { return OptionalForeignEnumDefaultValue; } }
       set {
@@ -6660,21 +7060,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_foreign_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalForeignEnum {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "optional_foreign_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalForeignEnum() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestGroup);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestGroup other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6688,6 +7092,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasOptionalGroup) hash ^= OptionalGroup.GetHashCode();
@@ -6699,11 +7104,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6725,6 +7132,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasOptionalGroup) {
         output.WriteRawTag(131, 1);
@@ -6742,6 +7150,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasOptionalGroup) {
@@ -6757,6 +7166,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestGroup other) {
       if (other == null) {
         return;
@@ -6774,6 +7184,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6802,6 +7213,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6828,6 +7240,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestGroup message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class OptionalGroup : pb::IMessage<OptionalGroup>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -6838,19 +7251,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<OptionalGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestGroup.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup() {
           OnConstruction();
         }
@@ -6858,6 +7275,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup(OptionalGroup other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -6865,6 +7283,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup Clone() {
           return new OptionalGroup(this);
         }
@@ -6875,6 +7294,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -6884,21 +7304,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as OptionalGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(OptionalGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -6911,6 +7335,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -6921,11 +7346,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -6942,6 +7369,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(136, 1);
@@ -6954,6 +7382,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -6966,6 +7395,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(OptionalGroup other) {
           if (other == null) {
             return;
@@ -6977,6 +7407,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -7000,6 +7431,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -7035,19 +7467,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::ExtensionSet<TestGroupExtension> _extensions;
     private pb::ExtensionSet<TestGroupExtension> _Extensions { get { return _extensions; } }
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestGroupExtension> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[10]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestGroupExtension() {
       OnConstruction();
     }
@@ -7055,22 +7491,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestGroupExtension(TestGroupExtension other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
       _extensions = pb::ExtensionSet.Clone(other._extensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestGroupExtension Clone() {
       return new TestGroupExtension(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestGroupExtension);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestGroupExtension other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -7085,6 +7525,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_extensions != null) {
@@ -7097,11 +7538,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -7117,6 +7560,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_extensions != null) {
         _extensions.WriteTo(ref output);
@@ -7128,6 +7572,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_extensions != null) {
@@ -7140,6 +7585,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestGroupExtension other) {
       if (other == null) {
         return;
@@ -7149,6 +7595,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -7168,6 +7615,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -7214,19 +7662,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestNestedExtension> _parser = new pb::MessageParser<TestNestedExtension>(() => new TestNestedExtension());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestNestedExtension> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[11]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestNestedExtension() {
       OnConstruction();
     }
@@ -7234,21 +7686,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestNestedExtension(TestNestedExtension other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestNestedExtension Clone() {
       return new TestNestedExtension(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestNestedExtension);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestNestedExtension other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -7260,6 +7716,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -7269,11 +7726,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -7286,6 +7745,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -7294,6 +7754,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -7303,6 +7764,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestNestedExtension other) {
       if (other == null) {
         return;
@@ -7311,6 +7773,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -7328,6 +7791,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -7343,6 +7807,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestNestedExtension message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class OptionalGroup_extension : pb::IMessage<OptionalGroup_extension>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -7353,19 +7818,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<OptionalGroup_extension> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestNestedExtension.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup_extension() {
           OnConstruction();
         }
@@ -7373,6 +7842,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup_extension(OptionalGroup_extension other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -7380,6 +7850,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup_extension Clone() {
           return new OptionalGroup_extension(this);
         }
@@ -7390,6 +7861,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -7399,21 +7871,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as OptionalGroup_extension);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(OptionalGroup_extension other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -7426,6 +7902,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -7436,11 +7913,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -7457,6 +7936,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(136, 1);
@@ -7469,6 +7949,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -7481,6 +7962,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(OptionalGroup_extension other) {
           if (other == null) {
             return;
@@ -7492,6 +7974,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -7515,6 +7998,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -7541,6 +8025,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Extensions
     /// <summary>Container for extensions for other messages declared in the TestNestedExtension message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Extensions {
       /// <summary>
       /// Check for bug where string extensions declared in tested scope did not
@@ -7580,19 +8065,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private int _hasBits0;
     private int _hasBits1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestRequired> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[12]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequired() {
       OnConstruction();
     }
@@ -7600,6 +8089,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequired(TestRequired other) : this() {
       _hasBits0 = other._hasBits0;
       _hasBits1 = other._hasBits1;
@@ -7640,6 +8130,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequired Clone() {
       return new TestRequired(this);
     }
@@ -7650,6 +8141,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int a_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int A {
       get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
       set {
@@ -7659,11 +8151,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "a" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasA {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "a" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearA() {
       _hasBits0 &= ~1;
     }
@@ -7674,6 +8168,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy2_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy2 {
       get { if ((_hasBits0 & 2) != 0) { return dummy2_; } else { return Dummy2DefaultValue; } }
       set {
@@ -7683,11 +8178,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy2" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy2 {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "dummy2" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy2() {
       _hasBits0 &= ~2;
     }
@@ -7698,6 +8195,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int b_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int B {
       get { if ((_hasBits0 & 4) != 0) { return b_; } else { return BDefaultValue; } }
       set {
@@ -7707,11 +8205,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "b" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasB {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "b" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearB() {
       _hasBits0 &= ~4;
     }
@@ -7726,6 +8226,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// properly checks multiple elements of has_bits_.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy4 {
       get { if ((_hasBits0 & 8) != 0) { return dummy4_; } else { return Dummy4DefaultValue; } }
       set {
@@ -7735,11 +8236,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy4" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy4 {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "dummy4" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy4() {
       _hasBits0 &= ~8;
     }
@@ -7750,6 +8253,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy5_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy5 {
       get { if ((_hasBits0 & 16) != 0) { return dummy5_; } else { return Dummy5DefaultValue; } }
       set {
@@ -7759,11 +8263,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy5" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy5 {
       get { return (_hasBits0 & 16) != 0; }
     }
     /// <summary>Clears the value of the "dummy5" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy5() {
       _hasBits0 &= ~16;
     }
@@ -7774,6 +8280,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy6_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy6 {
       get { if ((_hasBits0 & 32) != 0) { return dummy6_; } else { return Dummy6DefaultValue; } }
       set {
@@ -7783,11 +8290,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy6" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy6 {
       get { return (_hasBits0 & 32) != 0; }
     }
     /// <summary>Clears the value of the "dummy6" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy6() {
       _hasBits0 &= ~32;
     }
@@ -7798,6 +8307,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy7_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy7 {
       get { if ((_hasBits0 & 64) != 0) { return dummy7_; } else { return Dummy7DefaultValue; } }
       set {
@@ -7807,11 +8317,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy7" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy7 {
       get { return (_hasBits0 & 64) != 0; }
     }
     /// <summary>Clears the value of the "dummy7" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy7() {
       _hasBits0 &= ~64;
     }
@@ -7822,6 +8334,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy8_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy8 {
       get { if ((_hasBits0 & 128) != 0) { return dummy8_; } else { return Dummy8DefaultValue; } }
       set {
@@ -7831,11 +8344,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy8" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy8 {
       get { return (_hasBits0 & 128) != 0; }
     }
     /// <summary>Clears the value of the "dummy8" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy8() {
       _hasBits0 &= ~128;
     }
@@ -7846,6 +8361,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy9_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy9 {
       get { if ((_hasBits0 & 256) != 0) { return dummy9_; } else { return Dummy9DefaultValue; } }
       set {
@@ -7855,11 +8371,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy9" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy9 {
       get { return (_hasBits0 & 256) != 0; }
     }
     /// <summary>Clears the value of the "dummy9" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy9() {
       _hasBits0 &= ~256;
     }
@@ -7870,6 +8388,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy10_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy10 {
       get { if ((_hasBits0 & 512) != 0) { return dummy10_; } else { return Dummy10DefaultValue; } }
       set {
@@ -7879,11 +8398,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy10" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy10 {
       get { return (_hasBits0 & 512) != 0; }
     }
     /// <summary>Clears the value of the "dummy10" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy10() {
       _hasBits0 &= ~512;
     }
@@ -7894,6 +8415,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy11_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy11 {
       get { if ((_hasBits0 & 1024) != 0) { return dummy11_; } else { return Dummy11DefaultValue; } }
       set {
@@ -7903,11 +8425,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy11" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy11 {
       get { return (_hasBits0 & 1024) != 0; }
     }
     /// <summary>Clears the value of the "dummy11" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy11() {
       _hasBits0 &= ~1024;
     }
@@ -7918,6 +8442,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy12_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy12 {
       get { if ((_hasBits0 & 2048) != 0) { return dummy12_; } else { return Dummy12DefaultValue; } }
       set {
@@ -7927,11 +8452,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy12" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy12 {
       get { return (_hasBits0 & 2048) != 0; }
     }
     /// <summary>Clears the value of the "dummy12" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy12() {
       _hasBits0 &= ~2048;
     }
@@ -7942,6 +8469,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy13_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy13 {
       get { if ((_hasBits0 & 4096) != 0) { return dummy13_; } else { return Dummy13DefaultValue; } }
       set {
@@ -7951,11 +8479,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy13" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy13 {
       get { return (_hasBits0 & 4096) != 0; }
     }
     /// <summary>Clears the value of the "dummy13" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy13() {
       _hasBits0 &= ~4096;
     }
@@ -7966,6 +8496,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy14_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy14 {
       get { if ((_hasBits0 & 8192) != 0) { return dummy14_; } else { return Dummy14DefaultValue; } }
       set {
@@ -7975,11 +8506,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy14" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy14 {
       get { return (_hasBits0 & 8192) != 0; }
     }
     /// <summary>Clears the value of the "dummy14" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy14() {
       _hasBits0 &= ~8192;
     }
@@ -7990,6 +8523,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy15_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy15 {
       get { if ((_hasBits0 & 16384) != 0) { return dummy15_; } else { return Dummy15DefaultValue; } }
       set {
@@ -7999,11 +8533,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy15" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy15 {
       get { return (_hasBits0 & 16384) != 0; }
     }
     /// <summary>Clears the value of the "dummy15" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy15() {
       _hasBits0 &= ~16384;
     }
@@ -8014,6 +8550,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy16_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy16 {
       get { if ((_hasBits0 & 32768) != 0) { return dummy16_; } else { return Dummy16DefaultValue; } }
       set {
@@ -8023,11 +8560,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy16" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy16 {
       get { return (_hasBits0 & 32768) != 0; }
     }
     /// <summary>Clears the value of the "dummy16" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy16() {
       _hasBits0 &= ~32768;
     }
@@ -8038,6 +8577,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy17_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy17 {
       get { if ((_hasBits0 & 65536) != 0) { return dummy17_; } else { return Dummy17DefaultValue; } }
       set {
@@ -8047,11 +8587,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy17" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy17 {
       get { return (_hasBits0 & 65536) != 0; }
     }
     /// <summary>Clears the value of the "dummy17" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy17() {
       _hasBits0 &= ~65536;
     }
@@ -8062,6 +8604,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy18_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy18 {
       get { if ((_hasBits0 & 131072) != 0) { return dummy18_; } else { return Dummy18DefaultValue; } }
       set {
@@ -8071,11 +8614,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy18" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy18 {
       get { return (_hasBits0 & 131072) != 0; }
     }
     /// <summary>Clears the value of the "dummy18" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy18() {
       _hasBits0 &= ~131072;
     }
@@ -8086,6 +8631,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy19_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy19 {
       get { if ((_hasBits0 & 262144) != 0) { return dummy19_; } else { return Dummy19DefaultValue; } }
       set {
@@ -8095,11 +8641,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy19" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy19 {
       get { return (_hasBits0 & 262144) != 0; }
     }
     /// <summary>Clears the value of the "dummy19" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy19() {
       _hasBits0 &= ~262144;
     }
@@ -8110,6 +8658,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy20_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy20 {
       get { if ((_hasBits0 & 524288) != 0) { return dummy20_; } else { return Dummy20DefaultValue; } }
       set {
@@ -8119,11 +8668,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy20" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy20 {
       get { return (_hasBits0 & 524288) != 0; }
     }
     /// <summary>Clears the value of the "dummy20" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy20() {
       _hasBits0 &= ~524288;
     }
@@ -8134,6 +8685,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy21_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy21 {
       get { if ((_hasBits0 & 1048576) != 0) { return dummy21_; } else { return Dummy21DefaultValue; } }
       set {
@@ -8143,11 +8695,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy21" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy21 {
       get { return (_hasBits0 & 1048576) != 0; }
     }
     /// <summary>Clears the value of the "dummy21" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy21() {
       _hasBits0 &= ~1048576;
     }
@@ -8158,6 +8712,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy22_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy22 {
       get { if ((_hasBits0 & 2097152) != 0) { return dummy22_; } else { return Dummy22DefaultValue; } }
       set {
@@ -8167,11 +8722,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy22" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy22 {
       get { return (_hasBits0 & 2097152) != 0; }
     }
     /// <summary>Clears the value of the "dummy22" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy22() {
       _hasBits0 &= ~2097152;
     }
@@ -8182,6 +8739,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy23_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy23 {
       get { if ((_hasBits0 & 4194304) != 0) { return dummy23_; } else { return Dummy23DefaultValue; } }
       set {
@@ -8191,11 +8749,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy23" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy23 {
       get { return (_hasBits0 & 4194304) != 0; }
     }
     /// <summary>Clears the value of the "dummy23" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy23() {
       _hasBits0 &= ~4194304;
     }
@@ -8206,6 +8766,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy24_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy24 {
       get { if ((_hasBits0 & 8388608) != 0) { return dummy24_; } else { return Dummy24DefaultValue; } }
       set {
@@ -8215,11 +8776,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy24" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy24 {
       get { return (_hasBits0 & 8388608) != 0; }
     }
     /// <summary>Clears the value of the "dummy24" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy24() {
       _hasBits0 &= ~8388608;
     }
@@ -8230,6 +8793,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy25_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy25 {
       get { if ((_hasBits0 & 16777216) != 0) { return dummy25_; } else { return Dummy25DefaultValue; } }
       set {
@@ -8239,11 +8803,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy25" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy25 {
       get { return (_hasBits0 & 16777216) != 0; }
     }
     /// <summary>Clears the value of the "dummy25" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy25() {
       _hasBits0 &= ~16777216;
     }
@@ -8254,6 +8820,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy26_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy26 {
       get { if ((_hasBits0 & 33554432) != 0) { return dummy26_; } else { return Dummy26DefaultValue; } }
       set {
@@ -8263,11 +8830,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy26" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy26 {
       get { return (_hasBits0 & 33554432) != 0; }
     }
     /// <summary>Clears the value of the "dummy26" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy26() {
       _hasBits0 &= ~33554432;
     }
@@ -8278,6 +8847,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy27_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy27 {
       get { if ((_hasBits0 & 67108864) != 0) { return dummy27_; } else { return Dummy27DefaultValue; } }
       set {
@@ -8287,11 +8857,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy27" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy27 {
       get { return (_hasBits0 & 67108864) != 0; }
     }
     /// <summary>Clears the value of the "dummy27" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy27() {
       _hasBits0 &= ~67108864;
     }
@@ -8302,6 +8874,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy28_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy28 {
       get { if ((_hasBits0 & 134217728) != 0) { return dummy28_; } else { return Dummy28DefaultValue; } }
       set {
@@ -8311,11 +8884,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy28" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy28 {
       get { return (_hasBits0 & 134217728) != 0; }
     }
     /// <summary>Clears the value of the "dummy28" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy28() {
       _hasBits0 &= ~134217728;
     }
@@ -8326,6 +8901,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy29_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy29 {
       get { if ((_hasBits0 & 268435456) != 0) { return dummy29_; } else { return Dummy29DefaultValue; } }
       set {
@@ -8335,11 +8911,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy29" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy29 {
       get { return (_hasBits0 & 268435456) != 0; }
     }
     /// <summary>Clears the value of the "dummy29" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy29() {
       _hasBits0 &= ~268435456;
     }
@@ -8350,6 +8928,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy30_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy30 {
       get { if ((_hasBits0 & 536870912) != 0) { return dummy30_; } else { return Dummy30DefaultValue; } }
       set {
@@ -8359,11 +8938,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy30" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy30 {
       get { return (_hasBits0 & 536870912) != 0; }
     }
     /// <summary>Clears the value of the "dummy30" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy30() {
       _hasBits0 &= ~536870912;
     }
@@ -8374,6 +8955,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy31_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy31 {
       get { if ((_hasBits0 & 1073741824) != 0) { return dummy31_; } else { return Dummy31DefaultValue; } }
       set {
@@ -8383,11 +8965,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy31" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy31 {
       get { return (_hasBits0 & 1073741824) != 0; }
     }
     /// <summary>Clears the value of the "dummy31" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy31() {
       _hasBits0 &= ~1073741824;
     }
@@ -8398,6 +8982,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy32 {
       get { if ((_hasBits0 & -2147483648) != 0) { return dummy32_; } else { return Dummy32DefaultValue; } }
       set {
@@ -8407,11 +8992,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy32 {
       get { return (_hasBits0 & -2147483648) != 0; }
     }
     /// <summary>Clears the value of the "dummy32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy32() {
       _hasBits0 &= ~-2147483648;
     }
@@ -8422,6 +9009,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int c_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int C {
       get { if ((_hasBits1 & 1) != 0) { return c_; } else { return CDefaultValue; } }
       set {
@@ -8431,21 +9019,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "c" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasC {
       get { return (_hasBits1 & 1) != 0; }
     }
     /// <summary>Clears the value of the "c" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearC() {
       _hasBits1 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestRequired);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestRequired other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -8490,6 +9082,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasA) hash ^= A.GetHashCode();
@@ -8532,11 +9125,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -8681,6 +9276,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasA) {
         output.WriteRawTag(8);
@@ -8821,6 +9417,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasA) {
@@ -8929,6 +9526,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestRequired other) {
       if (other == null) {
         return;
@@ -9036,6 +9634,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -9185,6 +9784,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -9332,6 +9932,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Extensions
     /// <summary>Container for extensions for other messages declared in the TestRequired message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Extensions {
       public static readonly pb::Extension<global::Google.Protobuf.TestProtos.Proto2.TestAllExtensions, global::Google.Protobuf.TestProtos.Proto2.TestRequired> Single =
         new pb::Extension<global::Google.Protobuf.TestProtos.Proto2.TestAllExtensions, global::Google.Protobuf.TestProtos.Proto2.TestRequired>(1000, pb::FieldCodec.ForMessage(8002, global::Google.Protobuf.TestProtos.Proto2.TestRequired.Parser));
@@ -9351,19 +9952,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestRequiredForeign> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[13]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredForeign() {
       OnConstruction();
     }
@@ -9371,6 +9976,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredForeign(TestRequiredForeign other) : this() {
       _hasBits0 = other._hasBits0;
       optionalMessage_ = other.optionalMessage_ != null ? other.optionalMessage_.Clone() : null;
@@ -9380,6 +9986,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredForeign Clone() {
       return new TestRequiredForeign(this);
     }
@@ -9388,6 +9995,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalMessageFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestRequired optionalMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestRequired OptionalMessage {
       get { return optionalMessage_; }
       set {
@@ -9401,6 +10009,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForMessage(18, global::Google.Protobuf.TestProtos.Proto2.TestRequired.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestRequired> repeatedMessage_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestRequired>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestRequired> RepeatedMessage {
       get { return repeatedMessage_; }
     }
@@ -9411,6 +10020,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int dummy_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Dummy {
       get { if ((_hasBits0 & 1) != 0) { return dummy_; } else { return DummyDefaultValue; } }
       set {
@@ -9420,21 +10030,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dummy" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDummy {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "dummy" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDummy() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestRequiredForeign);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestRequiredForeign other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -9449,6 +10063,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (optionalMessage_ != null) hash ^= OptionalMessage.GetHashCode();
@@ -9461,11 +10076,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -9487,6 +10104,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (optionalMessage_ != null) {
         output.WriteRawTag(10);
@@ -9504,6 +10122,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (optionalMessage_ != null) {
@@ -9520,6 +10139,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestRequiredForeign other) {
       if (other == null) {
         return;
@@ -9538,6 +10158,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -9570,6 +10191,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -9607,19 +10229,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestRequiredMessage> _parser = new pb::MessageParser<TestRequiredMessage>(() => new TestRequiredMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestRequiredMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[14]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredMessage() {
       OnConstruction();
     }
@@ -9627,6 +10253,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredMessage(TestRequiredMessage other) : this() {
       optionalMessage_ = other.optionalMessage_ != null ? other.optionalMessage_.Clone() : null;
       repeatedMessage_ = other.repeatedMessage_.Clone();
@@ -9635,6 +10262,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredMessage Clone() {
       return new TestRequiredMessage(this);
     }
@@ -9643,6 +10271,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalMessageFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestRequired optionalMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestRequired OptionalMessage {
       get { return optionalMessage_; }
       set {
@@ -9656,6 +10285,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForMessage(18, global::Google.Protobuf.TestProtos.Proto2.TestRequired.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestRequired> repeatedMessage_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestRequired>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestRequired> RepeatedMessage {
       get { return repeatedMessage_; }
     }
@@ -9664,6 +10294,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int RequiredMessageFieldNumber = 3;
     private global::Google.Protobuf.TestProtos.Proto2.TestRequired requiredMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestRequired RequiredMessage {
       get { return requiredMessage_; }
       set {
@@ -9672,11 +10303,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestRequiredMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestRequiredMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -9691,6 +10324,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (optionalMessage_ != null) hash ^= OptionalMessage.GetHashCode();
@@ -9703,11 +10337,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -9729,6 +10365,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (optionalMessage_ != null) {
         output.WriteRawTag(10);
@@ -9746,6 +10383,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (optionalMessage_ != null) {
@@ -9762,6 +10400,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestRequiredMessage other) {
       if (other == null) {
         return;
@@ -9783,6 +10422,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -9818,6 +10458,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -9861,19 +10502,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestForeignNested> _parser = new pb::MessageParser<TestForeignNested>(() => new TestForeignNested());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestForeignNested> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[15]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestForeignNested() {
       OnConstruction();
     }
@@ -9881,12 +10526,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestForeignNested(TestForeignNested other) : this() {
       foreignNested_ = other.foreignNested_ != null ? other.foreignNested_.Clone() : null;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestForeignNested Clone() {
       return new TestForeignNested(this);
     }
@@ -9895,6 +10542,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int ForeignNestedFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage foreignNested_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Types.NestedMessage ForeignNested {
       get { return foreignNested_; }
       set {
@@ -9903,11 +10551,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestForeignNested);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestForeignNested other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -9920,6 +10570,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (foreignNested_ != null) hash ^= ForeignNested.GetHashCode();
@@ -9930,11 +10581,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -9951,6 +10604,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (foreignNested_ != null) {
         output.WriteRawTag(10);
@@ -9963,6 +10617,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (foreignNested_ != null) {
@@ -9975,6 +10630,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestForeignNested other) {
       if (other == null) {
         return;
@@ -9989,6 +10645,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -10013,6 +10670,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -10045,19 +10703,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestEmptyMessage> _parser = new pb::MessageParser<TestEmptyMessage>(() => new TestEmptyMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestEmptyMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[16]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEmptyMessage() {
       OnConstruction();
     }
@@ -10065,21 +10727,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEmptyMessage(TestEmptyMessage other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEmptyMessage Clone() {
       return new TestEmptyMessage(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestEmptyMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestEmptyMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -10091,6 +10757,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -10100,11 +10767,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -10117,6 +10786,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -10125,6 +10795,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -10134,6 +10805,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestEmptyMessage other) {
       if (other == null) {
         return;
@@ -10142,6 +10814,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -10159,6 +10832,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -10187,19 +10861,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::ExtensionSet<TestEmptyMessageWithExtensions> _extensions;
     private pb::ExtensionSet<TestEmptyMessageWithExtensions> _Extensions { get { return _extensions; } }
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestEmptyMessageWithExtensions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[17]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEmptyMessageWithExtensions() {
       OnConstruction();
     }
@@ -10207,22 +10885,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEmptyMessageWithExtensions(TestEmptyMessageWithExtensions other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
       _extensions = pb::ExtensionSet.Clone(other._extensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEmptyMessageWithExtensions Clone() {
       return new TestEmptyMessageWithExtensions(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestEmptyMessageWithExtensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestEmptyMessageWithExtensions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -10237,6 +10919,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_extensions != null) {
@@ -10249,11 +10932,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -10269,6 +10954,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_extensions != null) {
         _extensions.WriteTo(ref output);
@@ -10280,6 +10966,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_extensions != null) {
@@ -10292,6 +10979,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestEmptyMessageWithExtensions other) {
       if (other == null) {
         return;
@@ -10301,6 +10989,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -10320,6 +11009,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -10368,19 +11058,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::ExtensionSet<TestMultipleExtensionRanges> _extensions;
     private pb::ExtensionSet<TestMultipleExtensionRanges> _Extensions { get { return _extensions; } }
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestMultipleExtensionRanges> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[18]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMultipleExtensionRanges() {
       OnConstruction();
     }
@@ -10388,22 +11082,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMultipleExtensionRanges(TestMultipleExtensionRanges other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
       _extensions = pb::ExtensionSet.Clone(other._extensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMultipleExtensionRanges Clone() {
       return new TestMultipleExtensionRanges(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestMultipleExtensionRanges);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestMultipleExtensionRanges other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -10418,6 +11116,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_extensions != null) {
@@ -10430,11 +11129,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -10450,6 +11151,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_extensions != null) {
         _extensions.WriteTo(ref output);
@@ -10461,6 +11163,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_extensions != null) {
@@ -10473,6 +11176,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestMultipleExtensionRanges other) {
       if (other == null) {
         return;
@@ -10482,6 +11186,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -10501,6 +11206,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -10551,19 +11257,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestReallyLargeTagNumber> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[19]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReallyLargeTagNumber() {
       OnConstruction();
     }
@@ -10571,6 +11281,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReallyLargeTagNumber(TestReallyLargeTagNumber other) : this() {
       _hasBits0 = other._hasBits0;
       a_ = other.a_;
@@ -10579,6 +11290,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReallyLargeTagNumber Clone() {
       return new TestReallyLargeTagNumber(this);
     }
@@ -10593,6 +11305,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// three bits to communicate wire type.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int A {
       get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
       set {
@@ -10602,11 +11315,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "a" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasA {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "a" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearA() {
       _hasBits0 &= ~1;
     }
@@ -10617,6 +11332,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int bb_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Bb {
       get { if ((_hasBits0 & 2) != 0) { return bb_; } else { return BbDefaultValue; } }
       set {
@@ -10626,21 +11342,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "bb" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBb {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "bb" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBb() {
       _hasBits0 &= ~2;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestReallyLargeTagNumber);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestReallyLargeTagNumber other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -10654,6 +11374,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasA) hash ^= A.GetHashCode();
@@ -10665,11 +11386,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -10690,6 +11413,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasA) {
         output.WriteRawTag(8);
@@ -10706,6 +11430,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasA) {
@@ -10721,6 +11446,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestReallyLargeTagNumber other) {
       if (other == null) {
         return;
@@ -10735,6 +11461,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -10760,6 +11487,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -10791,19 +11519,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestRecursiveMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[20]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRecursiveMessage() {
       OnConstruction();
     }
@@ -10811,6 +11543,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRecursiveMessage(TestRecursiveMessage other) : this() {
       _hasBits0 = other._hasBits0;
       a_ = other.a_ != null ? other.a_.Clone() : null;
@@ -10819,6 +11552,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRecursiveMessage Clone() {
       return new TestRecursiveMessage(this);
     }
@@ -10827,6 +11561,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int AFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestRecursiveMessage a_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestRecursiveMessage A {
       get { return a_; }
       set {
@@ -10840,6 +11575,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int i_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int I {
       get { if ((_hasBits0 & 1) != 0) { return i_; } else { return IDefaultValue; } }
       set {
@@ -10849,21 +11585,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "i" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasI {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "i" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearI() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestRecursiveMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestRecursiveMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -10877,6 +11617,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (a_ != null) hash ^= A.GetHashCode();
@@ -10888,11 +11629,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -10913,6 +11656,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (a_ != null) {
         output.WriteRawTag(10);
@@ -10929,6 +11673,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (a_ != null) {
@@ -10944,6 +11689,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestRecursiveMessage other) {
       if (other == null) {
         return;
@@ -10961,6 +11707,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -10989,6 +11736,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -11025,19 +11773,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestMutualRecursionA> _parser = new pb::MessageParser<TestMutualRecursionA>(() => new TestMutualRecursionA());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestMutualRecursionA> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[21]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionA() {
       OnConstruction();
     }
@@ -11045,6 +11797,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionA(TestMutualRecursionA other) : this() {
       bb_ = other.bb_ != null ? other.bb_.Clone() : null;
       subGroup_ = other.HasSubGroup ? other.subGroup_.Clone() : null;
@@ -11052,6 +11805,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionA Clone() {
       return new TestMutualRecursionA(this);
     }
@@ -11060,6 +11814,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int BbFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionB bb_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionB Bb {
       get { return bb_; }
       set {
@@ -11071,6 +11826,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int SubGroupFieldNumber = 2;
     private global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionA.Types.SubGroup subGroup_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionA.Types.SubGroup SubGroup {
       get { return subGroup_; }
       set {
@@ -11079,21 +11835,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the subgroup field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasSubGroup {
       get { return subGroup_ != null; }
     }
     /// <summary>Clears the value of the subgroup field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearSubGroup() {
       subGroup_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestMutualRecursionA);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestMutualRecursionA other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -11107,6 +11867,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (bb_ != null) hash ^= Bb.GetHashCode();
@@ -11118,11 +11879,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -11144,6 +11907,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (bb_ != null) {
         output.WriteRawTag(10);
@@ -11161,6 +11925,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (bb_ != null) {
@@ -11176,6 +11941,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestMutualRecursionA other) {
       if (other == null) {
         return;
@@ -11196,6 +11962,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -11227,6 +11994,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -11256,6 +12024,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestMutualRecursionA message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class SubMessage : pb::IMessage<SubMessage>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -11265,19 +12034,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private static readonly pb::MessageParser<SubMessage> _parser = new pb::MessageParser<SubMessage>(() => new SubMessage());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<SubMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionA.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SubMessage() {
           OnConstruction();
         }
@@ -11285,12 +12058,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SubMessage(SubMessage other) : this() {
           b_ = other.b_ != null ? other.b_.Clone() : null;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SubMessage Clone() {
           return new SubMessage(this);
         }
@@ -11299,6 +12074,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         public const int BFieldNumber = 1;
         private global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionB b_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionB B {
           get { return b_; }
           set {
@@ -11307,11 +12083,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as SubMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(SubMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -11324,6 +12102,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (b_ != null) hash ^= B.GetHashCode();
@@ -11334,11 +12113,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -11355,6 +12136,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (b_ != null) {
             output.WriteRawTag(10);
@@ -11367,6 +12149,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (b_ != null) {
@@ -11379,6 +12162,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(SubMessage other) {
           if (other == null) {
             return;
@@ -11393,6 +12177,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -11417,6 +12202,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -11446,19 +12232,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private static readonly pb::MessageParser<SubGroup> _parser = new pb::MessageParser<SubGroup>(() => new SubGroup());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<SubGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionA.Descriptor.NestedTypes[1]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SubGroup() {
           OnConstruction();
         }
@@ -11466,6 +12256,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SubGroup(SubGroup other) : this() {
           subMessage_ = other.subMessage_ != null ? other.subMessage_.Clone() : null;
           notInThisScc_ = other.notInThisScc_ != null ? other.notInThisScc_.Clone() : null;
@@ -11473,6 +12264,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SubGroup Clone() {
           return new SubGroup(this);
         }
@@ -11484,6 +12276,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         /// Needed because of bug in javatest
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionA.Types.SubMessage SubMessage {
           get { return subMessage_; }
           set {
@@ -11495,6 +12288,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         public const int NotInThisSccFieldNumber = 4;
         private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes notInThisScc_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes NotInThisScc {
           get { return notInThisScc_; }
           set {
@@ -11503,11 +12297,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as SubGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(SubGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -11521,6 +12317,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (subMessage_ != null) hash ^= SubMessage.GetHashCode();
@@ -11532,11 +12329,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -11557,6 +12356,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (subMessage_ != null) {
             output.WriteRawTag(26);
@@ -11573,6 +12373,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (subMessage_ != null) {
@@ -11588,6 +12389,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(SubGroup other) {
           if (other == null) {
             return;
@@ -11608,6 +12410,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -11641,6 +12444,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -11685,19 +12489,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestMutualRecursionB> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[22]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionB() {
       OnConstruction();
     }
@@ -11705,6 +12513,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionB(TestMutualRecursionB other) : this() {
       _hasBits0 = other._hasBits0;
       a_ = other.a_ != null ? other.a_.Clone() : null;
@@ -11713,6 +12522,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionB Clone() {
       return new TestMutualRecursionB(this);
     }
@@ -11721,6 +12531,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int AFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionA a_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestMutualRecursionA A {
       get { return a_; }
       set {
@@ -11734,6 +12545,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int optionalInt32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalInt32 {
       get { if ((_hasBits0 & 1) != 0) { return optionalInt32_; } else { return OptionalInt32DefaultValue; } }
       set {
@@ -11743,21 +12555,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_int32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalInt32 {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "optional_int32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalInt32() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestMutualRecursionB);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestMutualRecursionB other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -11771,6 +12587,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (a_ != null) hash ^= A.GetHashCode();
@@ -11782,11 +12599,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -11807,6 +12626,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (a_ != null) {
         output.WriteRawTag(10);
@@ -11823,6 +12643,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (a_ != null) {
@@ -11838,6 +12659,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestMutualRecursionB other) {
       if (other == null) {
         return;
@@ -11855,6 +12677,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -11883,6 +12706,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -11916,19 +12740,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestIsInitialized> _parser = new pb::MessageParser<TestIsInitialized>(() => new TestIsInitialized());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestIsInitialized> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[23]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestIsInitialized() {
       OnConstruction();
     }
@@ -11936,12 +12764,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestIsInitialized(TestIsInitialized other) : this() {
       subMessage_ = other.subMessage_ != null ? other.subMessage_.Clone() : null;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestIsInitialized Clone() {
       return new TestIsInitialized(this);
     }
@@ -11950,6 +12780,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int SubMessageFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestIsInitialized.Types.SubMessage subMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestIsInitialized.Types.SubMessage SubMessage {
       get { return subMessage_; }
       set {
@@ -11958,11 +12789,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestIsInitialized);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestIsInitialized other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -11975,6 +12808,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (subMessage_ != null) hash ^= SubMessage.GetHashCode();
@@ -11985,11 +12819,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -12006,6 +12842,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (subMessage_ != null) {
         output.WriteRawTag(10);
@@ -12018,6 +12855,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (subMessage_ != null) {
@@ -12030,6 +12868,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestIsInitialized other) {
       if (other == null) {
         return;
@@ -12044,6 +12883,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -12068,6 +12908,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -12090,6 +12931,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestIsInitialized message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class SubMessage : pb::IMessage<SubMessage>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -12099,19 +12941,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private static readonly pb::MessageParser<SubMessage> _parser = new pb::MessageParser<SubMessage>(() => new SubMessage());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<SubMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestIsInitialized.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SubMessage() {
           OnConstruction();
         }
@@ -12119,12 +12965,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SubMessage(SubMessage other) : this() {
           subGroup_ = other.HasSubGroup ? other.subGroup_.Clone() : null;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SubMessage Clone() {
           return new SubMessage(this);
         }
@@ -12133,6 +12981,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         public const int SubGroupFieldNumber = 1;
         private global::Google.Protobuf.TestProtos.Proto2.TestIsInitialized.Types.SubMessage.Types.SubGroup subGroup_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public global::Google.Protobuf.TestProtos.Proto2.TestIsInitialized.Types.SubMessage.Types.SubGroup SubGroup {
           get { return subGroup_; }
           set {
@@ -12141,21 +12990,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the subgroup field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasSubGroup {
           get { return subGroup_ != null; }
         }
         /// <summary>Clears the value of the subgroup field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearSubGroup() {
           subGroup_ = null;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as SubMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(SubMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -12168,6 +13021,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasSubGroup) hash ^= SubGroup.GetHashCode();
@@ -12178,11 +13032,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -12200,6 +13056,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasSubGroup) {
             output.WriteRawTag(11);
@@ -12213,6 +13070,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasSubGroup) {
@@ -12225,6 +13083,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(SubMessage other) {
           if (other == null) {
             return;
@@ -12239,6 +13098,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -12263,6 +13123,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -12285,6 +13146,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #region Nested types
         /// <summary>Container for nested types declared in the SubMessage message type.</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static partial class Types {
           public sealed partial class SubGroup : pb::IMessage<SubGroup>
           #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -12295,19 +13157,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             private pb::UnknownFieldSet _unknownFields;
             private int _hasBits0;
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public static pb::MessageParser<SubGroup> Parser { get { return _parser; } }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public static pbr::MessageDescriptor Descriptor {
               get { return global::Google.Protobuf.TestProtos.Proto2.TestIsInitialized.Types.SubMessage.Descriptor.NestedTypes[0]; }
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             pbr::MessageDescriptor pb::IMessage.Descriptor {
               get { return Descriptor; }
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public SubGroup() {
               OnConstruction();
             }
@@ -12315,6 +13181,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             partial void OnConstruction();
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public SubGroup(SubGroup other) : this() {
               _hasBits0 = other._hasBits0;
               i_ = other.i_;
@@ -12322,6 +13189,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public SubGroup Clone() {
               return new SubGroup(this);
             }
@@ -12332,6 +13200,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
             private int i_;
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public int I {
               get { if ((_hasBits0 & 1) != 0) { return i_; } else { return IDefaultValue; } }
               set {
@@ -12341,21 +13210,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
             /// <summary>Gets whether the "i" field is set</summary>
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public bool HasI {
               get { return (_hasBits0 & 1) != 0; }
             }
             /// <summary>Clears the value of the "i" field</summary>
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void ClearI() {
               _hasBits0 &= ~1;
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override bool Equals(object other) {
               return Equals(other as SubGroup);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public bool Equals(SubGroup other) {
               if (ReferenceEquals(other, null)) {
                 return false;
@@ -12368,6 +13241,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override int GetHashCode() {
               int hash = 1;
               if (HasI) hash ^= I.GetHashCode();
@@ -12378,11 +13252,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override string ToString() {
               return pb::JsonFormatter.ToDiagnosticString(this);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void WriteTo(pb::CodedOutputStream output) {
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
               output.WriteRawMessage(this);
@@ -12399,6 +13275,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
               if (HasI) {
                 output.WriteRawTag(16);
@@ -12411,6 +13288,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             #endif
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public int CalculateSize() {
               int size = 0;
               if (HasI) {
@@ -12423,6 +13301,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void MergeFrom(SubGroup other) {
               if (other == null) {
                 return;
@@ -12434,6 +13313,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void MergeFrom(pb::CodedInputStream input) {
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
               input.ReadRawMessage(this);
@@ -12457,6 +13337,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
               uint tag;
               while ((tag = input.ReadTag()) != 0) {
@@ -12502,19 +13383,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestDupFieldNumber> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[24]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDupFieldNumber() {
       OnConstruction();
     }
@@ -12522,6 +13407,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDupFieldNumber(TestDupFieldNumber other) : this() {
       _hasBits0 = other._hasBits0;
       a_ = other.a_;
@@ -12531,6 +13417,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDupFieldNumber Clone() {
       return new TestDupFieldNumber(this);
     }
@@ -12544,6 +13431,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// NO_PROTO1
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int A {
       get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
       set {
@@ -12553,11 +13441,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "a" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasA {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "a" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearA() {
       _hasBits0 &= ~1;
     }
@@ -12566,6 +13456,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int FooFieldNumber = 2;
     private global::Google.Protobuf.TestProtos.Proto2.TestDupFieldNumber.Types.Foo foo_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestDupFieldNumber.Types.Foo Foo {
       get { return foo_; }
       set {
@@ -12574,11 +13465,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the foo field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFoo {
       get { return foo_ != null; }
     }
     /// <summary>Clears the value of the foo field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFoo() {
       foo_ = null;
     }
@@ -12587,6 +13480,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int BarFieldNumber = 3;
     private global::Google.Protobuf.TestProtos.Proto2.TestDupFieldNumber.Types.Bar bar_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestDupFieldNumber.Types.Bar Bar {
       get { return bar_; }
       set {
@@ -12595,21 +13489,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the bar field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBar {
       get { return bar_ != null; }
     }
     /// <summary>Clears the value of the bar field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBar() {
       bar_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestDupFieldNumber);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestDupFieldNumber other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -12624,6 +13522,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasA) hash ^= A.GetHashCode();
@@ -12636,11 +13535,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -12667,6 +13568,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasA) {
         output.WriteRawTag(8);
@@ -12689,6 +13591,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasA) {
@@ -12707,6 +13610,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestDupFieldNumber other) {
       if (other == null) {
         return;
@@ -12730,6 +13634,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -12765,6 +13670,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -12798,6 +13704,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestDupFieldNumber message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class Foo : pb::IMessage<Foo>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -12808,19 +13715,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<Foo> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestDupFieldNumber.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Foo() {
           OnConstruction();
         }
@@ -12828,6 +13739,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Foo(Foo other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -12835,6 +13747,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Foo Clone() {
           return new Foo(this);
         }
@@ -12845,6 +13758,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -12854,21 +13768,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as Foo);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(Foo other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -12881,6 +13799,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -12891,11 +13810,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -12912,6 +13833,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(8);
@@ -12924,6 +13846,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -12936,6 +13859,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(Foo other) {
           if (other == null) {
             return;
@@ -12947,6 +13871,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -12970,6 +13895,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -12999,19 +13925,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<Bar> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestDupFieldNumber.Descriptor.NestedTypes[1]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Bar() {
           OnConstruction();
         }
@@ -13019,6 +13949,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Bar(Bar other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -13026,6 +13957,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Bar Clone() {
           return new Bar(this);
         }
@@ -13036,6 +13968,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -13045,21 +13978,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as Bar);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(Bar other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -13072,6 +14009,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -13082,11 +14020,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -13103,6 +14043,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(8);
@@ -13115,6 +14056,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -13127,6 +14069,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(Bar other) {
           if (other == null) {
             return;
@@ -13138,6 +14081,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -13161,6 +14105,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -13197,19 +14142,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestEagerMessage> _parser = new pb::MessageParser<TestEagerMessage>(() => new TestEagerMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestEagerMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[25]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEagerMessage() {
       OnConstruction();
     }
@@ -13217,12 +14166,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEagerMessage(TestEagerMessage other) : this() {
       subMessage_ = other.subMessage_ != null ? other.subMessage_.Clone() : null;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEagerMessage Clone() {
       return new TestEagerMessage(this);
     }
@@ -13231,6 +14182,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int SubMessageFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes subMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes SubMessage {
       get { return subMessage_; }
       set {
@@ -13239,11 +14191,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestEagerMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestEagerMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -13256,6 +14210,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (subMessage_ != null) hash ^= SubMessage.GetHashCode();
@@ -13266,11 +14221,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -13287,6 +14244,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (subMessage_ != null) {
         output.WriteRawTag(10);
@@ -13299,6 +14257,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (subMessage_ != null) {
@@ -13311,6 +14270,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestEagerMessage other) {
       if (other == null) {
         return;
@@ -13325,6 +14285,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -13349,6 +14310,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -13378,19 +14340,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestLazyMessage> _parser = new pb::MessageParser<TestLazyMessage>(() => new TestLazyMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestLazyMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[26]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestLazyMessage() {
       OnConstruction();
     }
@@ -13398,12 +14364,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestLazyMessage(TestLazyMessage other) : this() {
       subMessage_ = other.subMessage_ != null ? other.subMessage_.Clone() : null;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestLazyMessage Clone() {
       return new TestLazyMessage(this);
     }
@@ -13412,6 +14380,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int SubMessageFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes subMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes SubMessage {
       get { return subMessage_; }
       set {
@@ -13420,11 +14389,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestLazyMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestLazyMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -13437,6 +14408,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (subMessage_ != null) hash ^= SubMessage.GetHashCode();
@@ -13447,11 +14419,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -13468,6 +14442,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (subMessage_ != null) {
         output.WriteRawTag(10);
@@ -13480,6 +14455,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (subMessage_ != null) {
@@ -13492,6 +14468,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestLazyMessage other) {
       if (other == null) {
         return;
@@ -13506,6 +14483,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -13530,6 +14508,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -13562,19 +14541,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestNestedMessageHasBits> _parser = new pb::MessageParser<TestNestedMessageHasBits>(() => new TestNestedMessageHasBits());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestNestedMessageHasBits> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[27]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestNestedMessageHasBits() {
       OnConstruction();
     }
@@ -13582,12 +14565,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestNestedMessageHasBits(TestNestedMessageHasBits other) : this() {
       optionalNestedMessage_ = other.optionalNestedMessage_ != null ? other.optionalNestedMessage_.Clone() : null;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestNestedMessageHasBits Clone() {
       return new TestNestedMessageHasBits(this);
     }
@@ -13596,6 +14581,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalNestedMessageFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestNestedMessageHasBits.Types.NestedMessage optionalNestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestNestedMessageHasBits.Types.NestedMessage OptionalNestedMessage {
       get { return optionalNestedMessage_; }
       set {
@@ -13604,11 +14590,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestNestedMessageHasBits);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestNestedMessageHasBits other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -13621,6 +14609,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (optionalNestedMessage_ != null) hash ^= OptionalNestedMessage.GetHashCode();
@@ -13631,11 +14620,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -13652,6 +14643,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (optionalNestedMessage_ != null) {
         output.WriteRawTag(10);
@@ -13664,6 +14656,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (optionalNestedMessage_ != null) {
@@ -13676,6 +14669,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestNestedMessageHasBits other) {
       if (other == null) {
         return;
@@ -13690,6 +14684,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -13714,6 +14709,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -13736,6 +14732,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestNestedMessageHasBits message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class NestedMessage : pb::IMessage<NestedMessage>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -13745,19 +14742,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private static readonly pb::MessageParser<NestedMessage> _parser = new pb::MessageParser<NestedMessage>(() => new NestedMessage());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestNestedMessageHasBits.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -13765,6 +14766,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           nestedmessageRepeatedInt32_ = other.nestedmessageRepeatedInt32_.Clone();
           nestedmessageRepeatedForeignmessage_ = other.nestedmessageRepeatedForeignmessage_.Clone();
@@ -13772,6 +14774,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -13782,6 +14785,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             = pb::FieldCodec.ForInt32(8);
         private readonly pbc::RepeatedField<int> nestedmessageRepeatedInt32_ = new pbc::RepeatedField<int>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<int> NestedmessageRepeatedInt32 {
           get { return nestedmessageRepeatedInt32_; }
         }
@@ -13792,16 +14796,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             = pb::FieldCodec.ForMessage(18, global::Google.Protobuf.TestProtos.Proto2.ForeignMessage.Parser);
         private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignMessage> nestedmessageRepeatedForeignmessage_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignMessage>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignMessage> NestedmessageRepeatedForeignmessage {
           get { return nestedmessageRepeatedForeignmessage_; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -13815,6 +14822,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           hash ^= nestedmessageRepeatedInt32_.GetHashCode();
@@ -13826,11 +14834,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -13845,6 +14855,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           nestedmessageRepeatedInt32_.WriteTo(ref output, _repeated_nestedmessageRepeatedInt32_codec);
           nestedmessageRepeatedForeignmessage_.WriteTo(ref output, _repeated_nestedmessageRepeatedForeignmessage_codec);
@@ -13855,6 +14866,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           size += nestedmessageRepeatedInt32_.CalculateSize(_repeated_nestedmessageRepeatedInt32_codec);
@@ -13866,6 +14878,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -13876,6 +14889,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -13902,6 +14916,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -13943,19 +14958,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestCamelCaseFieldNames> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[28]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCamelCaseFieldNames() {
       OnConstruction();
     }
@@ -13963,6 +14982,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCamelCaseFieldNames(TestCamelCaseFieldNames other) : this() {
       _hasBits0 = other._hasBits0;
       primitiveField_ = other.primitiveField_;
@@ -13981,6 +15001,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCamelCaseFieldNames Clone() {
       return new TestCamelCaseFieldNames(this);
     }
@@ -13991,6 +15012,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int primitiveField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int PrimitiveField {
       get { if ((_hasBits0 & 1) != 0) { return primitiveField_; } else { return PrimitiveFieldDefaultValue; } }
       set {
@@ -14000,11 +15022,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "PrimitiveField" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasPrimitiveField {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "PrimitiveField" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearPrimitiveField() {
       _hasBits0 &= ~1;
     }
@@ -14015,6 +15039,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string stringField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringField {
       get { return stringField_ ?? StringFieldDefaultValue; }
       set {
@@ -14023,11 +15048,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "StringField" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasStringField {
       get { return stringField_ != null; }
     }
     /// <summary>Clears the value of the "StringField" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearStringField() {
       stringField_ = null;
     }
@@ -14038,6 +15065,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.ForeignEnum enumField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ForeignEnum EnumField {
       get { if ((_hasBits0 & 2) != 0) { return enumField_; } else { return EnumFieldDefaultValue; } }
       set {
@@ -14047,11 +15075,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "EnumField" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasEnumField {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "EnumField" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearEnumField() {
       _hasBits0 &= ~2;
     }
@@ -14060,6 +15090,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int MessageFieldFieldNumber = 4;
     private global::Google.Protobuf.TestProtos.Proto2.ForeignMessage messageField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ForeignMessage MessageField {
       get { return messageField_; }
       set {
@@ -14073,6 +15104,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string stringPieceField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringPieceField {
       get { return stringPieceField_ ?? StringPieceFieldDefaultValue; }
       set {
@@ -14081,11 +15113,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "StringPieceField" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasStringPieceField {
       get { return stringPieceField_ != null; }
     }
     /// <summary>Clears the value of the "StringPieceField" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearStringPieceField() {
       stringPieceField_ = null;
     }
@@ -14096,6 +15130,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string cordField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string CordField {
       get { return cordField_ ?? CordFieldDefaultValue; }
       set {
@@ -14104,11 +15139,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "CordField" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasCordField {
       get { return cordField_ != null; }
     }
     /// <summary>Clears the value of the "CordField" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearCordField() {
       cordField_ = null;
     }
@@ -14119,6 +15156,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForInt32(56);
     private readonly pbc::RepeatedField<int> repeatedPrimitiveField_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedPrimitiveField {
       get { return repeatedPrimitiveField_; }
     }
@@ -14129,6 +15167,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForString(66);
     private readonly pbc::RepeatedField<string> repeatedStringField_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedStringField {
       get { return repeatedStringField_; }
     }
@@ -14139,6 +15178,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForEnum(72, x => (int) x, x => (global::Google.Protobuf.TestProtos.Proto2.ForeignEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum> repeatedEnumField_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum> RepeatedEnumField {
       get { return repeatedEnumField_; }
     }
@@ -14149,6 +15189,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForMessage(82, global::Google.Protobuf.TestProtos.Proto2.ForeignMessage.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignMessage> repeatedMessageField_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignMessage> RepeatedMessageField {
       get { return repeatedMessageField_; }
     }
@@ -14159,6 +15200,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForString(90);
     private readonly pbc::RepeatedField<string> repeatedStringPieceField_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedStringPieceField {
       get { return repeatedStringPieceField_; }
     }
@@ -14169,16 +15211,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForString(98);
     private readonly pbc::RepeatedField<string> repeatedCordField_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedCordField {
       get { return repeatedCordField_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestCamelCaseFieldNames);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestCamelCaseFieldNames other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -14202,6 +15247,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasPrimitiveField) hash ^= PrimitiveField.GetHashCode();
@@ -14223,11 +15269,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -14270,6 +15318,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasPrimitiveField) {
         output.WriteRawTag(8);
@@ -14308,6 +15357,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasPrimitiveField) {
@@ -14341,6 +15391,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestCamelCaseFieldNames other) {
       if (other == null) {
         return;
@@ -14376,6 +15427,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -14446,6 +15498,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -14528,19 +15581,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::ExtensionSet<TestFieldOrderings> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestFieldOrderings> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[29]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestFieldOrderings() {
       OnConstruction();
     }
@@ -14548,6 +15605,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestFieldOrderings(TestFieldOrderings other) : this() {
       _hasBits0 = other._hasBits0;
       myString_ = other.myString_;
@@ -14559,6 +15617,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestFieldOrderings Clone() {
       return new TestFieldOrderings(this);
     }
@@ -14569,6 +15628,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string myString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string MyString {
       get { return myString_ ?? MyStringDefaultValue; }
       set {
@@ -14577,11 +15637,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "my_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasMyString {
       get { return myString_ != null; }
     }
     /// <summary>Clears the value of the "my_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearMyString() {
       myString_ = null;
     }
@@ -14592,6 +15654,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private long myInt_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long MyInt {
       get { if ((_hasBits0 & 1) != 0) { return myInt_; } else { return MyIntDefaultValue; } }
       set {
@@ -14601,11 +15664,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "my_int" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasMyInt {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "my_int" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearMyInt() {
       _hasBits0 &= ~1;
     }
@@ -14616,6 +15681,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float myFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float MyFloat {
       get { if ((_hasBits0 & 2) != 0) { return myFloat_; } else { return MyFloatDefaultValue; } }
       set {
@@ -14625,11 +15691,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "my_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasMyFloat {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "my_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearMyFloat() {
       _hasBits0 &= ~2;
     }
@@ -14638,6 +15706,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalNestedMessageFieldNumber = 200;
     private global::Google.Protobuf.TestProtos.Proto2.TestFieldOrderings.Types.NestedMessage optionalNestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestFieldOrderings.Types.NestedMessage OptionalNestedMessage {
       get { return optionalNestedMessage_; }
       set {
@@ -14646,11 +15715,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestFieldOrderings);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestFieldOrderings other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -14669,6 +15740,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasMyString) hash ^= MyString.GetHashCode();
@@ -14685,11 +15757,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -14721,6 +15795,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasMyInt) {
         output.WriteRawTag(8);
@@ -14748,6 +15823,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasMyString) {
@@ -14772,6 +15848,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestFieldOrderings other) {
       if (other == null) {
         return;
@@ -14796,6 +15873,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -14834,6 +15912,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -14892,6 +15971,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestFieldOrderings message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class NestedMessage : pb::IMessage<NestedMessage>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -14902,19 +15982,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestFieldOrderings.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -14922,6 +16006,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           _hasBits0 = other._hasBits0;
           oo_ = other.oo_;
@@ -14930,6 +16015,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -14940,6 +16026,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private long oo_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public long Oo {
           get { if ((_hasBits0 & 2) != 0) { return oo_; } else { return OoDefaultValue; } }
           set {
@@ -14949,11 +16036,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "oo" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasOo {
           get { return (_hasBits0 & 2) != 0; }
         }
         /// <summary>Clears the value of the "oo" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearOo() {
           _hasBits0 &= ~2;
         }
@@ -14969,6 +16058,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         /// This file needs to compile in proto1 to test backwards-compatibility.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Bb {
           get { if ((_hasBits0 & 1) != 0) { return bb_; } else { return BbDefaultValue; } }
           set {
@@ -14978,21 +16068,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "bb" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasBb {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "bb" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearBb() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -15006,6 +16100,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasOo) hash ^= Oo.GetHashCode();
@@ -15017,11 +16112,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -15042,6 +16139,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasBb) {
             output.WriteRawTag(8);
@@ -15058,6 +16156,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasOo) {
@@ -15073,6 +16172,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -15087,6 +16187,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -15112,6 +16213,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -15147,19 +16249,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestExtensionOrderings1> _parser = new pb::MessageParser<TestExtensionOrderings1>(() => new TestExtensionOrderings1());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestExtensionOrderings1> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[30]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtensionOrderings1() {
       OnConstruction();
     }
@@ -15167,12 +16273,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtensionOrderings1(TestExtensionOrderings1 other) : this() {
       myString_ = other.myString_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtensionOrderings1 Clone() {
       return new TestExtensionOrderings1(this);
     }
@@ -15183,6 +16291,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string myString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string MyString {
       get { return myString_ ?? MyStringDefaultValue; }
       set {
@@ -15191,21 +16300,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "my_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasMyString {
       get { return myString_ != null; }
     }
     /// <summary>Clears the value of the "my_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearMyString() {
       myString_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestExtensionOrderings1);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestExtensionOrderings1 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -15218,6 +16331,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasMyString) hash ^= MyString.GetHashCode();
@@ -15228,11 +16342,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -15249,6 +16365,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasMyString) {
         output.WriteRawTag(10);
@@ -15261,6 +16378,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasMyString) {
@@ -15273,6 +16391,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestExtensionOrderings1 other) {
       if (other == null) {
         return;
@@ -15284,6 +16403,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -15305,6 +16425,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -15324,6 +16445,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Extensions
     /// <summary>Container for extensions for other messages declared in the TestExtensionOrderings1 message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Extensions {
       public static readonly pb::Extension<global::Google.Protobuf.TestProtos.Proto2.TestFieldOrderings, global::Google.Protobuf.TestProtos.Proto2.TestExtensionOrderings1> TestExtOrderings1 =
         new pb::Extension<global::Google.Protobuf.TestProtos.Proto2.TestFieldOrderings, global::Google.Protobuf.TestProtos.Proto2.TestExtensionOrderings1>(13, pb::FieldCodec.ForMessage(106, global::Google.Protobuf.TestProtos.Proto2.TestExtensionOrderings1.Parser));
@@ -15340,19 +16462,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestExtensionOrderings2> _parser = new pb::MessageParser<TestExtensionOrderings2>(() => new TestExtensionOrderings2());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestExtensionOrderings2> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[31]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtensionOrderings2() {
       OnConstruction();
     }
@@ -15360,12 +16486,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtensionOrderings2(TestExtensionOrderings2 other) : this() {
       myString_ = other.myString_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtensionOrderings2 Clone() {
       return new TestExtensionOrderings2(this);
     }
@@ -15376,6 +16504,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string myString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string MyString {
       get { return myString_ ?? MyStringDefaultValue; }
       set {
@@ -15384,21 +16513,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "my_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasMyString {
       get { return myString_ != null; }
     }
     /// <summary>Clears the value of the "my_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearMyString() {
       myString_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestExtensionOrderings2);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestExtensionOrderings2 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -15411,6 +16544,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasMyString) hash ^= MyString.GetHashCode();
@@ -15421,11 +16555,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -15442,6 +16578,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasMyString) {
         output.WriteRawTag(10);
@@ -15454,6 +16591,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasMyString) {
@@ -15466,6 +16604,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestExtensionOrderings2 other) {
       if (other == null) {
         return;
@@ -15477,6 +16616,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -15498,6 +16638,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -15517,6 +16658,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestExtensionOrderings2 message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class TestExtensionOrderings3 : pb::IMessage<TestExtensionOrderings3>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -15526,19 +16668,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private static readonly pb::MessageParser<TestExtensionOrderings3> _parser = new pb::MessageParser<TestExtensionOrderings3>(() => new TestExtensionOrderings3());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<TestExtensionOrderings3> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestExtensionOrderings2.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public TestExtensionOrderings3() {
           OnConstruction();
         }
@@ -15546,12 +16692,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public TestExtensionOrderings3(TestExtensionOrderings3 other) : this() {
           myString_ = other.myString_;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public TestExtensionOrderings3 Clone() {
           return new TestExtensionOrderings3(this);
         }
@@ -15562,6 +16710,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private string myString_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string MyString {
           get { return myString_ ?? MyStringDefaultValue; }
           set {
@@ -15570,21 +16719,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "my_string" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasMyString {
           get { return myString_ != null; }
         }
         /// <summary>Clears the value of the "my_string" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearMyString() {
           myString_ = null;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as TestExtensionOrderings3);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(TestExtensionOrderings3 other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -15597,6 +16750,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasMyString) hash ^= MyString.GetHashCode();
@@ -15607,11 +16761,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -15628,6 +16784,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasMyString) {
             output.WriteRawTag(10);
@@ -15640,6 +16797,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasMyString) {
@@ -15652,6 +16810,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(TestExtensionOrderings3 other) {
           if (other == null) {
             return;
@@ -15663,6 +16822,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -15684,6 +16844,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -15703,6 +16864,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #region Extensions
         /// <summary>Container for extensions for other messages declared in the TestExtensionOrderings3 message type.</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static partial class Extensions {
           public static readonly pb::Extension<global::Google.Protobuf.TestProtos.Proto2.TestFieldOrderings, global::Google.Protobuf.TestProtos.Proto2.TestExtensionOrderings2.Types.TestExtensionOrderings3> TestExtOrderings3 =
             new pb::Extension<global::Google.Protobuf.TestProtos.Proto2.TestFieldOrderings, global::Google.Protobuf.TestProtos.Proto2.TestExtensionOrderings2.Types.TestExtensionOrderings3>(14, pb::FieldCodec.ForMessage(114, global::Google.Protobuf.TestProtos.Proto2.TestExtensionOrderings2.Types.TestExtensionOrderings3.Parser));
@@ -15717,6 +16879,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Extensions
     /// <summary>Container for extensions for other messages declared in the TestExtensionOrderings2 message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Extensions {
       public static readonly pb::Extension<global::Google.Protobuf.TestProtos.Proto2.TestFieldOrderings, global::Google.Protobuf.TestProtos.Proto2.TestExtensionOrderings2> TestExtOrderings2 =
         new pb::Extension<global::Google.Protobuf.TestProtos.Proto2.TestFieldOrderings, global::Google.Protobuf.TestProtos.Proto2.TestExtensionOrderings2>(12, pb::FieldCodec.ForMessage(98, global::Google.Protobuf.TestProtos.Proto2.TestExtensionOrderings2.Parser));
@@ -15734,19 +16897,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestExtremeDefaultValues> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[32]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtremeDefaultValues() {
       OnConstruction();
     }
@@ -15754,6 +16921,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtremeDefaultValues(TestExtremeDefaultValues other) : this() {
       _hasBits0 = other._hasBits0;
       escapedBytes_ = other.escapedBytes_;
@@ -15787,6 +16955,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtremeDefaultValues Clone() {
       return new TestExtremeDefaultValues(this);
     }
@@ -15797,6 +16966,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private pb::ByteString escapedBytes_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString EscapedBytes {
       get { return escapedBytes_ ?? EscapedBytesDefaultValue; }
       set {
@@ -15805,11 +16975,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "escaped_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasEscapedBytes {
       get { return escapedBytes_ != null; }
     }
     /// <summary>Clears the value of the "escaped_bytes" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearEscapedBytes() {
       escapedBytes_ = null;
     }
@@ -15820,6 +16992,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private uint largeUint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint LargeUint32 {
       get { if ((_hasBits0 & 1) != 0) { return largeUint32_; } else { return LargeUint32DefaultValue; } }
       set {
@@ -15829,11 +17002,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "large_uint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasLargeUint32 {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "large_uint32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearLargeUint32() {
       _hasBits0 &= ~1;
     }
@@ -15844,6 +17019,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private ulong largeUint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong LargeUint64 {
       get { if ((_hasBits0 & 2) != 0) { return largeUint64_; } else { return LargeUint64DefaultValue; } }
       set {
@@ -15853,11 +17029,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "large_uint64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasLargeUint64 {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "large_uint64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearLargeUint64() {
       _hasBits0 &= ~2;
     }
@@ -15868,6 +17046,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int smallInt32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int SmallInt32 {
       get { if ((_hasBits0 & 4) != 0) { return smallInt32_; } else { return SmallInt32DefaultValue; } }
       set {
@@ -15877,11 +17056,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "small_int32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasSmallInt32 {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "small_int32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearSmallInt32() {
       _hasBits0 &= ~4;
     }
@@ -15892,6 +17073,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private long smallInt64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long SmallInt64 {
       get { if ((_hasBits0 & 8) != 0) { return smallInt64_; } else { return SmallInt64DefaultValue; } }
       set {
@@ -15901,11 +17083,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "small_int64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasSmallInt64 {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "small_int64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearSmallInt64() {
       _hasBits0 &= ~8;
     }
@@ -15916,6 +17100,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int reallySmallInt32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int ReallySmallInt32 {
       get { if ((_hasBits0 & 131072) != 0) { return reallySmallInt32_; } else { return ReallySmallInt32DefaultValue; } }
       set {
@@ -15925,11 +17110,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "really_small_int32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasReallySmallInt32 {
       get { return (_hasBits0 & 131072) != 0; }
     }
     /// <summary>Clears the value of the "really_small_int32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearReallySmallInt32() {
       _hasBits0 &= ~131072;
     }
@@ -15940,6 +17127,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private long reallySmallInt64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long ReallySmallInt64 {
       get { if ((_hasBits0 & 262144) != 0) { return reallySmallInt64_; } else { return ReallySmallInt64DefaultValue; } }
       set {
@@ -15949,11 +17137,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "really_small_int64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasReallySmallInt64 {
       get { return (_hasBits0 & 262144) != 0; }
     }
     /// <summary>Clears the value of the "really_small_int64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearReallySmallInt64() {
       _hasBits0 &= ~262144;
     }
@@ -15969,6 +17159,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// lots of people use editors that would be confused by this.)
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Utf8String {
       get { return utf8String_ ?? Utf8StringDefaultValue; }
       set {
@@ -15977,11 +17168,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "utf8_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasUtf8String {
       get { return utf8String_ != null; }
     }
     /// <summary>Clears the value of the "utf8_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearUtf8String() {
       utf8String_ = null;
     }
@@ -15995,6 +17188,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// Tests for single-precision floating-point values.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float ZeroFloat {
       get { if ((_hasBits0 & 16) != 0) { return zeroFloat_; } else { return ZeroFloatDefaultValue; } }
       set {
@@ -16004,11 +17198,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "zero_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasZeroFloat {
       get { return (_hasBits0 & 16) != 0; }
     }
     /// <summary>Clears the value of the "zero_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearZeroFloat() {
       _hasBits0 &= ~16;
     }
@@ -16019,6 +17215,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float oneFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float OneFloat {
       get { if ((_hasBits0 & 32) != 0) { return oneFloat_; } else { return OneFloatDefaultValue; } }
       set {
@@ -16028,11 +17225,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "one_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneFloat {
       get { return (_hasBits0 & 32) != 0; }
     }
     /// <summary>Clears the value of the "one_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneFloat() {
       _hasBits0 &= ~32;
     }
@@ -16043,6 +17242,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float smallFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float SmallFloat {
       get { if ((_hasBits0 & 64) != 0) { return smallFloat_; } else { return SmallFloatDefaultValue; } }
       set {
@@ -16052,11 +17252,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "small_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasSmallFloat {
       get { return (_hasBits0 & 64) != 0; }
     }
     /// <summary>Clears the value of the "small_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearSmallFloat() {
       _hasBits0 &= ~64;
     }
@@ -16067,6 +17269,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float negativeOneFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float NegativeOneFloat {
       get { if ((_hasBits0 & 128) != 0) { return negativeOneFloat_; } else { return NegativeOneFloatDefaultValue; } }
       set {
@@ -16076,11 +17279,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "negative_one_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasNegativeOneFloat {
       get { return (_hasBits0 & 128) != 0; }
     }
     /// <summary>Clears the value of the "negative_one_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearNegativeOneFloat() {
       _hasBits0 &= ~128;
     }
@@ -16091,6 +17296,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float negativeFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float NegativeFloat {
       get { if ((_hasBits0 & 256) != 0) { return negativeFloat_; } else { return NegativeFloatDefaultValue; } }
       set {
@@ -16100,11 +17306,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "negative_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasNegativeFloat {
       get { return (_hasBits0 & 256) != 0; }
     }
     /// <summary>Clears the value of the "negative_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearNegativeFloat() {
       _hasBits0 &= ~256;
     }
@@ -16118,6 +17326,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// Using exponents
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float LargeFloat {
       get { if ((_hasBits0 & 512) != 0) { return largeFloat_; } else { return LargeFloatDefaultValue; } }
       set {
@@ -16127,11 +17336,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "large_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasLargeFloat {
       get { return (_hasBits0 & 512) != 0; }
     }
     /// <summary>Clears the value of the "large_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearLargeFloat() {
       _hasBits0 &= ~512;
     }
@@ -16142,6 +17353,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float smallNegativeFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float SmallNegativeFloat {
       get { if ((_hasBits0 & 1024) != 0) { return smallNegativeFloat_; } else { return SmallNegativeFloatDefaultValue; } }
       set {
@@ -16151,11 +17363,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "small_negative_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasSmallNegativeFloat {
       get { return (_hasBits0 & 1024) != 0; }
     }
     /// <summary>Clears the value of the "small_negative_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearSmallNegativeFloat() {
       _hasBits0 &= ~1024;
     }
@@ -16169,6 +17383,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// Text for nonfinite floating-point values.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double InfDouble {
       get { if ((_hasBits0 & 2048) != 0) { return infDouble_; } else { return InfDoubleDefaultValue; } }
       set {
@@ -16178,11 +17393,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "inf_double" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasInfDouble {
       get { return (_hasBits0 & 2048) != 0; }
     }
     /// <summary>Clears the value of the "inf_double" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearInfDouble() {
       _hasBits0 &= ~2048;
     }
@@ -16193,6 +17410,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private double negInfDouble_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double NegInfDouble {
       get { if ((_hasBits0 & 4096) != 0) { return negInfDouble_; } else { return NegInfDoubleDefaultValue; } }
       set {
@@ -16202,11 +17420,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "neg_inf_double" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasNegInfDouble {
       get { return (_hasBits0 & 4096) != 0; }
     }
     /// <summary>Clears the value of the "neg_inf_double" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearNegInfDouble() {
       _hasBits0 &= ~4096;
     }
@@ -16217,6 +17437,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private double nanDouble_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double NanDouble {
       get { if ((_hasBits0 & 8192) != 0) { return nanDouble_; } else { return NanDoubleDefaultValue; } }
       set {
@@ -16226,11 +17447,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "nan_double" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasNanDouble {
       get { return (_hasBits0 & 8192) != 0; }
     }
     /// <summary>Clears the value of the "nan_double" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearNanDouble() {
       _hasBits0 &= ~8192;
     }
@@ -16241,6 +17464,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float infFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float InfFloat {
       get { if ((_hasBits0 & 16384) != 0) { return infFloat_; } else { return InfFloatDefaultValue; } }
       set {
@@ -16250,11 +17474,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "inf_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasInfFloat {
       get { return (_hasBits0 & 16384) != 0; }
     }
     /// <summary>Clears the value of the "inf_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearInfFloat() {
       _hasBits0 &= ~16384;
     }
@@ -16265,6 +17491,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float negInfFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float NegInfFloat {
       get { if ((_hasBits0 & 32768) != 0) { return negInfFloat_; } else { return NegInfFloatDefaultValue; } }
       set {
@@ -16274,11 +17501,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "neg_inf_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasNegInfFloat {
       get { return (_hasBits0 & 32768) != 0; }
     }
     /// <summary>Clears the value of the "neg_inf_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearNegInfFloat() {
       _hasBits0 &= ~32768;
     }
@@ -16289,6 +17518,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private float nanFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float NanFloat {
       get { if ((_hasBits0 & 65536) != 0) { return nanFloat_; } else { return NanFloatDefaultValue; } }
       set {
@@ -16298,11 +17528,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "nan_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasNanFloat {
       get { return (_hasBits0 & 65536) != 0; }
     }
     /// <summary>Clears the value of the "nan_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearNanFloat() {
       _hasBits0 &= ~65536;
     }
@@ -16320,6 +17552,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// literals.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string CppTrigraph {
       get { return cppTrigraph_ ?? CppTrigraphDefaultValue; }
       set {
@@ -16328,11 +17561,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "cpp_trigraph" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasCppTrigraph {
       get { return cppTrigraph_ != null; }
     }
     /// <summary>Clears the value of the "cpp_trigraph" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearCppTrigraph() {
       cppTrigraph_ = null;
     }
@@ -16346,6 +17581,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// String defaults containing the character '\000'
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringWithZero {
       get { return stringWithZero_ ?? StringWithZeroDefaultValue; }
       set {
@@ -16354,11 +17590,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "string_with_zero" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasStringWithZero {
       get { return stringWithZero_ != null; }
     }
     /// <summary>Clears the value of the "string_with_zero" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearStringWithZero() {
       stringWithZero_ = null;
     }
@@ -16369,6 +17607,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private pb::ByteString bytesWithZero_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString BytesWithZero {
       get { return bytesWithZero_ ?? BytesWithZeroDefaultValue; }
       set {
@@ -16377,11 +17616,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "bytes_with_zero" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBytesWithZero {
       get { return bytesWithZero_ != null; }
     }
     /// <summary>Clears the value of the "bytes_with_zero" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBytesWithZero() {
       bytesWithZero_ = null;
     }
@@ -16392,6 +17633,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string stringPieceWithZero_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringPieceWithZero {
       get { return stringPieceWithZero_ ?? StringPieceWithZeroDefaultValue; }
       set {
@@ -16400,11 +17642,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "string_piece_with_zero" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasStringPieceWithZero {
       get { return stringPieceWithZero_ != null; }
     }
     /// <summary>Clears the value of the "string_piece_with_zero" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearStringPieceWithZero() {
       stringPieceWithZero_ = null;
     }
@@ -16415,6 +17659,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string cordWithZero_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string CordWithZero {
       get { return cordWithZero_ ?? CordWithZeroDefaultValue; }
       set {
@@ -16423,11 +17668,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "cord_with_zero" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasCordWithZero {
       get { return cordWithZero_ != null; }
     }
     /// <summary>Clears the value of the "cord_with_zero" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearCordWithZero() {
       cordWithZero_ = null;
     }
@@ -16438,6 +17685,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string replacementString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string ReplacementString {
       get { return replacementString_ ?? ReplacementStringDefaultValue; }
       set {
@@ -16446,21 +17694,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "replacement_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasReplacementString {
       get { return replacementString_ != null; }
     }
     /// <summary>Clears the value of the "replacement_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearReplacementString() {
       replacementString_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestExtremeDefaultValues);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestExtremeDefaultValues other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -16499,6 +17751,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasEscapedBytes) hash ^= EscapedBytes.GetHashCode();
@@ -16535,11 +17788,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -16660,6 +17915,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasEscapedBytes) {
         output.WriteRawTag(10);
@@ -16776,6 +18032,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasEscapedBytes) {
@@ -16866,6 +18123,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestExtremeDefaultValues other) {
       if (other == null) {
         return;
@@ -16955,6 +18213,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -17080,6 +18339,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -17211,19 +18471,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<SparseEnumMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[33]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SparseEnumMessage() {
       OnConstruction();
     }
@@ -17231,6 +18495,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SparseEnumMessage(SparseEnumMessage other) : this() {
       _hasBits0 = other._hasBits0;
       sparseEnum_ = other.sparseEnum_;
@@ -17238,6 +18503,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SparseEnumMessage Clone() {
       return new SparseEnumMessage(this);
     }
@@ -17248,6 +18514,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.TestSparseEnum sparseEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestSparseEnum SparseEnum {
       get { if ((_hasBits0 & 1) != 0) { return sparseEnum_; } else { return SparseEnumDefaultValue; } }
       set {
@@ -17257,21 +18524,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "sparse_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasSparseEnum {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "sparse_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearSparseEnum() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as SparseEnumMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(SparseEnumMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -17284,6 +18555,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasSparseEnum) hash ^= SparseEnum.GetHashCode();
@@ -17294,11 +18566,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -17315,6 +18589,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasSparseEnum) {
         output.WriteRawTag(8);
@@ -17327,6 +18602,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasSparseEnum) {
@@ -17339,6 +18615,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(SparseEnumMessage other) {
       if (other == null) {
         return;
@@ -17350,6 +18627,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -17371,6 +18649,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -17400,19 +18679,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<OneString> _parser = new pb::MessageParser<OneString>(() => new OneString());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<OneString> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[34]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneString() {
       OnConstruction();
     }
@@ -17420,12 +18703,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneString(OneString other) : this() {
       data_ = other.data_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneString Clone() {
       return new OneString(this);
     }
@@ -17436,6 +18721,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Data {
       get { return data_ ?? DataDefaultValue; }
       set {
@@ -17444,21 +18730,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "data" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasData {
       get { return data_ != null; }
     }
     /// <summary>Clears the value of the "data" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearData() {
       data_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as OneString);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(OneString other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -17471,6 +18761,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasData) hash ^= Data.GetHashCode();
@@ -17481,11 +18772,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -17502,6 +18795,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasData) {
         output.WriteRawTag(10);
@@ -17514,6 +18808,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasData) {
@@ -17526,6 +18821,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(OneString other) {
       if (other == null) {
         return;
@@ -17537,6 +18833,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -17558,6 +18855,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -17584,19 +18882,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<MoreString> _parser = new pb::MessageParser<MoreString>(() => new MoreString());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MoreString> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[35]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreString() {
       OnConstruction();
     }
@@ -17604,12 +18906,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreString(MoreString other) : this() {
       data_ = other.data_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreString Clone() {
       return new MoreString(this);
     }
@@ -17620,16 +18924,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForString(10);
     private readonly pbc::RepeatedField<string> data_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> Data {
       get { return data_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MoreString);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MoreString other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -17642,6 +18949,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= data_.GetHashCode();
@@ -17652,11 +18960,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -17670,6 +18980,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       data_.WriteTo(ref output, _repeated_data_codec);
       if (_unknownFields != null) {
@@ -17679,6 +18990,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += data_.CalculateSize(_repeated_data_codec);
@@ -17689,6 +19001,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MoreString other) {
       if (other == null) {
         return;
@@ -17698,6 +19011,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -17719,6 +19033,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -17745,19 +19060,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<OneBytes> _parser = new pb::MessageParser<OneBytes>(() => new OneBytes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<OneBytes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[36]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneBytes() {
       OnConstruction();
     }
@@ -17765,12 +19084,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneBytes(OneBytes other) : this() {
       data_ = other.data_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneBytes Clone() {
       return new OneBytes(this);
     }
@@ -17781,6 +19102,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private pb::ByteString data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString Data {
       get { return data_ ?? DataDefaultValue; }
       set {
@@ -17789,21 +19111,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "data" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasData {
       get { return data_ != null; }
     }
     /// <summary>Clears the value of the "data" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearData() {
       data_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as OneBytes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(OneBytes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -17816,6 +19142,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasData) hash ^= Data.GetHashCode();
@@ -17826,11 +19153,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -17847,6 +19176,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasData) {
         output.WriteRawTag(10);
@@ -17859,6 +19189,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasData) {
@@ -17871,6 +19202,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(OneBytes other) {
       if (other == null) {
         return;
@@ -17882,6 +19214,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -17903,6 +19236,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -17929,19 +19263,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<MoreBytes> _parser = new pb::MessageParser<MoreBytes>(() => new MoreBytes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MoreBytes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[37]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreBytes() {
       OnConstruction();
     }
@@ -17949,12 +19287,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreBytes(MoreBytes other) : this() {
       data_ = other.data_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreBytes Clone() {
       return new MoreBytes(this);
     }
@@ -17965,16 +19305,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForBytes(10);
     private readonly pbc::RepeatedField<pb::ByteString> data_ = new pbc::RepeatedField<pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<pb::ByteString> Data {
       get { return data_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MoreBytes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MoreBytes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -17987,6 +19330,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= data_.GetHashCode();
@@ -17997,11 +19341,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -18015,6 +19361,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       data_.WriteTo(ref output, _repeated_data_codec);
       if (_unknownFields != null) {
@@ -18024,6 +19371,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += data_.CalculateSize(_repeated_data_codec);
@@ -18034,6 +19382,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MoreBytes other) {
       if (other == null) {
         return;
@@ -18043,6 +19392,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -18064,6 +19414,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -18094,19 +19445,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Int32Message> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[38]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int32Message() {
       OnConstruction();
     }
@@ -18114,6 +19469,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int32Message(Int32Message other) : this() {
       _hasBits0 = other._hasBits0;
       data_ = other.data_;
@@ -18121,6 +19477,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int32Message Clone() {
       return new Int32Message(this);
     }
@@ -18131,6 +19488,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Data {
       get { if ((_hasBits0 & 1) != 0) { return data_; } else { return DataDefaultValue; } }
       set {
@@ -18140,21 +19498,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "data" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasData {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "data" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearData() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Int32Message);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Int32Message other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -18167,6 +19529,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasData) hash ^= Data.GetHashCode();
@@ -18177,11 +19540,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -18198,6 +19563,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasData) {
         output.WriteRawTag(8);
@@ -18210,6 +19576,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasData) {
@@ -18222,6 +19589,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Int32Message other) {
       if (other == null) {
         return;
@@ -18233,6 +19601,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -18254,6 +19623,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -18281,19 +19651,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Uint32Message> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[39]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint32Message() {
       OnConstruction();
     }
@@ -18301,6 +19675,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint32Message(Uint32Message other) : this() {
       _hasBits0 = other._hasBits0;
       data_ = other.data_;
@@ -18308,6 +19683,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint32Message Clone() {
       return new Uint32Message(this);
     }
@@ -18318,6 +19694,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private uint data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint Data {
       get { if ((_hasBits0 & 1) != 0) { return data_; } else { return DataDefaultValue; } }
       set {
@@ -18327,21 +19704,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "data" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasData {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "data" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearData() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Uint32Message);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Uint32Message other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -18354,6 +19735,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasData) hash ^= Data.GetHashCode();
@@ -18364,11 +19746,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -18385,6 +19769,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasData) {
         output.WriteRawTag(8);
@@ -18397,6 +19782,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasData) {
@@ -18409,6 +19795,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Uint32Message other) {
       if (other == null) {
         return;
@@ -18420,6 +19807,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -18441,6 +19829,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -18468,19 +19857,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Int64Message> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[40]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int64Message() {
       OnConstruction();
     }
@@ -18488,6 +19881,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int64Message(Int64Message other) : this() {
       _hasBits0 = other._hasBits0;
       data_ = other.data_;
@@ -18495,6 +19889,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int64Message Clone() {
       return new Int64Message(this);
     }
@@ -18505,6 +19900,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private long data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Data {
       get { if ((_hasBits0 & 1) != 0) { return data_; } else { return DataDefaultValue; } }
       set {
@@ -18514,21 +19910,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "data" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasData {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "data" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearData() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Int64Message);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Int64Message other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -18541,6 +19941,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasData) hash ^= Data.GetHashCode();
@@ -18551,11 +19952,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -18572,6 +19975,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasData) {
         output.WriteRawTag(8);
@@ -18584,6 +19988,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasData) {
@@ -18596,6 +20001,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Int64Message other) {
       if (other == null) {
         return;
@@ -18607,6 +20013,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -18628,6 +20035,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -18655,19 +20063,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Uint64Message> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[41]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint64Message() {
       OnConstruction();
     }
@@ -18675,6 +20087,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint64Message(Uint64Message other) : this() {
       _hasBits0 = other._hasBits0;
       data_ = other.data_;
@@ -18682,6 +20095,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint64Message Clone() {
       return new Uint64Message(this);
     }
@@ -18692,6 +20106,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private ulong data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong Data {
       get { if ((_hasBits0 & 1) != 0) { return data_; } else { return DataDefaultValue; } }
       set {
@@ -18701,21 +20116,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "data" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasData {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "data" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearData() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Uint64Message);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Uint64Message other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -18728,6 +20147,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasData) hash ^= Data.GetHashCode();
@@ -18738,11 +20158,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -18759,6 +20181,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasData) {
         output.WriteRawTag(8);
@@ -18771,6 +20194,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasData) {
@@ -18783,6 +20207,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Uint64Message other) {
       if (other == null) {
         return;
@@ -18794,6 +20219,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -18815,6 +20241,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -18842,19 +20269,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<BoolMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[42]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BoolMessage() {
       OnConstruction();
     }
@@ -18862,6 +20293,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BoolMessage(BoolMessage other) : this() {
       _hasBits0 = other._hasBits0;
       data_ = other.data_;
@@ -18869,6 +20301,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BoolMessage Clone() {
       return new BoolMessage(this);
     }
@@ -18879,6 +20312,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private bool data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Data {
       get { if ((_hasBits0 & 1) != 0) { return data_; } else { return DataDefaultValue; } }
       set {
@@ -18888,21 +20322,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "data" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasData {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "data" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearData() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as BoolMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(BoolMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -18915,6 +20353,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasData) hash ^= Data.GetHashCode();
@@ -18925,11 +20364,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -18946,6 +20387,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasData) {
         output.WriteRawTag(8);
@@ -18958,6 +20400,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasData) {
@@ -18970,6 +20413,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(BoolMessage other) {
       if (other == null) {
         return;
@@ -18981,6 +20425,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -19002,6 +20447,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -19031,19 +20477,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestOneof> _parser = new pb::MessageParser<TestOneof>(() => new TestOneof());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestOneof> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[43]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneof() {
       OnConstruction();
     }
@@ -19051,6 +20501,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneof(TestOneof other) : this() {
       switch (other.FooCase) {
         case FooOneofCase.FooInt:
@@ -19071,6 +20522,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneof Clone() {
       return new TestOneof(this);
     }
@@ -19078,6 +20530,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_int" field.</summary>
     public const int FooIntFieldNumber = 1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FooInt {
       get { return HasFooInt ? (int) foo_ : 0; }
       set {
@@ -19087,11 +20540,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_int" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooInt {
       get { return fooCase_ == FooOneofCase.FooInt; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foo_int" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooInt() {
       if (HasFooInt) {
         ClearFoo();
@@ -19101,6 +20556,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_string" field.</summary>
     public const int FooStringFieldNumber = 2;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string FooString {
       get { return HasFooString ? (string) foo_ : ""; }
       set {
@@ -19110,11 +20566,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooString {
       get { return fooCase_ == FooOneofCase.FooString; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foo_string" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooString() {
       if (HasFooString) {
         ClearFoo();
@@ -19124,6 +20582,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_message" field.</summary>
     public const int FooMessageFieldNumber = 3;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes FooMessage {
       get { return fooCase_ == FooOneofCase.FooMessage ? (global::Google.Protobuf.TestProtos.Proto2.TestAllTypes) foo_ : null; }
       set {
@@ -19135,6 +20594,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foogroup" field.</summary>
     public const int FooGroupFieldNumber = 4;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestOneof.Types.FooGroup FooGroup {
       get { return HasFooGroup ? (global::Google.Protobuf.TestProtos.Proto2.TestOneof.Types.FooGroup) foo_ : null; }
       set {
@@ -19144,11 +20604,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foogroup" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooGroup {
       get { return fooCase_ == FooOneofCase.FooGroup; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foogroup" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooGroup() {
       if (HasFooGroup) {
         ClearFoo();
@@ -19166,22 +20628,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     private FooOneofCase fooCase_ = FooOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooOneofCase FooCase {
       get { return fooCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFoo() {
       fooCase_ = FooOneofCase.None;
       foo_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestOneof);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestOneof other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -19198,6 +20664,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasFooInt) hash ^= FooInt.GetHashCode();
@@ -19212,11 +20679,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -19246,6 +20715,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasFooInt) {
         output.WriteRawTag(8);
@@ -19271,6 +20741,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasFooInt) {
@@ -19292,6 +20763,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestOneof other) {
       if (other == null) {
         return;
@@ -19321,6 +20793,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -19364,6 +20837,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -19405,6 +20879,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestOneof message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class FooGroup : pb::IMessage<FooGroup>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -19415,19 +20890,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<FooGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestOneof.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public FooGroup() {
           OnConstruction();
         }
@@ -19435,6 +20914,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public FooGroup(FooGroup other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -19443,6 +20923,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public FooGroup Clone() {
           return new FooGroup(this);
         }
@@ -19453,6 +20934,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -19462,11 +20944,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
@@ -19477,6 +20961,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private string b_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string B {
           get { return b_ ?? BDefaultValue; }
           set {
@@ -19485,21 +20970,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "b" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasB {
           get { return b_ != null; }
         }
         /// <summary>Clears the value of the "b" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearB() {
           b_ = null;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as FooGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(FooGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -19513,6 +21002,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -19524,11 +21014,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -19549,6 +21041,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(40);
@@ -19565,6 +21058,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -19580,6 +21074,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(FooGroup other) {
           if (other == null) {
             return;
@@ -19594,6 +21089,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -19621,6 +21117,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -19659,19 +21156,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestOneofBackwardsCompatible> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[44]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneofBackwardsCompatible() {
       OnConstruction();
     }
@@ -19679,6 +21180,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneofBackwardsCompatible(TestOneofBackwardsCompatible other) : this() {
       _hasBits0 = other._hasBits0;
       fooInt_ = other.fooInt_;
@@ -19689,6 +21191,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneofBackwardsCompatible Clone() {
       return new TestOneofBackwardsCompatible(this);
     }
@@ -19699,6 +21202,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int fooInt_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FooInt {
       get { if ((_hasBits0 & 1) != 0) { return fooInt_; } else { return FooIntDefaultValue; } }
       set {
@@ -19708,11 +21212,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_int" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooInt {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "foo_int" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooInt() {
       _hasBits0 &= ~1;
     }
@@ -19723,6 +21229,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string fooString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string FooString {
       get { return fooString_ ?? FooStringDefaultValue; }
       set {
@@ -19731,11 +21238,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooString {
       get { return fooString_ != null; }
     }
     /// <summary>Clears the value of the "foo_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooString() {
       fooString_ = null;
     }
@@ -19744,6 +21253,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int FooMessageFieldNumber = 3;
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes fooMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes FooMessage {
       get { return fooMessage_; }
       set {
@@ -19755,6 +21265,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int FooGroupFieldNumber = 4;
     private global::Google.Protobuf.TestProtos.Proto2.TestOneofBackwardsCompatible.Types.FooGroup fooGroup_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestOneofBackwardsCompatible.Types.FooGroup FooGroup {
       get { return fooGroup_; }
       set {
@@ -19763,21 +21274,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the foogroup field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooGroup {
       get { return fooGroup_ != null; }
     }
     /// <summary>Clears the value of the foogroup field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooGroup() {
       fooGroup_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestOneofBackwardsCompatible);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestOneofBackwardsCompatible other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -19793,6 +21308,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasFooInt) hash ^= FooInt.GetHashCode();
@@ -19806,11 +21322,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -19840,6 +21358,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasFooInt) {
         output.WriteRawTag(8);
@@ -19865,6 +21384,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasFooInt) {
@@ -19886,6 +21406,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestOneofBackwardsCompatible other) {
       if (other == null) {
         return;
@@ -19912,6 +21433,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -19951,6 +21473,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -19988,6 +21511,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestOneofBackwardsCompatible message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class FooGroup : pb::IMessage<FooGroup>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -19998,19 +21522,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<FooGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestOneofBackwardsCompatible.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public FooGroup() {
           OnConstruction();
         }
@@ -20018,6 +21546,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public FooGroup(FooGroup other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -20026,6 +21555,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public FooGroup Clone() {
           return new FooGroup(this);
         }
@@ -20036,6 +21566,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -20045,11 +21576,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
@@ -20060,6 +21593,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private string b_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string B {
           get { return b_ ?? BDefaultValue; }
           set {
@@ -20068,21 +21602,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "b" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasB {
           get { return b_ != null; }
         }
         /// <summary>Clears the value of the "b" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearB() {
           b_ = null;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as FooGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(FooGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -20096,6 +21634,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -20107,11 +21646,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -20132,6 +21673,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(40);
@@ -20148,6 +21690,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -20163,6 +21706,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(FooGroup other) {
           if (other == null) {
             return;
@@ -20177,6 +21721,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -20204,6 +21749,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -20242,19 +21788,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestOneof2> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[45]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneof2() {
       OnConstruction();
     }
@@ -20262,6 +21812,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneof2(TestOneof2 other) : this() {
       _hasBits0 = other._hasBits0;
       bazInt_ = other.bazInt_;
@@ -20321,6 +21872,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneof2 Clone() {
       return new TestOneof2(this);
     }
@@ -20328,6 +21880,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_int" field.</summary>
     public const int FooIntFieldNumber = 1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FooInt {
       get { return HasFooInt ? (int) foo_ : 0; }
       set {
@@ -20337,11 +21890,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_int" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooInt {
       get { return fooCase_ == FooOneofCase.FooInt; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foo_int" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooInt() {
       if (HasFooInt) {
         ClearFoo();
@@ -20351,6 +21906,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_string" field.</summary>
     public const int FooStringFieldNumber = 2;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string FooString {
       get { return HasFooString ? (string) foo_ : ""; }
       set {
@@ -20360,11 +21916,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooString {
       get { return fooCase_ == FooOneofCase.FooString; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foo_string" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooString() {
       if (HasFooString) {
         ClearFoo();
@@ -20374,6 +21932,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_cord" field.</summary>
     public const int FooCordFieldNumber = 3;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string FooCord {
       get { return HasFooCord ? (string) foo_ : ""; }
       set {
@@ -20383,11 +21942,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_cord" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooCord {
       get { return fooCase_ == FooOneofCase.FooCord; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foo_cord" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooCord() {
       if (HasFooCord) {
         ClearFoo();
@@ -20397,6 +21958,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_string_piece" field.</summary>
     public const int FooStringPieceFieldNumber = 4;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string FooStringPiece {
       get { return HasFooStringPiece ? (string) foo_ : ""; }
       set {
@@ -20406,11 +21968,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_string_piece" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooStringPiece {
       get { return fooCase_ == FooOneofCase.FooStringPiece; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foo_string_piece" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooStringPiece() {
       if (HasFooStringPiece) {
         ClearFoo();
@@ -20420,6 +21984,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_bytes" field.</summary>
     public const int FooBytesFieldNumber = 5;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString FooBytes {
       get { return HasFooBytes ? (pb::ByteString) foo_ : pb::ByteString.Empty; }
       set {
@@ -20429,11 +21994,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooBytes {
       get { return fooCase_ == FooOneofCase.FooBytes; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foo_bytes" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooBytes() {
       if (HasFooBytes) {
         ClearFoo();
@@ -20443,6 +22010,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_enum" field.</summary>
     public const int FooEnumFieldNumber = 6;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.NestedEnum FooEnum {
       get { return HasFooEnum ? (global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.NestedEnum) foo_ : global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.NestedEnum.Foo; }
       set {
@@ -20452,11 +22020,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooEnum {
       get { return fooCase_ == FooOneofCase.FooEnum; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foo_enum" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooEnum() {
       if (HasFooEnum) {
         ClearFoo();
@@ -20466,6 +22036,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_message" field.</summary>
     public const int FooMessageFieldNumber = 7;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.NestedMessage FooMessage {
       get { return fooCase_ == FooOneofCase.FooMessage ? (global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.NestedMessage) foo_ : null; }
       set {
@@ -20477,6 +22048,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foogroup" field.</summary>
     public const int FooGroupFieldNumber = 8;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.FooGroup FooGroup {
       get { return HasFooGroup ? (global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.FooGroup) foo_ : null; }
       set {
@@ -20486,11 +22058,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foogroup" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooGroup {
       get { return fooCase_ == FooOneofCase.FooGroup; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foogroup" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooGroup() {
       if (HasFooGroup) {
         ClearFoo();
@@ -20500,6 +22074,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_lazy_message" field.</summary>
     public const int FooLazyMessageFieldNumber = 11;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.NestedMessage FooLazyMessage {
       get { return fooCase_ == FooOneofCase.FooLazyMessage ? (global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.NestedMessage) foo_ : null; }
       set {
@@ -20511,6 +22086,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "bar_int" field.</summary>
     public const int BarIntFieldNumber = 12;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int BarInt {
       get { return HasBarInt ? (int) bar_ : 5; }
       set {
@@ -20520,11 +22096,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "bar_int" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBarInt {
       get { return barCase_ == BarOneofCase.BarInt; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "bar_int" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBarInt() {
       if (HasBarInt) {
         ClearBar();
@@ -20534,6 +22112,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "bar_string" field.</summary>
     public const int BarStringFieldNumber = 13;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string BarString {
       get { return HasBarString ? (string) bar_ : global::System.Text.Encoding.UTF8.GetString(global::System.Convert.FromBase64String("U1RSSU5H"), 0, 6); }
       set {
@@ -20543,11 +22122,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "bar_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBarString {
       get { return barCase_ == BarOneofCase.BarString; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "bar_string" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBarString() {
       if (HasBarString) {
         ClearBar();
@@ -20557,6 +22138,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "bar_cord" field.</summary>
     public const int BarCordFieldNumber = 14;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string BarCord {
       get { return HasBarCord ? (string) bar_ : global::System.Text.Encoding.UTF8.GetString(global::System.Convert.FromBase64String("Q09SRA=="), 0, 4); }
       set {
@@ -20566,11 +22148,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "bar_cord" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBarCord {
       get { return barCase_ == BarOneofCase.BarCord; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "bar_cord" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBarCord() {
       if (HasBarCord) {
         ClearBar();
@@ -20580,6 +22164,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "bar_string_piece" field.</summary>
     public const int BarStringPieceFieldNumber = 15;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string BarStringPiece {
       get { return HasBarStringPiece ? (string) bar_ : global::System.Text.Encoding.UTF8.GetString(global::System.Convert.FromBase64String("U1BJRUNF"), 0, 6); }
       set {
@@ -20589,11 +22174,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "bar_string_piece" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBarStringPiece {
       get { return barCase_ == BarOneofCase.BarStringPiece; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "bar_string_piece" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBarStringPiece() {
       if (HasBarStringPiece) {
         ClearBar();
@@ -20603,6 +22190,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "bar_bytes" field.</summary>
     public const int BarBytesFieldNumber = 16;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString BarBytes {
       get { return HasBarBytes ? (pb::ByteString) bar_ : pb::ByteString.FromBase64("QllURVM="); }
       set {
@@ -20612,11 +22200,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "bar_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBarBytes {
       get { return barCase_ == BarOneofCase.BarBytes; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "bar_bytes" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBarBytes() {
       if (HasBarBytes) {
         ClearBar();
@@ -20626,6 +22216,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "bar_enum" field.</summary>
     public const int BarEnumFieldNumber = 17;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.NestedEnum BarEnum {
       get { return HasBarEnum ? (global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.NestedEnum) bar_ : global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Types.NestedEnum.Bar; }
       set {
@@ -20635,11 +22226,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "bar_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBarEnum {
       get { return barCase_ == BarOneofCase.BarEnum; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "bar_enum" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBarEnum() {
       if (HasBarEnum) {
         ClearBar();
@@ -20652,6 +22245,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int bazInt_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int BazInt {
       get { if ((_hasBits0 & 1) != 0) { return bazInt_; } else { return BazIntDefaultValue; } }
       set {
@@ -20661,11 +22255,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "baz_int" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBazInt {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "baz_int" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBazInt() {
       _hasBits0 &= ~1;
     }
@@ -20676,6 +22272,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string bazString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string BazString {
       get { return bazString_ ?? BazStringDefaultValue; }
       set {
@@ -20684,11 +22281,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "baz_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasBazString {
       get { return bazString_ != null; }
     }
     /// <summary>Clears the value of the "baz_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBazString() {
       bazString_ = null;
     }
@@ -20709,11 +22308,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     private FooOneofCase fooCase_ = FooOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooOneofCase FooCase {
       get { return fooCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFoo() {
       fooCase_ = FooOneofCase.None;
       foo_ = null;
@@ -20732,22 +22333,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     private BarOneofCase barCase_ = BarOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarOneofCase BarCase {
       get { return barCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearBar() {
       barCase_ = BarOneofCase.None;
       bar_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestOneof2);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestOneof2 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -20778,6 +22383,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasFooInt) hash ^= FooInt.GetHashCode();
@@ -20806,11 +22412,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -20892,6 +22500,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasFooInt) {
         output.WriteRawTag(8);
@@ -20969,6 +22578,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasFooInt) {
@@ -21029,6 +22639,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestOneof2 other) {
       if (other == null) {
         return;
@@ -21103,6 +22714,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -21205,6 +22817,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -21305,6 +22918,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestOneof2 message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum NestedEnum {
         [pbr::OriginalName("FOO")] Foo = 1,
@@ -21321,19 +22935,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<FooGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public FooGroup() {
           OnConstruction();
         }
@@ -21341,6 +22959,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public FooGroup(FooGroup other) : this() {
           _hasBits0 = other._hasBits0;
           a_ = other.a_;
@@ -21349,6 +22968,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public FooGroup Clone() {
           return new FooGroup(this);
         }
@@ -21359,6 +22979,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int a_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int A {
           get { if ((_hasBits0 & 1) != 0) { return a_; } else { return ADefaultValue; } }
           set {
@@ -21368,11 +22989,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearA() {
           _hasBits0 &= ~1;
         }
@@ -21383,6 +23006,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private string b_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string B {
           get { return b_ ?? BDefaultValue; }
           set {
@@ -21391,21 +23015,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "b" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasB {
           get { return b_ != null; }
         }
         /// <summary>Clears the value of the "b" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearB() {
           b_ = null;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as FooGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(FooGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -21419,6 +23047,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasA) hash ^= A.GetHashCode();
@@ -21430,11 +23059,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -21455,6 +23086,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasA) {
             output.WriteRawTag(72);
@@ -21471,6 +23103,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasA) {
@@ -21486,6 +23119,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(FooGroup other) {
           if (other == null) {
             return;
@@ -21500,6 +23134,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -21527,6 +23162,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -21560,19 +23196,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestOneof2.Descriptor.NestedTypes[1]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -21580,6 +23220,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           _hasBits0 = other._hasBits0;
           quxInt_ = other.quxInt_;
@@ -21588,6 +23229,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -21598,6 +23240,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private long quxInt_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public long QuxInt {
           get { if ((_hasBits0 & 1) != 0) { return quxInt_; } else { return QuxIntDefaultValue; } }
           set {
@@ -21607,11 +23250,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "qux_int" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasQuxInt {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "qux_int" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearQuxInt() {
           _hasBits0 &= ~1;
         }
@@ -21622,16 +23267,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             = pb::FieldCodec.ForInt32(16);
         private readonly pbc::RepeatedField<int> corgeInt_ = new pbc::RepeatedField<int>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<int> CorgeInt {
           get { return corgeInt_; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -21645,6 +23293,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasQuxInt) hash ^= QuxInt.GetHashCode();
@@ -21656,11 +23305,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -21678,6 +23329,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasQuxInt) {
             output.WriteRawTag(8);
@@ -21691,6 +23343,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasQuxInt) {
@@ -21704,6 +23357,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -21716,6 +23370,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -21742,6 +23397,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -21778,19 +23434,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestRequiredOneof> _parser = new pb::MessageParser<TestRequiredOneof>(() => new TestRequiredOneof());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestRequiredOneof> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[46]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredOneof() {
       OnConstruction();
     }
@@ -21798,6 +23458,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredOneof(TestRequiredOneof other) : this() {
       switch (other.FooCase) {
         case FooOneofCase.FooInt:
@@ -21815,6 +23476,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredOneof Clone() {
       return new TestRequiredOneof(this);
     }
@@ -21822,6 +23484,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_int" field.</summary>
     public const int FooIntFieldNumber = 1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FooInt {
       get { return HasFooInt ? (int) foo_ : 0; }
       set {
@@ -21831,11 +23494,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_int" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooInt {
       get { return fooCase_ == FooOneofCase.FooInt; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foo_int" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooInt() {
       if (HasFooInt) {
         ClearFoo();
@@ -21845,6 +23510,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_string" field.</summary>
     public const int FooStringFieldNumber = 2;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string FooString {
       get { return HasFooString ? (string) foo_ : ""; }
       set {
@@ -21854,11 +23520,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "foo_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFooString {
       get { return fooCase_ == FooOneofCase.FooString; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "foo_string" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFooString() {
       if (HasFooString) {
         ClearFoo();
@@ -21868,6 +23536,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "foo_message" field.</summary>
     public const int FooMessageFieldNumber = 3;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestRequiredOneof.Types.NestedMessage FooMessage {
       get { return fooCase_ == FooOneofCase.FooMessage ? (global::Google.Protobuf.TestProtos.Proto2.TestRequiredOneof.Types.NestedMessage) foo_ : null; }
       set {
@@ -21886,22 +23555,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     private FooOneofCase fooCase_ = FooOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooOneofCase FooCase {
       get { return fooCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFoo() {
       fooCase_ = FooOneofCase.None;
       foo_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestRequiredOneof);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestRequiredOneof other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -21917,6 +23590,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasFooInt) hash ^= FooInt.GetHashCode();
@@ -21930,11 +23604,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -21959,6 +23635,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasFooInt) {
         output.WriteRawTag(8);
@@ -21979,6 +23656,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasFooInt) {
@@ -21997,6 +23675,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestRequiredOneof other) {
       if (other == null) {
         return;
@@ -22020,6 +23699,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -22054,6 +23734,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -22086,6 +23767,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestRequiredOneof message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class NestedMessage : pb::IMessage<NestedMessage>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -22096,19 +23778,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestRequiredOneof.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -22116,6 +23802,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           _hasBits0 = other._hasBits0;
           requiredDouble_ = other.requiredDouble_;
@@ -22123,6 +23810,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -22133,6 +23821,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private double requiredDouble_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public double RequiredDouble {
           get { if ((_hasBits0 & 1) != 0) { return requiredDouble_; } else { return RequiredDoubleDefaultValue; } }
           set {
@@ -22142,21 +23831,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "required_double" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasRequiredDouble {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "required_double" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearRequiredDouble() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -22169,6 +23862,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasRequiredDouble) hash ^= pbc::ProtobufEqualityComparers.BitwiseDoubleEqualityComparer.GetHashCode(RequiredDouble);
@@ -22179,11 +23873,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -22200,6 +23896,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasRequiredDouble) {
             output.WriteRawTag(9);
@@ -22212,6 +23909,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasRequiredDouble) {
@@ -22224,6 +23922,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -22235,6 +23934,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -22256,6 +23956,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -22287,19 +23988,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestRequiredMap> _parser = new pb::MessageParser<TestRequiredMap>(() => new TestRequiredMap());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestRequiredMap> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[47]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredMap() {
       OnConstruction();
     }
@@ -22307,12 +24012,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredMap(TestRequiredMap other) : this() {
       foo_ = other.foo_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRequiredMap Clone() {
       return new TestRequiredMap(this);
     }
@@ -22323,16 +24030,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = new pbc::MapField<int, global::Google.Protobuf.TestProtos.Proto2.TestRequiredMap.Types.NestedMessage>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.TestProtos.Proto2.TestRequiredMap.Types.NestedMessage.Parser), 10);
     private readonly pbc::MapField<int, global::Google.Protobuf.TestProtos.Proto2.TestRequiredMap.Types.NestedMessage> foo_ = new pbc::MapField<int, global::Google.Protobuf.TestProtos.Proto2.TestRequiredMap.Types.NestedMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.TestProtos.Proto2.TestRequiredMap.Types.NestedMessage> Foo {
       get { return foo_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestRequiredMap);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestRequiredMap other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -22345,6 +24055,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= Foo.GetHashCode();
@@ -22355,11 +24066,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -22373,6 +24086,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       foo_.WriteTo(ref output, _map_foo_codec);
       if (_unknownFields != null) {
@@ -22382,6 +24096,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += foo_.CalculateSize(_map_foo_codec);
@@ -22392,6 +24107,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestRequiredMap other) {
       if (other == null) {
         return;
@@ -22401,6 +24117,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -22422,6 +24139,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -22441,6 +24159,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestRequiredMap message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class NestedMessage : pb::IMessage<NestedMessage>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -22451,19 +24170,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestRequiredMap.Descriptor.NestedTypes[1]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -22471,6 +24194,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           _hasBits0 = other._hasBits0;
           requiredInt32_ = other.requiredInt32_;
@@ -22478,6 +24202,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -22488,6 +24213,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int requiredInt32_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int RequiredInt32 {
           get { if ((_hasBits0 & 1) != 0) { return requiredInt32_; } else { return RequiredInt32DefaultValue; } }
           set {
@@ -22497,21 +24223,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "required_int32" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasRequiredInt32 {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "required_int32" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearRequiredInt32() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -22524,6 +24254,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasRequiredInt32) hash ^= RequiredInt32.GetHashCode();
@@ -22534,11 +24265,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -22555,6 +24288,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasRequiredInt32) {
             output.WriteRawTag(8);
@@ -22567,6 +24301,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasRequiredInt32) {
@@ -22579,6 +24314,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -22590,6 +24326,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -22611,6 +24348,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -22642,19 +24380,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestPackedTypes> _parser = new pb::MessageParser<TestPackedTypes>(() => new TestPackedTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestPackedTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[48]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestPackedTypes() {
       OnConstruction();
     }
@@ -22662,6 +24404,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestPackedTypes(TestPackedTypes other) : this() {
       packedInt32_ = other.packedInt32_.Clone();
       packedInt64_ = other.packedInt64_.Clone();
@@ -22681,6 +24424,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestPackedTypes Clone() {
       return new TestPackedTypes(this);
     }
@@ -22691,6 +24435,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForInt32(722);
     private readonly pbc::RepeatedField<int> packedInt32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedInt32 {
       get { return packedInt32_; }
     }
@@ -22701,6 +24446,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForInt64(730);
     private readonly pbc::RepeatedField<long> packedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedInt64 {
       get { return packedInt64_; }
     }
@@ -22711,6 +24457,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForUInt32(738);
     private readonly pbc::RepeatedField<uint> packedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> PackedUint32 {
       get { return packedUint32_; }
     }
@@ -22721,6 +24468,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForUInt64(746);
     private readonly pbc::RepeatedField<ulong> packedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> PackedUint64 {
       get { return packedUint64_; }
     }
@@ -22731,6 +24479,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSInt32(754);
     private readonly pbc::RepeatedField<int> packedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedSint32 {
       get { return packedSint32_; }
     }
@@ -22741,6 +24490,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSInt64(762);
     private readonly pbc::RepeatedField<long> packedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedSint64 {
       get { return packedSint64_; }
     }
@@ -22751,6 +24501,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForFixed32(770);
     private readonly pbc::RepeatedField<uint> packedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> PackedFixed32 {
       get { return packedFixed32_; }
     }
@@ -22761,6 +24512,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForFixed64(778);
     private readonly pbc::RepeatedField<ulong> packedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> PackedFixed64 {
       get { return packedFixed64_; }
     }
@@ -22771,6 +24523,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSFixed32(786);
     private readonly pbc::RepeatedField<int> packedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedSfixed32 {
       get { return packedSfixed32_; }
     }
@@ -22781,6 +24534,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSFixed64(794);
     private readonly pbc::RepeatedField<long> packedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedSfixed64 {
       get { return packedSfixed64_; }
     }
@@ -22791,6 +24545,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForFloat(802);
     private readonly pbc::RepeatedField<float> packedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> PackedFloat {
       get { return packedFloat_; }
     }
@@ -22801,6 +24556,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForDouble(810);
     private readonly pbc::RepeatedField<double> packedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> PackedDouble {
       get { return packedDouble_; }
     }
@@ -22811,6 +24567,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForBool(818);
     private readonly pbc::RepeatedField<bool> packedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> PackedBool {
       get { return packedBool_; }
     }
@@ -22821,16 +24578,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForEnum(826, x => (int) x, x => (global::Google.Protobuf.TestProtos.Proto2.ForeignEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum> packedEnum_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum> PackedEnum {
       get { return packedEnum_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestPackedTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestPackedTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -22856,6 +24616,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= packedInt32_.GetHashCode();
@@ -22879,11 +24640,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -22910,6 +24673,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       packedInt32_.WriteTo(ref output, _repeated_packedInt32_codec);
       packedInt64_.WriteTo(ref output, _repeated_packedInt64_codec);
@@ -22932,6 +24696,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += packedInt32_.CalculateSize(_repeated_packedInt32_codec);
@@ -22955,6 +24720,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestPackedTypes other) {
       if (other == null) {
         return;
@@ -22977,6 +24743,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -23064,6 +24831,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -23160,19 +24928,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestUnpackedTypes> _parser = new pb::MessageParser<TestUnpackedTypes>(() => new TestUnpackedTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestUnpackedTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[49]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestUnpackedTypes() {
       OnConstruction();
     }
@@ -23180,6 +24952,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestUnpackedTypes(TestUnpackedTypes other) : this() {
       unpackedInt32_ = other.unpackedInt32_.Clone();
       unpackedInt64_ = other.unpackedInt64_.Clone();
@@ -23199,6 +24972,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestUnpackedTypes Clone() {
       return new TestUnpackedTypes(this);
     }
@@ -23209,6 +24983,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForInt32(720);
     private readonly pbc::RepeatedField<int> unpackedInt32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedInt32 {
       get { return unpackedInt32_; }
     }
@@ -23219,6 +24994,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForInt64(728);
     private readonly pbc::RepeatedField<long> unpackedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedInt64 {
       get { return unpackedInt64_; }
     }
@@ -23229,6 +25005,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForUInt32(736);
     private readonly pbc::RepeatedField<uint> unpackedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> UnpackedUint32 {
       get { return unpackedUint32_; }
     }
@@ -23239,6 +25016,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForUInt64(744);
     private readonly pbc::RepeatedField<ulong> unpackedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> UnpackedUint64 {
       get { return unpackedUint64_; }
     }
@@ -23249,6 +25027,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSInt32(752);
     private readonly pbc::RepeatedField<int> unpackedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedSint32 {
       get { return unpackedSint32_; }
     }
@@ -23259,6 +25038,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSInt64(760);
     private readonly pbc::RepeatedField<long> unpackedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedSint64 {
       get { return unpackedSint64_; }
     }
@@ -23269,6 +25049,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForFixed32(773);
     private readonly pbc::RepeatedField<uint> unpackedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> UnpackedFixed32 {
       get { return unpackedFixed32_; }
     }
@@ -23279,6 +25060,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForFixed64(777);
     private readonly pbc::RepeatedField<ulong> unpackedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> UnpackedFixed64 {
       get { return unpackedFixed64_; }
     }
@@ -23289,6 +25071,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSFixed32(789);
     private readonly pbc::RepeatedField<int> unpackedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedSfixed32 {
       get { return unpackedSfixed32_; }
     }
@@ -23299,6 +25082,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSFixed64(793);
     private readonly pbc::RepeatedField<long> unpackedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedSfixed64 {
       get { return unpackedSfixed64_; }
     }
@@ -23309,6 +25093,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForFloat(805);
     private readonly pbc::RepeatedField<float> unpackedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> UnpackedFloat {
       get { return unpackedFloat_; }
     }
@@ -23319,6 +25104,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForDouble(809);
     private readonly pbc::RepeatedField<double> unpackedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> UnpackedDouble {
       get { return unpackedDouble_; }
     }
@@ -23329,6 +25115,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForBool(816);
     private readonly pbc::RepeatedField<bool> unpackedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> UnpackedBool {
       get { return unpackedBool_; }
     }
@@ -23339,16 +25126,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForEnum(824, x => (int) x, x => (global::Google.Protobuf.TestProtos.Proto2.ForeignEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum> unpackedEnum_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.ForeignEnum> UnpackedEnum {
       get { return unpackedEnum_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestUnpackedTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestUnpackedTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -23374,6 +25164,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= unpackedInt32_.GetHashCode();
@@ -23397,11 +25188,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -23428,6 +25221,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       unpackedInt32_.WriteTo(ref output, _repeated_unpackedInt32_codec);
       unpackedInt64_.WriteTo(ref output, _repeated_unpackedInt64_codec);
@@ -23450,6 +25244,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += unpackedInt32_.CalculateSize(_repeated_unpackedInt32_codec);
@@ -23473,6 +25268,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestUnpackedTypes other) {
       if (other == null) {
         return;
@@ -23495,6 +25291,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -23582,6 +25379,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -23676,19 +25474,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::ExtensionSet<TestPackedExtensions> _extensions;
     private pb::ExtensionSet<TestPackedExtensions> _Extensions { get { return _extensions; } }
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestPackedExtensions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[50]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestPackedExtensions() {
       OnConstruction();
     }
@@ -23696,22 +25498,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestPackedExtensions(TestPackedExtensions other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
       _extensions = pb::ExtensionSet.Clone(other._extensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestPackedExtensions Clone() {
       return new TestPackedExtensions(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestPackedExtensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestPackedExtensions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -23726,6 +25532,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_extensions != null) {
@@ -23738,11 +25545,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -23758,6 +25567,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_extensions != null) {
         _extensions.WriteTo(ref output);
@@ -23769,6 +25579,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_extensions != null) {
@@ -23781,6 +25592,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestPackedExtensions other) {
       if (other == null) {
         return;
@@ -23790,6 +25602,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -23809,6 +25622,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -23857,19 +25671,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::ExtensionSet<TestUnpackedExtensions> _extensions;
     private pb::ExtensionSet<TestUnpackedExtensions> _Extensions { get { return _extensions; } }
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestUnpackedExtensions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[51]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestUnpackedExtensions() {
       OnConstruction();
     }
@@ -23877,22 +25695,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestUnpackedExtensions(TestUnpackedExtensions other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
       _extensions = pb::ExtensionSet.Clone(other._extensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestUnpackedExtensions Clone() {
       return new TestUnpackedExtensions(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestUnpackedExtensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestUnpackedExtensions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -23907,6 +25729,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_extensions != null) {
@@ -23919,11 +25742,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -23939,6 +25764,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_extensions != null) {
         _extensions.WriteTo(ref output);
@@ -23950,6 +25776,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_extensions != null) {
@@ -23962,6 +25789,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestUnpackedExtensions other) {
       if (other == null) {
         return;
@@ -23971,6 +25799,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -23990,6 +25819,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -24042,19 +25872,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestDynamicExtensions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[52]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDynamicExtensions() {
       OnConstruction();
     }
@@ -24062,6 +25896,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDynamicExtensions(TestDynamicExtensions other) : this() {
       _hasBits0 = other._hasBits0;
       scalarExtension_ = other.scalarExtension_;
@@ -24075,6 +25910,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDynamicExtensions Clone() {
       return new TestDynamicExtensions(this);
     }
@@ -24085,6 +25921,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private uint scalarExtension_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint ScalarExtension {
       get { if ((_hasBits0 & 1) != 0) { return scalarExtension_; } else { return ScalarExtensionDefaultValue; } }
       set {
@@ -24094,11 +25931,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "scalar_extension" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasScalarExtension {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "scalar_extension" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearScalarExtension() {
       _hasBits0 &= ~1;
     }
@@ -24109,6 +25948,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.ForeignEnum enumExtension_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ForeignEnum EnumExtension {
       get { if ((_hasBits0 & 2) != 0) { return enumExtension_; } else { return EnumExtensionDefaultValue; } }
       set {
@@ -24118,11 +25958,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "enum_extension" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasEnumExtension {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "enum_extension" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearEnumExtension() {
       _hasBits0 &= ~2;
     }
@@ -24133,6 +25975,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.TestDynamicExtensions.Types.DynamicEnumType dynamicEnumExtension_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestDynamicExtensions.Types.DynamicEnumType DynamicEnumExtension {
       get { if ((_hasBits0 & 4) != 0) { return dynamicEnumExtension_; } else { return DynamicEnumExtensionDefaultValue; } }
       set {
@@ -24142,11 +25985,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "dynamic_enum_extension" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDynamicEnumExtension {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "dynamic_enum_extension" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDynamicEnumExtension() {
       _hasBits0 &= ~4;
     }
@@ -24155,6 +26000,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int MessageExtensionFieldNumber = 2003;
     private global::Google.Protobuf.TestProtos.Proto2.ForeignMessage messageExtension_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ForeignMessage MessageExtension {
       get { return messageExtension_; }
       set {
@@ -24166,6 +26012,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int DynamicMessageExtensionFieldNumber = 2004;
     private global::Google.Protobuf.TestProtos.Proto2.TestDynamicExtensions.Types.DynamicMessageType dynamicMessageExtension_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestDynamicExtensions.Types.DynamicMessageType DynamicMessageExtension {
       get { return dynamicMessageExtension_; }
       set {
@@ -24179,6 +26026,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForString(16042);
     private readonly pbc::RepeatedField<string> repeatedExtension_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedExtension {
       get { return repeatedExtension_; }
     }
@@ -24189,16 +26037,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForSInt32(16050);
     private readonly pbc::RepeatedField<int> packedExtension_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedExtension {
       get { return packedExtension_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestDynamicExtensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestDynamicExtensions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -24217,6 +26068,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasScalarExtension) hash ^= ScalarExtension.GetHashCode();
@@ -24233,11 +26085,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -24272,6 +26126,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasScalarExtension) {
         output.WriteRawTag(133, 125);
@@ -24302,6 +26157,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasScalarExtension) {
@@ -24328,6 +26184,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestDynamicExtensions other) {
       if (other == null) {
         return;
@@ -24359,6 +26216,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -24411,6 +26269,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -24461,6 +26320,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestDynamicExtensions message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum DynamicEnumType {
         [pbr::OriginalName("DYNAMIC_FOO")] DynamicFoo = 2200,
@@ -24477,19 +26337,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<DynamicMessageType> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestDynamicExtensions.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public DynamicMessageType() {
           OnConstruction();
         }
@@ -24497,6 +26361,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public DynamicMessageType(DynamicMessageType other) : this() {
           _hasBits0 = other._hasBits0;
           dynamicField_ = other.dynamicField_;
@@ -24504,6 +26369,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public DynamicMessageType Clone() {
           return new DynamicMessageType(this);
         }
@@ -24514,6 +26380,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int dynamicField_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int DynamicField {
           get { if ((_hasBits0 & 1) != 0) { return dynamicField_; } else { return DynamicFieldDefaultValue; } }
           set {
@@ -24523,21 +26390,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "dynamic_field" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasDynamicField {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "dynamic_field" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearDynamicField() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as DynamicMessageType);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(DynamicMessageType other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -24550,6 +26421,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasDynamicField) hash ^= DynamicField.GetHashCode();
@@ -24560,11 +26432,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -24581,6 +26455,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasDynamicField) {
             output.WriteRawTag(160, 131, 1);
@@ -24593,6 +26468,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasDynamicField) {
@@ -24605,6 +26481,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(DynamicMessageType other) {
           if (other == null) {
             return;
@@ -24616,6 +26493,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -24637,6 +26515,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -24668,19 +26547,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestRepeatedScalarDifferentTagSizes> _parser = new pb::MessageParser<TestRepeatedScalarDifferentTagSizes>(() => new TestRepeatedScalarDifferentTagSizes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestRepeatedScalarDifferentTagSizes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[53]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRepeatedScalarDifferentTagSizes() {
       OnConstruction();
     }
@@ -24688,6 +26571,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRepeatedScalarDifferentTagSizes(TestRepeatedScalarDifferentTagSizes other) : this() {
       repeatedFixed32_ = other.repeatedFixed32_.Clone();
       repeatedInt32_ = other.repeatedInt32_.Clone();
@@ -24699,6 +26583,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRepeatedScalarDifferentTagSizes Clone() {
       return new TestRepeatedScalarDifferentTagSizes(this);
     }
@@ -24714,6 +26599,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// in TestAllTypes didn't trigger the check.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> RepeatedFixed32 {
       get { return repeatedFixed32_; }
     }
@@ -24727,6 +26613,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// Check for a varint type, just for good measure.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedInt32 {
       get { return repeatedInt32_; }
     }
@@ -24740,6 +26627,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// These have two-byte tags.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedFixed64 {
       get { return repeatedFixed64_; }
     }
@@ -24750,6 +26638,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForInt64(16376);
     private readonly pbc::RepeatedField<long> repeatedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedInt64 {
       get { return repeatedInt64_; }
     }
@@ -24763,6 +26652,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// Three byte tags.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> RepeatedFloat {
       get { return repeatedFloat_; }
     }
@@ -24773,16 +26663,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForUInt64(2097144);
     private readonly pbc::RepeatedField<ulong> repeatedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedUint64 {
       get { return repeatedUint64_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestRepeatedScalarDifferentTagSizes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestRepeatedScalarDifferentTagSizes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -24800,6 +26693,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= repeatedFixed32_.GetHashCode();
@@ -24815,11 +26709,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -24838,6 +26734,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       repeatedFixed32_.WriteTo(ref output, _repeated_repeatedFixed32_codec);
       repeatedInt32_.WriteTo(ref output, _repeated_repeatedInt32_codec);
@@ -24852,6 +26749,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += repeatedFixed32_.CalculateSize(_repeated_repeatedFixed32_codec);
@@ -24867,6 +26765,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestRepeatedScalarDifferentTagSizes other) {
       if (other == null) {
         return;
@@ -24881,6 +26780,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -24928,6 +26828,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -24986,19 +26887,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::ExtensionSet<TestParsingMerge> _extensions;
     private pb::ExtensionSet<TestParsingMerge> _Extensions { get { return _extensions; } }
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestParsingMerge> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[54]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestParsingMerge() {
       OnConstruction();
     }
@@ -25006,6 +26911,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestParsingMerge(TestParsingMerge other) : this() {
       requiredAllTypes_ = other.requiredAllTypes_ != null ? other.requiredAllTypes_.Clone() : null;
       optionalAllTypes_ = other.optionalAllTypes_ != null ? other.optionalAllTypes_.Clone() : null;
@@ -25017,6 +26923,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestParsingMerge Clone() {
       return new TestParsingMerge(this);
     }
@@ -25025,6 +26932,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int RequiredAllTypesFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes requiredAllTypes_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes RequiredAllTypes {
       get { return requiredAllTypes_; }
       set {
@@ -25036,6 +26944,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalAllTypesFieldNumber = 2;
     private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes optionalAllTypes_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes OptionalAllTypes {
       get { return optionalAllTypes_; }
       set {
@@ -25049,6 +26958,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForMessage(26, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> repeatedAllTypes_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> RepeatedAllTypes {
       get { return repeatedAllTypes_; }
     }
@@ -25057,6 +26967,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalGroupFieldNumber = 10;
     private global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.OptionalGroup optionalGroup_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.OptionalGroup OptionalGroup {
       get { return optionalGroup_; }
       set {
@@ -25065,11 +26976,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the optionalgroup field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalGroup {
       get { return optionalGroup_ != null; }
     }
     /// <summary>Clears the value of the optionalgroup field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalGroup() {
       optionalGroup_ = null;
     }
@@ -25080,16 +26993,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForGroup(163, 164, global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedGroup.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedGroup> repeatedGroup_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedGroup>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedGroup> RepeatedGroup {
       get { return repeatedGroup_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestParsingMerge);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestParsingMerge other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -25109,6 +27025,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (requiredAllTypes_ != null) hash ^= RequiredAllTypes.GetHashCode();
@@ -25126,11 +27043,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -25161,6 +27080,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (requiredAllTypes_ != null) {
         output.WriteRawTag(10);
@@ -25187,6 +27107,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (requiredAllTypes_ != null) {
@@ -25210,6 +27131,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestParsingMerge other) {
       if (other == null) {
         return;
@@ -25239,6 +27161,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -25287,6 +27210,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -25355,6 +27279,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestParsingMerge message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       /// <summary>
       /// RepeatedFieldsGenerator defines matching field types as TestParsingMerge,
@@ -25371,19 +27296,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private static readonly pb::MessageParser<RepeatedFieldsGenerator> _parser = new pb::MessageParser<RepeatedFieldsGenerator>(() => new RepeatedFieldsGenerator());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<RepeatedFieldsGenerator> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public RepeatedFieldsGenerator() {
           OnConstruction();
         }
@@ -25391,6 +27320,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public RepeatedFieldsGenerator(RepeatedFieldsGenerator other) : this() {
           field1_ = other.field1_.Clone();
           field2_ = other.field2_.Clone();
@@ -25403,6 +27333,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public RepeatedFieldsGenerator Clone() {
           return new RepeatedFieldsGenerator(this);
         }
@@ -25413,6 +27344,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             = pb::FieldCodec.ForMessage(10, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Parser);
         private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> field1_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> Field1 {
           get { return field1_; }
         }
@@ -25423,6 +27355,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             = pb::FieldCodec.ForMessage(18, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Parser);
         private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> field2_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> Field2 {
           get { return field2_; }
         }
@@ -25433,6 +27366,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             = pb::FieldCodec.ForMessage(26, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Parser);
         private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> field3_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> Field3 {
           get { return field3_; }
         }
@@ -25443,6 +27377,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             = pb::FieldCodec.ForGroup(83, 84, global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedFieldsGenerator.Types.Group1.Parser);
         private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedFieldsGenerator.Types.Group1> group1_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedFieldsGenerator.Types.Group1>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedFieldsGenerator.Types.Group1> Group1 {
           get { return group1_; }
         }
@@ -25453,6 +27388,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             = pb::FieldCodec.ForGroup(163, 164, global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedFieldsGenerator.Types.Group2.Parser);
         private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedFieldsGenerator.Types.Group2> group2_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedFieldsGenerator.Types.Group2>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedFieldsGenerator.Types.Group2> Group2 {
           get { return group2_; }
         }
@@ -25463,6 +27399,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             = pb::FieldCodec.ForMessage(8002, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Parser);
         private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> ext1_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> Ext1 {
           get { return ext1_; }
         }
@@ -25473,16 +27410,19 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             = pb::FieldCodec.ForMessage(8010, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Parser);
         private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> ext2_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> Ext2 {
           get { return ext2_; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as RepeatedFieldsGenerator);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(RepeatedFieldsGenerator other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -25501,6 +27441,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           hash ^= field1_.GetHashCode();
@@ -25517,11 +27458,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -25541,6 +27484,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           field1_.WriteTo(ref output, _repeated_field1_codec);
           field2_.WriteTo(ref output, _repeated_field2_codec);
@@ -25556,6 +27500,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           size += field1_.CalculateSize(_repeated_field1_codec);
@@ -25572,6 +27517,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(RepeatedFieldsGenerator other) {
           if (other == null) {
             return;
@@ -25587,6 +27533,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -25632,6 +27579,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -25675,6 +27623,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #region Nested types
         /// <summary>Container for nested types declared in the RepeatedFieldsGenerator message type.</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static partial class Types {
           public sealed partial class Group1 : pb::IMessage<Group1>
           #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -25684,19 +27633,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             private static readonly pb::MessageParser<Group1> _parser = new pb::MessageParser<Group1>(() => new Group1());
             private pb::UnknownFieldSet _unknownFields;
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public static pb::MessageParser<Group1> Parser { get { return _parser; } }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public static pbr::MessageDescriptor Descriptor {
               get { return global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedFieldsGenerator.Descriptor.NestedTypes[0]; }
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             pbr::MessageDescriptor pb::IMessage.Descriptor {
               get { return Descriptor; }
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public Group1() {
               OnConstruction();
             }
@@ -25704,12 +27657,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             partial void OnConstruction();
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public Group1(Group1 other) : this() {
               field1_ = other.field1_ != null ? other.field1_.Clone() : null;
               _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public Group1 Clone() {
               return new Group1(this);
             }
@@ -25718,6 +27673,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             public const int Field1FieldNumber = 11;
             private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes field1_;
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes Field1 {
               get { return field1_; }
               set {
@@ -25726,11 +27682,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override bool Equals(object other) {
               return Equals(other as Group1);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public bool Equals(Group1 other) {
               if (ReferenceEquals(other, null)) {
                 return false;
@@ -25743,6 +27701,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override int GetHashCode() {
               int hash = 1;
               if (field1_ != null) hash ^= Field1.GetHashCode();
@@ -25753,11 +27712,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override string ToString() {
               return pb::JsonFormatter.ToDiagnosticString(this);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void WriteTo(pb::CodedOutputStream output) {
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
               output.WriteRawMessage(this);
@@ -25774,6 +27735,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
               if (field1_ != null) {
                 output.WriteRawTag(90);
@@ -25786,6 +27748,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             #endif
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public int CalculateSize() {
               int size = 0;
               if (field1_ != null) {
@@ -25798,6 +27761,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void MergeFrom(Group1 other) {
               if (other == null) {
                 return;
@@ -25812,6 +27776,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void MergeFrom(pb::CodedInputStream input) {
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
               input.ReadRawMessage(this);
@@ -25838,6 +27803,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
               uint tag;
               while ((tag = input.ReadTag()) != 0) {
@@ -25869,19 +27835,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             private static readonly pb::MessageParser<Group2> _parser = new pb::MessageParser<Group2>(() => new Group2());
             private pb::UnknownFieldSet _unknownFields;
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public static pb::MessageParser<Group2> Parser { get { return _parser; } }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public static pbr::MessageDescriptor Descriptor {
               get { return global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Types.RepeatedFieldsGenerator.Descriptor.NestedTypes[1]; }
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             pbr::MessageDescriptor pb::IMessage.Descriptor {
               get { return Descriptor; }
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public Group2() {
               OnConstruction();
             }
@@ -25889,12 +27859,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             partial void OnConstruction();
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public Group2(Group2 other) : this() {
               field1_ = other.field1_ != null ? other.field1_.Clone() : null;
               _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public Group2 Clone() {
               return new Group2(this);
             }
@@ -25903,6 +27875,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             public const int Field1FieldNumber = 21;
             private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes field1_;
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes Field1 {
               get { return field1_; }
               set {
@@ -25911,11 +27884,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override bool Equals(object other) {
               return Equals(other as Group2);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public bool Equals(Group2 other) {
               if (ReferenceEquals(other, null)) {
                 return false;
@@ -25928,6 +27903,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override int GetHashCode() {
               int hash = 1;
               if (field1_ != null) hash ^= Field1.GetHashCode();
@@ -25938,11 +27914,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override string ToString() {
               return pb::JsonFormatter.ToDiagnosticString(this);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void WriteTo(pb::CodedOutputStream output) {
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
               output.WriteRawMessage(this);
@@ -25959,6 +27937,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
               if (field1_ != null) {
                 output.WriteRawTag(170, 1);
@@ -25971,6 +27950,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             #endif
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public int CalculateSize() {
               int size = 0;
               if (field1_ != null) {
@@ -25983,6 +27963,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void MergeFrom(Group2 other) {
               if (other == null) {
                 return;
@@ -25997,6 +27978,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void MergeFrom(pb::CodedInputStream input) {
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
               input.ReadRawMessage(this);
@@ -26023,6 +28005,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
               uint tag;
               while ((tag = input.ReadTag()) != 0) {
@@ -26059,19 +28042,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private static readonly pb::MessageParser<OptionalGroup> _parser = new pb::MessageParser<OptionalGroup>(() => new OptionalGroup());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<OptionalGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Descriptor.NestedTypes[1]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup() {
           OnConstruction();
         }
@@ -26079,12 +28066,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup(OptionalGroup other) : this() {
           optionalGroupAllTypes_ = other.optionalGroupAllTypes_ != null ? other.optionalGroupAllTypes_.Clone() : null;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup Clone() {
           return new OptionalGroup(this);
         }
@@ -26093,6 +28082,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         public const int OptionalGroupAllTypesFieldNumber = 11;
         private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes optionalGroupAllTypes_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes OptionalGroupAllTypes {
           get { return optionalGroupAllTypes_; }
           set {
@@ -26101,11 +28091,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as OptionalGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(OptionalGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -26118,6 +28110,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (optionalGroupAllTypes_ != null) hash ^= OptionalGroupAllTypes.GetHashCode();
@@ -26128,11 +28121,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -26149,6 +28144,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (optionalGroupAllTypes_ != null) {
             output.WriteRawTag(90);
@@ -26161,6 +28157,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (optionalGroupAllTypes_ != null) {
@@ -26173,6 +28170,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(OptionalGroup other) {
           if (other == null) {
             return;
@@ -26187,6 +28185,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -26213,6 +28212,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -26244,19 +28244,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private static readonly pb::MessageParser<RepeatedGroup> _parser = new pb::MessageParser<RepeatedGroup>(() => new RepeatedGroup());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<RepeatedGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge.Descriptor.NestedTypes[2]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public RepeatedGroup() {
           OnConstruction();
         }
@@ -26264,12 +28268,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public RepeatedGroup(RepeatedGroup other) : this() {
           repeatedGroupAllTypes_ = other.repeatedGroupAllTypes_ != null ? other.repeatedGroupAllTypes_.Clone() : null;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public RepeatedGroup Clone() {
           return new RepeatedGroup(this);
         }
@@ -26278,6 +28284,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         public const int RepeatedGroupAllTypesFieldNumber = 21;
         private global::Google.Protobuf.TestProtos.Proto2.TestAllTypes repeatedGroupAllTypes_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes RepeatedGroupAllTypes {
           get { return repeatedGroupAllTypes_; }
           set {
@@ -26286,11 +28293,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as RepeatedGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(RepeatedGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -26303,6 +28312,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (repeatedGroupAllTypes_ != null) hash ^= RepeatedGroupAllTypes.GetHashCode();
@@ -26313,11 +28323,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -26334,6 +28346,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (repeatedGroupAllTypes_ != null) {
             output.WriteRawTag(170, 1);
@@ -26346,6 +28359,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (repeatedGroupAllTypes_ != null) {
@@ -26358,6 +28372,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(RepeatedGroup other) {
           if (other == null) {
             return;
@@ -26372,6 +28387,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -26398,6 +28414,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -26427,6 +28444,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Extensions
     /// <summary>Container for extensions for other messages declared in the TestParsingMerge message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Extensions {
       public static readonly pb::Extension<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes> OptionalExt =
         new pb::Extension<global::Google.Protobuf.TestProtos.Proto2.TestParsingMerge, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes>(1000, pb::FieldCodec.ForMessage(8002, global::Google.Protobuf.TestProtos.Proto2.TestAllTypes.Parser));
@@ -26445,19 +28463,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<TestCommentInjectionMessage> _parser = new pb::MessageParser<TestCommentInjectionMessage>(() => new TestCommentInjectionMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestCommentInjectionMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[55]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCommentInjectionMessage() {
       OnConstruction();
     }
@@ -26465,12 +28487,14 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCommentInjectionMessage(TestCommentInjectionMessage other) : this() {
       a_ = other.a_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCommentInjectionMessage Clone() {
       return new TestCommentInjectionMessage(this);
     }
@@ -26484,6 +28508,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// */ &lt;- This should not close the generated doc comment
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string A {
       get { return a_ ?? ADefaultValue; }
       set {
@@ -26492,21 +28517,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "a" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasA {
       get { return a_ != null; }
     }
     /// <summary>Clears the value of the "a" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearA() {
       a_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestCommentInjectionMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestCommentInjectionMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -26519,6 +28548,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasA) hash ^= A.GetHashCode();
@@ -26529,11 +28559,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -26550,6 +28582,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasA) {
         output.WriteRawTag(10);
@@ -26562,6 +28595,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasA) {
@@ -26574,6 +28608,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestCommentInjectionMessage other) {
       if (other == null) {
         return;
@@ -26585,6 +28620,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -26606,6 +28642,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -26635,19 +28672,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<FooRequest> _parser = new pb::MessageParser<FooRequest>(() => new FooRequest());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FooRequest> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[56]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooRequest() {
       OnConstruction();
     }
@@ -26655,21 +28696,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooRequest(FooRequest other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooRequest Clone() {
       return new FooRequest(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FooRequest);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FooRequest other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -26681,6 +28726,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -26690,11 +28736,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -26707,6 +28755,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -26715,6 +28764,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -26724,6 +28774,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FooRequest other) {
       if (other == null) {
         return;
@@ -26732,6 +28783,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -26749,6 +28801,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -26771,19 +28824,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<FooResponse> _parser = new pb::MessageParser<FooResponse>(() => new FooResponse());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FooResponse> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[57]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooResponse() {
       OnConstruction();
     }
@@ -26791,21 +28848,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooResponse(FooResponse other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooResponse Clone() {
       return new FooResponse(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FooResponse);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FooResponse other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -26817,6 +28878,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -26826,11 +28888,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -26843,6 +28907,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -26851,6 +28916,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -26860,6 +28926,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FooResponse other) {
       if (other == null) {
         return;
@@ -26868,6 +28935,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -26885,6 +28953,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -26907,19 +28976,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<FooClientMessage> _parser = new pb::MessageParser<FooClientMessage>(() => new FooClientMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FooClientMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[58]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooClientMessage() {
       OnConstruction();
     }
@@ -26927,21 +29000,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooClientMessage(FooClientMessage other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooClientMessage Clone() {
       return new FooClientMessage(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FooClientMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FooClientMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -26953,6 +29030,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -26962,11 +29040,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -26979,6 +29059,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -26987,6 +29068,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -26996,6 +29078,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FooClientMessage other) {
       if (other == null) {
         return;
@@ -27004,6 +29087,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -27021,6 +29105,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -27043,19 +29128,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<FooServerMessage> _parser = new pb::MessageParser<FooServerMessage>(() => new FooServerMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FooServerMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[59]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooServerMessage() {
       OnConstruction();
     }
@@ -27063,21 +29152,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooServerMessage(FooServerMessage other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooServerMessage Clone() {
       return new FooServerMessage(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FooServerMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FooServerMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -27089,6 +29182,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -27098,11 +29192,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -27115,6 +29211,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -27123,6 +29220,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -27132,6 +29230,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FooServerMessage other) {
       if (other == null) {
         return;
@@ -27140,6 +29239,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -27157,6 +29257,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -27179,19 +29280,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<BarRequest> _parser = new pb::MessageParser<BarRequest>(() => new BarRequest());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<BarRequest> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[60]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarRequest() {
       OnConstruction();
     }
@@ -27199,21 +29304,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarRequest(BarRequest other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarRequest Clone() {
       return new BarRequest(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as BarRequest);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(BarRequest other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -27225,6 +29334,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -27234,11 +29344,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -27251,6 +29363,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -27259,6 +29372,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -27268,6 +29382,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(BarRequest other) {
       if (other == null) {
         return;
@@ -27276,6 +29391,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -27293,6 +29409,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -27315,19 +29432,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private static readonly pb::MessageParser<BarResponse> _parser = new pb::MessageParser<BarResponse>(() => new BarResponse());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<BarResponse> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[61]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarResponse() {
       OnConstruction();
     }
@@ -27335,21 +29456,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarResponse(BarResponse other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarResponse Clone() {
       return new BarResponse(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as BarResponse);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(BarResponse other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -27361,6 +29486,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -27370,11 +29496,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -27387,6 +29515,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -27395,6 +29524,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -27404,6 +29534,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(BarResponse other) {
       if (other == null) {
         return;
@@ -27412,6 +29543,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -27429,6 +29561,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -27452,19 +29585,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestJsonName> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[62]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestJsonName() {
       OnConstruction();
     }
@@ -27472,6 +29609,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestJsonName(TestJsonName other) : this() {
       _hasBits0 = other._hasBits0;
       fieldName1_ = other.fieldName1_;
@@ -27484,6 +29622,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestJsonName Clone() {
       return new TestJsonName(this);
     }
@@ -27494,6 +29633,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int fieldName1_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName1 {
       get { if ((_hasBits0 & 1) != 0) { return fieldName1_; } else { return FieldName1DefaultValue; } }
       set {
@@ -27503,11 +29643,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field_name1" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName1 {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "field_name1" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName1() {
       _hasBits0 &= ~1;
     }
@@ -27518,6 +29660,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int fieldName2_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName2 {
       get { if ((_hasBits0 & 2) != 0) { return fieldName2_; } else { return FieldName2DefaultValue; } }
       set {
@@ -27527,11 +29670,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "fieldName2" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName2 {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "fieldName2" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName2() {
       _hasBits0 &= ~2;
     }
@@ -27542,6 +29687,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int fieldName3_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName3 {
       get { if ((_hasBits0 & 4) != 0) { return fieldName3_; } else { return FieldName3DefaultValue; } }
       set {
@@ -27551,11 +29697,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "FieldName3" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName3 {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "FieldName3" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName3() {
       _hasBits0 &= ~4;
     }
@@ -27566,6 +29714,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int FieldName4_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName4 {
       get { if ((_hasBits0 & 8) != 0) { return FieldName4_; } else { return FieldName4DefaultValue; } }
       set {
@@ -27575,11 +29724,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "_field_name4" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName4 {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "_field_name4" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName4() {
       _hasBits0 &= ~8;
     }
@@ -27590,6 +29741,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int fIELDNAME5_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FIELDNAME5 {
       get { if ((_hasBits0 & 16) != 0) { return fIELDNAME5_; } else { return FIELDNAME5DefaultValue; } }
       set {
@@ -27599,11 +29751,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "FIELD_NAME5" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFIELDNAME5 {
       get { return (_hasBits0 & 16) != 0; }
     }
     /// <summary>Clears the value of the "FIELD_NAME5" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFIELDNAME5() {
       _hasBits0 &= ~16;
     }
@@ -27614,6 +29768,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int fieldName6_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FieldName6 {
       get { if ((_hasBits0 & 32) != 0) { return fieldName6_; } else { return FieldName6DefaultValue; } }
       set {
@@ -27623,21 +29778,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field_name6" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFieldName6 {
       get { return (_hasBits0 & 32) != 0; }
     }
     /// <summary>Clears the value of the "field_name6" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFieldName6() {
       _hasBits0 &= ~32;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestJsonName);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestJsonName other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -27655,6 +29814,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasFieldName1) hash ^= FieldName1.GetHashCode();
@@ -27670,11 +29830,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -27711,6 +29873,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasFieldName1) {
         output.WriteRawTag(8);
@@ -27743,6 +29906,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasFieldName1) {
@@ -27770,6 +29934,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestJsonName other) {
       if (other == null) {
         return;
@@ -27796,6 +29961,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -27837,6 +30003,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -27886,19 +30053,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::ExtensionSet<TestHugeFieldNumbers> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestHugeFieldNumbers> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[63]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestHugeFieldNumbers() {
       OnConstruction();
     }
@@ -27906,6 +30077,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestHugeFieldNumbers(TestHugeFieldNumbers other) : this() {
       _hasBits0 = other._hasBits0;
       optionalInt32_ = other.optionalInt32_;
@@ -27938,6 +30110,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestHugeFieldNumbers Clone() {
       return new TestHugeFieldNumbers(this);
     }
@@ -27948,6 +30121,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int optionalInt32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalInt32 {
       get { if ((_hasBits0 & 1) != 0) { return optionalInt32_; } else { return OptionalInt32DefaultValue; } }
       set {
@@ -27957,11 +30131,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_int32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalInt32 {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "optional_int32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalInt32() {
       _hasBits0 &= ~1;
     }
@@ -27972,6 +30148,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int fixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Fixed32 {
       get { if ((_hasBits0 & 2) != 0) { return fixed32_; } else { return Fixed32DefaultValue; } }
       set {
@@ -27981,11 +30158,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "fixed_32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFixed32 {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "fixed_32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFixed32() {
       _hasBits0 &= ~2;
     }
@@ -27996,6 +30175,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForInt32(4294960016);
     private readonly pbc::RepeatedField<int> repeatedInt32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedInt32 {
       get { return repeatedInt32_; }
     }
@@ -28006,6 +30186,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = pb::FieldCodec.ForInt32(4294960026);
     private readonly pbc::RepeatedField<int> packedInt32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedInt32 {
       get { return packedInt32_; }
     }
@@ -28016,6 +30197,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private global::Google.Protobuf.TestProtos.Proto2.ForeignEnum optionalEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ForeignEnum OptionalEnum {
       get { if ((_hasBits0 & 4) != 0) { return optionalEnum_; } else { return OptionalEnumDefaultValue; } }
       set {
@@ -28025,11 +30207,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalEnum {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "optional_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalEnum() {
       _hasBits0 &= ~4;
     }
@@ -28040,6 +30224,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private string optionalString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalString {
       get { return optionalString_ ?? OptionalStringDefaultValue; }
       set {
@@ -28048,11 +30233,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalString {
       get { return optionalString_ != null; }
     }
     /// <summary>Clears the value of the "optional_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalString() {
       optionalString_ = null;
     }
@@ -28063,6 +30250,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private pb::ByteString optionalBytes_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OptionalBytes {
       get { return optionalBytes_ ?? OptionalBytesDefaultValue; }
       set {
@@ -28071,11 +30259,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "optional_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalBytes {
       get { return optionalBytes_ != null; }
     }
     /// <summary>Clears the value of the "optional_bytes" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalBytes() {
       optionalBytes_ = null;
     }
@@ -28084,6 +30274,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalMessageFieldNumber = 536870007;
     private global::Google.Protobuf.TestProtos.Proto2.ForeignMessage optionalMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.ForeignMessage OptionalMessage {
       get { return optionalMessage_; }
       set {
@@ -28095,6 +30286,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     public const int OptionalGroupFieldNumber = 536870008;
     private global::Google.Protobuf.TestProtos.Proto2.TestHugeFieldNumbers.Types.OptionalGroup optionalGroup_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestHugeFieldNumbers.Types.OptionalGroup OptionalGroup {
       get { return optionalGroup_; }
       set {
@@ -28103,11 +30295,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the optionalgroup field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalGroup {
       get { return optionalGroup_ != null; }
     }
     /// <summary>Clears the value of the optionalgroup field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalGroup() {
       optionalGroup_ = null;
     }
@@ -28118,6 +30312,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         = new pbc::MapField<string, string>.Codec(pb::FieldCodec.ForString(10, ""), pb::FieldCodec.ForString(18, ""), 4294960082);
     private readonly pbc::MapField<string, string> stringStringMap_ = new pbc::MapField<string, string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, string> StringStringMap {
       get { return stringStringMap_; }
     }
@@ -28125,6 +30320,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "oneof_uint32" field.</summary>
     public const int OneofUint32FieldNumber = 536870011;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OneofUint32 {
       get { return HasOneofUint32 ? (uint) oneofField_ : 0; }
       set {
@@ -28134,11 +30330,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "oneof_uint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofUint32 {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofUint32; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_uint32" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofUint32() {
       if (HasOneofUint32) {
         ClearOneofField();
@@ -28148,6 +30346,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "oneof_test_all_types" field.</summary>
     public const int OneofTestAllTypesFieldNumber = 536870012;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.Proto2.TestAllTypes OneofTestAllTypes {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofTestAllTypes ? (global::Google.Protobuf.TestProtos.Proto2.TestAllTypes) oneofField_ : null; }
       set {
@@ -28159,6 +30358,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "oneof_string" field.</summary>
     public const int OneofStringFieldNumber = 536870013;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OneofString {
       get { return HasOneofString ? (string) oneofField_ : ""; }
       set {
@@ -28168,11 +30368,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "oneof_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofString {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofString; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_string" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofString() {
       if (HasOneofString) {
         ClearOneofField();
@@ -28182,6 +30384,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     /// <summary>Field number for the "oneof_bytes" field.</summary>
     public const int OneofBytesFieldNumber = 536870014;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OneofBytes {
       get { return HasOneofBytes ? (pb::ByteString) oneofField_ : pb::ByteString.Empty; }
       set {
@@ -28191,11 +30394,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "oneof_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofBytes {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofBytes; }
     }
     /// <summary> Clears the value of the oneof if it's currently set to "oneof_bytes" </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofBytes() {
       if (HasOneofBytes) {
         ClearOneofField();
@@ -28213,22 +30418,26 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     private OneofFieldOneofCase oneofFieldCase_ = OneofFieldOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofFieldOneofCase OneofFieldCase {
       get { return oneofFieldCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofField() {
       oneofFieldCase_ = OneofFieldOneofCase.None;
       oneofField_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestHugeFieldNumbers);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestHugeFieldNumbers other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -28258,6 +30467,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasOptionalInt32) hash ^= OptionalInt32.GetHashCode();
@@ -28285,11 +30495,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -28353,6 +30565,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasOptionalInt32) {
         output.WriteRawTag(128, 199, 255, 255, 15);
@@ -28412,6 +30625,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasOptionalInt32) {
@@ -28460,6 +30674,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestHugeFieldNumbers other) {
       if (other == null) {
         return;
@@ -28517,6 +30732,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -28605,6 +30821,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -28713,6 +30930,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #region Nested types
     /// <summary>Container for nested types declared in the TestHugeFieldNumbers message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class OptionalGroup : pb::IMessage<OptionalGroup>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -28723,19 +30941,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<OptionalGroup> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.Proto2.TestHugeFieldNumbers.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup() {
           OnConstruction();
         }
@@ -28743,6 +30965,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup(OptionalGroup other) : this() {
           _hasBits0 = other._hasBits0;
           groupA_ = other.groupA_;
@@ -28750,6 +30973,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public OptionalGroup Clone() {
           return new OptionalGroup(this);
         }
@@ -28760,6 +30984,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         private int groupA_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int GroupA {
           get { if ((_hasBits0 & 1) != 0) { return groupA_; } else { return GroupADefaultValue; } }
           set {
@@ -28769,21 +30994,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
         /// <summary>Gets whether the "group_a" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasGroupA {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "group_a" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearGroupA() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as OptionalGroup);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(OptionalGroup other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -28796,6 +31025,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasGroupA) hash ^= GroupA.GetHashCode();
@@ -28806,11 +31036,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -28827,6 +31059,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasGroupA) {
             output.WriteRawTag(200, 199, 255, 255, 15);
@@ -28839,6 +31072,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasGroupA) {
@@ -28851,6 +31085,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(OptionalGroup other) {
           if (other == null) {
             return;
@@ -28862,6 +31097,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -28885,6 +31121,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -28921,19 +31158,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::ExtensionSet<TestExtensionInsideTable> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestExtensionInsideTable> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestReflection.Descriptor.MessageTypes[64]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtensionInsideTable() {
       OnConstruction();
     }
@@ -28941,6 +31182,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtensionInsideTable(TestExtensionInsideTable other) : this() {
       _hasBits0 = other._hasBits0;
       field1_ = other.field1_;
@@ -28957,6 +31199,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestExtensionInsideTable Clone() {
       return new TestExtensionInsideTable(this);
     }
@@ -28967,6 +31210,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int field1_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field1 {
       get { if ((_hasBits0 & 1) != 0) { return field1_; } else { return Field1DefaultValue; } }
       set {
@@ -28976,11 +31220,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field1" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField1 {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "field1" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField1() {
       _hasBits0 &= ~1;
     }
@@ -28991,6 +31237,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int field2_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field2 {
       get { if ((_hasBits0 & 2) != 0) { return field2_; } else { return Field2DefaultValue; } }
       set {
@@ -29000,11 +31247,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field2" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField2 {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "field2" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField2() {
       _hasBits0 &= ~2;
     }
@@ -29015,6 +31264,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int field3_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field3 {
       get { if ((_hasBits0 & 4) != 0) { return field3_; } else { return Field3DefaultValue; } }
       set {
@@ -29024,11 +31274,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field3" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField3 {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "field3" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField3() {
       _hasBits0 &= ~4;
     }
@@ -29039,6 +31291,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int field4_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field4 {
       get { if ((_hasBits0 & 8) != 0) { return field4_; } else { return Field4DefaultValue; } }
       set {
@@ -29048,11 +31301,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field4" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField4 {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "field4" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField4() {
       _hasBits0 &= ~8;
     }
@@ -29063,6 +31318,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int field6_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field6 {
       get { if ((_hasBits0 & 16) != 0) { return field6_; } else { return Field6DefaultValue; } }
       set {
@@ -29072,11 +31328,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field6" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField6 {
       get { return (_hasBits0 & 16) != 0; }
     }
     /// <summary>Clears the value of the "field6" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField6() {
       _hasBits0 &= ~16;
     }
@@ -29087,6 +31345,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int field7_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field7 {
       get { if ((_hasBits0 & 32) != 0) { return field7_; } else { return Field7DefaultValue; } }
       set {
@@ -29096,11 +31355,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field7" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField7 {
       get { return (_hasBits0 & 32) != 0; }
     }
     /// <summary>Clears the value of the "field7" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField7() {
       _hasBits0 &= ~32;
     }
@@ -29111,6 +31372,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int field8_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field8 {
       get { if ((_hasBits0 & 64) != 0) { return field8_; } else { return Field8DefaultValue; } }
       set {
@@ -29120,11 +31382,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field8" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField8 {
       get { return (_hasBits0 & 64) != 0; }
     }
     /// <summary>Clears the value of the "field8" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField8() {
       _hasBits0 &= ~64;
     }
@@ -29135,6 +31399,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int field9_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field9 {
       get { if ((_hasBits0 & 128) != 0) { return field9_; } else { return Field9DefaultValue; } }
       set {
@@ -29144,11 +31409,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field9" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField9 {
       get { return (_hasBits0 & 128) != 0; }
     }
     /// <summary>Clears the value of the "field9" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField9() {
       _hasBits0 &= ~128;
     }
@@ -29159,6 +31426,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int field10_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Field10 {
       get { if ((_hasBits0 & 256) != 0) { return field10_; } else { return Field10DefaultValue; } }
       set {
@@ -29168,21 +31436,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "field10" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasField10 {
       get { return (_hasBits0 & 256) != 0; }
     }
     /// <summary>Clears the value of the "field10" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearField10() {
       _hasBits0 &= ~256;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestExtensionInsideTable);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestExtensionInsideTable other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -29206,6 +31478,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasField1) hash ^= Field1.GetHashCode();
@@ -29227,11 +31500,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -29283,6 +31558,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasField1) {
         output.WriteRawTag(8);
@@ -29330,6 +31606,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasField1) {
@@ -29369,6 +31646,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestExtensionInsideTable other) {
       if (other == null) {
         return;
@@ -29405,6 +31683,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -29460,6 +31739,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestCustomOptionsProto3.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestCustomOptionsProto3.cs
index 84a4a7eda2..305dfe188e 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestCustomOptionsProto3.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestCustomOptionsProto3.cs
@@ -265,19 +265,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<TestMessageWithCustomOptions> _parser = new pb::MessageParser<TestMessageWithCustomOptions>(() => new TestMessageWithCustomOptions());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestMessageWithCustomOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMessageWithCustomOptions() {
       OnConstruction();
     }
@@ -285,6 +289,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMessageWithCustomOptions(TestMessageWithCustomOptions other) : this() {
       field1_ = other.field1_;
       switch (other.AnOneofCase) {
@@ -297,6 +302,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMessageWithCustomOptions Clone() {
       return new TestMessageWithCustomOptions(this);
     }
@@ -305,6 +311,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int Field1FieldNumber = 1;
     private string field1_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Field1 {
       get { return field1_; }
       set {
@@ -315,6 +322,7 @@ namespace UnitTest.Issues.TestProtos {
     /// <summary>Field number for the "oneof_field" field.</summary>
     public const int OneofFieldFieldNumber = 2;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OneofField {
       get { return anOneofCase_ == AnOneofOneofCase.OneofField ? (int) anOneof_ : 0; }
       set {
@@ -331,22 +339,26 @@ namespace UnitTest.Issues.TestProtos {
     }
     private AnOneofOneofCase anOneofCase_ = AnOneofOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public AnOneofOneofCase AnOneofCase {
       get { return anOneofCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearAnOneof() {
       anOneofCase_ = AnOneofOneofCase.None;
       anOneof_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestMessageWithCustomOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestMessageWithCustomOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -361,6 +373,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Field1.Length != 0) hash ^= Field1.GetHashCode();
@@ -373,11 +386,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -398,6 +413,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Field1.Length != 0) {
         output.WriteRawTag(10);
@@ -414,6 +430,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Field1.Length != 0) {
@@ -429,6 +446,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestMessageWithCustomOptions other) {
       if (other == null) {
         return;
@@ -446,6 +464,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -471,6 +490,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -494,6 +514,7 @@ namespace UnitTest.Issues.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the TestMessageWithCustomOptions message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum AnEnum {
         [pbr::OriginalName("ANENUM_UNSPECIFIED")] Unspecified = 0,
@@ -518,19 +539,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<CustomOptionFooRequest> _parser = new pb::MessageParser<CustomOptionFooRequest>(() => new CustomOptionFooRequest());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<CustomOptionFooRequest> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooRequest() {
       OnConstruction();
     }
@@ -538,21 +563,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooRequest(CustomOptionFooRequest other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooRequest Clone() {
       return new CustomOptionFooRequest(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as CustomOptionFooRequest);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(CustomOptionFooRequest other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -564,6 +593,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -573,11 +603,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -590,6 +622,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -598,6 +631,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -607,6 +641,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(CustomOptionFooRequest other) {
       if (other == null) {
         return;
@@ -615,6 +650,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -632,6 +668,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -654,19 +691,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<CustomOptionFooResponse> _parser = new pb::MessageParser<CustomOptionFooResponse>(() => new CustomOptionFooResponse());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<CustomOptionFooResponse> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooResponse() {
       OnConstruction();
     }
@@ -674,21 +715,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooResponse(CustomOptionFooResponse other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooResponse Clone() {
       return new CustomOptionFooResponse(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as CustomOptionFooResponse);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(CustomOptionFooResponse other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -700,6 +745,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -709,11 +755,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -726,6 +774,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -734,6 +783,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -743,6 +793,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(CustomOptionFooResponse other) {
       if (other == null) {
         return;
@@ -751,6 +802,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -768,6 +820,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -790,19 +843,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<CustomOptionFooClientMessage> _parser = new pb::MessageParser<CustomOptionFooClientMessage>(() => new CustomOptionFooClientMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<CustomOptionFooClientMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[3]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooClientMessage() {
       OnConstruction();
     }
@@ -810,21 +867,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooClientMessage(CustomOptionFooClientMessage other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooClientMessage Clone() {
       return new CustomOptionFooClientMessage(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as CustomOptionFooClientMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(CustomOptionFooClientMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -836,6 +897,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -845,11 +907,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -862,6 +926,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -870,6 +935,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -879,6 +945,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(CustomOptionFooClientMessage other) {
       if (other == null) {
         return;
@@ -887,6 +954,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -904,6 +972,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -926,19 +995,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<CustomOptionFooServerMessage> _parser = new pb::MessageParser<CustomOptionFooServerMessage>(() => new CustomOptionFooServerMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<CustomOptionFooServerMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[4]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooServerMessage() {
       OnConstruction();
     }
@@ -946,21 +1019,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooServerMessage(CustomOptionFooServerMessage other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionFooServerMessage Clone() {
       return new CustomOptionFooServerMessage(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as CustomOptionFooServerMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(CustomOptionFooServerMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -972,6 +1049,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -981,11 +1059,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -998,6 +1078,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -1006,6 +1087,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -1015,6 +1097,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(CustomOptionFooServerMessage other) {
       if (other == null) {
         return;
@@ -1023,6 +1106,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1040,6 +1124,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1062,19 +1147,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<DummyMessageContainingEnum> _parser = new pb::MessageParser<DummyMessageContainingEnum>(() => new DummyMessageContainingEnum());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<DummyMessageContainingEnum> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[5]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DummyMessageContainingEnum() {
       OnConstruction();
     }
@@ -1082,21 +1171,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DummyMessageContainingEnum(DummyMessageContainingEnum other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DummyMessageContainingEnum Clone() {
       return new DummyMessageContainingEnum(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as DummyMessageContainingEnum);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(DummyMessageContainingEnum other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1108,6 +1201,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -1117,11 +1211,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1134,6 +1230,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -1142,6 +1239,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -1151,6 +1249,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(DummyMessageContainingEnum other) {
       if (other == null) {
         return;
@@ -1159,6 +1258,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1176,6 +1276,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1191,6 +1292,7 @@ namespace UnitTest.Issues.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the DummyMessageContainingEnum message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum TestEnumType {
         [pbr::OriginalName("TEST_OPTION_ENUM_UNSPECIFIED")] TestOptionEnumUnspecified = 0,
@@ -1211,19 +1313,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<DummyMessageInvalidAsOptionType> _parser = new pb::MessageParser<DummyMessageInvalidAsOptionType>(() => new DummyMessageInvalidAsOptionType());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<DummyMessageInvalidAsOptionType> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[6]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DummyMessageInvalidAsOptionType() {
       OnConstruction();
     }
@@ -1231,21 +1337,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DummyMessageInvalidAsOptionType(DummyMessageInvalidAsOptionType other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DummyMessageInvalidAsOptionType Clone() {
       return new DummyMessageInvalidAsOptionType(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as DummyMessageInvalidAsOptionType);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(DummyMessageInvalidAsOptionType other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1257,6 +1367,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -1266,11 +1377,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1283,6 +1396,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -1291,6 +1405,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -1300,6 +1415,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(DummyMessageInvalidAsOptionType other) {
       if (other == null) {
         return;
@@ -1308,6 +1424,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1325,6 +1442,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1347,19 +1465,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<CustomOptionMinIntegerValues> _parser = new pb::MessageParser<CustomOptionMinIntegerValues>(() => new CustomOptionMinIntegerValues());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<CustomOptionMinIntegerValues> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[7]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionMinIntegerValues() {
       OnConstruction();
     }
@@ -1367,21 +1489,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionMinIntegerValues(CustomOptionMinIntegerValues other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionMinIntegerValues Clone() {
       return new CustomOptionMinIntegerValues(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as CustomOptionMinIntegerValues);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(CustomOptionMinIntegerValues other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1393,6 +1519,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -1402,11 +1529,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1419,6 +1548,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -1427,6 +1557,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -1436,6 +1567,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(CustomOptionMinIntegerValues other) {
       if (other == null) {
         return;
@@ -1444,6 +1576,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1461,6 +1594,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1483,19 +1617,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<CustomOptionMaxIntegerValues> _parser = new pb::MessageParser<CustomOptionMaxIntegerValues>(() => new CustomOptionMaxIntegerValues());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<CustomOptionMaxIntegerValues> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[8]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionMaxIntegerValues() {
       OnConstruction();
     }
@@ -1503,21 +1641,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionMaxIntegerValues(CustomOptionMaxIntegerValues other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionMaxIntegerValues Clone() {
       return new CustomOptionMaxIntegerValues(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as CustomOptionMaxIntegerValues);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(CustomOptionMaxIntegerValues other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1529,6 +1671,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -1538,11 +1681,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1555,6 +1700,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -1563,6 +1709,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -1572,6 +1719,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(CustomOptionMaxIntegerValues other) {
       if (other == null) {
         return;
@@ -1580,6 +1728,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1597,6 +1746,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1619,19 +1769,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<CustomOptionOtherValues> _parser = new pb::MessageParser<CustomOptionOtherValues>(() => new CustomOptionOtherValues());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<CustomOptionOtherValues> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[9]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionOtherValues() {
       OnConstruction();
     }
@@ -1639,21 +1793,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionOtherValues(CustomOptionOtherValues other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CustomOptionOtherValues Clone() {
       return new CustomOptionOtherValues(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as CustomOptionOtherValues);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(CustomOptionOtherValues other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1665,6 +1823,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -1674,11 +1833,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1691,6 +1852,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -1699,6 +1861,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -1708,6 +1871,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(CustomOptionOtherValues other) {
       if (other == null) {
         return;
@@ -1716,6 +1880,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1733,6 +1898,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1755,19 +1921,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<SettingRealsFromPositiveInts> _parser = new pb::MessageParser<SettingRealsFromPositiveInts>(() => new SettingRealsFromPositiveInts());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<SettingRealsFromPositiveInts> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[10]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SettingRealsFromPositiveInts() {
       OnConstruction();
     }
@@ -1775,21 +1945,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SettingRealsFromPositiveInts(SettingRealsFromPositiveInts other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SettingRealsFromPositiveInts Clone() {
       return new SettingRealsFromPositiveInts(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as SettingRealsFromPositiveInts);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(SettingRealsFromPositiveInts other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1801,6 +1975,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -1810,11 +1985,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1827,6 +2004,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -1835,6 +2013,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -1844,6 +2023,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(SettingRealsFromPositiveInts other) {
       if (other == null) {
         return;
@@ -1852,6 +2032,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1869,6 +2050,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1891,19 +2073,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<SettingRealsFromNegativeInts> _parser = new pb::MessageParser<SettingRealsFromNegativeInts>(() => new SettingRealsFromNegativeInts());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<SettingRealsFromNegativeInts> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[11]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SettingRealsFromNegativeInts() {
       OnConstruction();
     }
@@ -1911,21 +2097,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SettingRealsFromNegativeInts(SettingRealsFromNegativeInts other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SettingRealsFromNegativeInts Clone() {
       return new SettingRealsFromNegativeInts(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as SettingRealsFromNegativeInts);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(SettingRealsFromNegativeInts other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1937,6 +2127,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -1946,11 +2137,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1963,6 +2156,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -1971,6 +2165,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -1980,6 +2175,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(SettingRealsFromNegativeInts other) {
       if (other == null) {
         return;
@@ -1988,6 +2184,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2005,6 +2202,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2027,19 +2225,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<ComplexOptionType1> _parser = new pb::MessageParser<ComplexOptionType1>(() => new ComplexOptionType1());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ComplexOptionType1> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[12]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ComplexOptionType1() {
       OnConstruction();
     }
@@ -2047,6 +2249,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ComplexOptionType1(ComplexOptionType1 other) : this() {
       foo_ = other.foo_;
       foo2_ = other.foo2_;
@@ -2056,6 +2259,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ComplexOptionType1 Clone() {
       return new ComplexOptionType1(this);
     }
@@ -2064,6 +2268,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int FooFieldNumber = 1;
     private int foo_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Foo {
       get { return foo_; }
       set {
@@ -2075,6 +2280,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int Foo2FieldNumber = 2;
     private int foo2_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Foo2 {
       get { return foo2_; }
       set {
@@ -2086,6 +2292,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int Foo3FieldNumber = 3;
     private int foo3_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Foo3 {
       get { return foo3_; }
       set {
@@ -2099,16 +2306,19 @@ namespace UnitTest.Issues.TestProtos {
         = pb::FieldCodec.ForInt32(34);
     private readonly pbc::RepeatedField<int> foo4_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> Foo4 {
       get { return foo4_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ComplexOptionType1);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ComplexOptionType1 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2124,6 +2334,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Foo != 0) hash ^= Foo.GetHashCode();
@@ -2137,11 +2348,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2167,6 +2380,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Foo != 0) {
         output.WriteRawTag(8);
@@ -2188,6 +2402,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Foo != 0) {
@@ -2207,6 +2422,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ComplexOptionType1 other) {
       if (other == null) {
         return;
@@ -2225,6 +2441,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2259,6 +2476,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2298,19 +2516,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<ComplexOptionType2> _parser = new pb::MessageParser<ComplexOptionType2>(() => new ComplexOptionType2());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ComplexOptionType2> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[13]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ComplexOptionType2() {
       OnConstruction();
     }
@@ -2318,6 +2540,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ComplexOptionType2(ComplexOptionType2 other) : this() {
       bar_ = other.bar_ != null ? other.bar_.Clone() : null;
       baz_ = other.baz_;
@@ -2327,6 +2550,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ComplexOptionType2 Clone() {
       return new ComplexOptionType2(this);
     }
@@ -2335,6 +2559,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int BarFieldNumber = 1;
     private global::UnitTest.Issues.TestProtos.ComplexOptionType1 bar_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::UnitTest.Issues.TestProtos.ComplexOptionType1 Bar {
       get { return bar_; }
       set {
@@ -2346,6 +2571,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int BazFieldNumber = 2;
     private int baz_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Baz {
       get { return baz_; }
       set {
@@ -2357,6 +2583,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int FredFieldNumber = 3;
     private global::UnitTest.Issues.TestProtos.ComplexOptionType2.Types.ComplexOptionType4 fred_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::UnitTest.Issues.TestProtos.ComplexOptionType2.Types.ComplexOptionType4 Fred {
       get { return fred_; }
       set {
@@ -2370,16 +2597,19 @@ namespace UnitTest.Issues.TestProtos {
         = pb::FieldCodec.ForMessage(34, global::UnitTest.Issues.TestProtos.ComplexOptionType2.Types.ComplexOptionType4.Parser);
     private readonly pbc::RepeatedField<global::UnitTest.Issues.TestProtos.ComplexOptionType2.Types.ComplexOptionType4> barney_ = new pbc::RepeatedField<global::UnitTest.Issues.TestProtos.ComplexOptionType2.Types.ComplexOptionType4>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::UnitTest.Issues.TestProtos.ComplexOptionType2.Types.ComplexOptionType4> Barney {
       get { return barney_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ComplexOptionType2);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ComplexOptionType2 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2395,6 +2625,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (bar_ != null) hash ^= Bar.GetHashCode();
@@ -2408,11 +2639,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2438,6 +2671,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (bar_ != null) {
         output.WriteRawTag(10);
@@ -2459,6 +2693,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (bar_ != null) {
@@ -2478,6 +2713,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ComplexOptionType2 other) {
       if (other == null) {
         return;
@@ -2502,6 +2738,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2541,6 +2778,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2578,6 +2816,7 @@ namespace UnitTest.Issues.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the ComplexOptionType2 message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class ComplexOptionType4 : pb::IMessage<ComplexOptionType4>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -2587,19 +2826,23 @@ namespace UnitTest.Issues.TestProtos {
         private static readonly pb::MessageParser<ComplexOptionType4> _parser = new pb::MessageParser<ComplexOptionType4>(() => new ComplexOptionType4());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<ComplexOptionType4> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::UnitTest.Issues.TestProtos.ComplexOptionType2.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public ComplexOptionType4() {
           OnConstruction();
         }
@@ -2607,12 +2850,14 @@ namespace UnitTest.Issues.TestProtos {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public ComplexOptionType4(ComplexOptionType4 other) : this() {
           waldo_ = other.waldo_;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public ComplexOptionType4 Clone() {
           return new ComplexOptionType4(this);
         }
@@ -2621,6 +2866,7 @@ namespace UnitTest.Issues.TestProtos {
         public const int WaldoFieldNumber = 1;
         private int waldo_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Waldo {
           get { return waldo_; }
           set {
@@ -2629,11 +2875,13 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as ComplexOptionType4);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(ComplexOptionType4 other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -2646,6 +2894,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (Waldo != 0) hash ^= Waldo.GetHashCode();
@@ -2656,11 +2905,13 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -2677,6 +2928,7 @@ namespace UnitTest.Issues.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (Waldo != 0) {
             output.WriteRawTag(8);
@@ -2689,6 +2941,7 @@ namespace UnitTest.Issues.TestProtos {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (Waldo != 0) {
@@ -2701,6 +2954,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(ComplexOptionType4 other) {
           if (other == null) {
             return;
@@ -2712,6 +2966,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -2733,6 +2988,7 @@ namespace UnitTest.Issues.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -2752,6 +3008,7 @@ namespace UnitTest.Issues.TestProtos {
         #region Extensions
         /// <summary>Container for extensions for other messages declared in the ComplexOptionType4 message type.</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static partial class Extensions {
           public static readonly pb::Extension<global::Google.Protobuf.Reflection.MessageOptions, global::UnitTest.Issues.TestProtos.ComplexOptionType2.Types.ComplexOptionType4> ComplexOpt4 =
             new pb::Extension<global::Google.Protobuf.Reflection.MessageOptions, global::UnitTest.Issues.TestProtos.ComplexOptionType2.Types.ComplexOptionType4>(7633546, pb::FieldCodec.ForMessage(61068370, global::UnitTest.Issues.TestProtos.ComplexOptionType2.Types.ComplexOptionType4.Parser));
@@ -2773,19 +3030,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<ComplexOptionType3> _parser = new pb::MessageParser<ComplexOptionType3>(() => new ComplexOptionType3());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ComplexOptionType3> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[14]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ComplexOptionType3() {
       OnConstruction();
     }
@@ -2793,12 +3054,14 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ComplexOptionType3(ComplexOptionType3 other) : this() {
       qux_ = other.qux_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ComplexOptionType3 Clone() {
       return new ComplexOptionType3(this);
     }
@@ -2807,6 +3070,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int QuxFieldNumber = 1;
     private int qux_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Qux {
       get { return qux_; }
       set {
@@ -2815,11 +3079,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ComplexOptionType3);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ComplexOptionType3 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2832,6 +3098,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Qux != 0) hash ^= Qux.GetHashCode();
@@ -2842,11 +3109,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2863,6 +3132,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Qux != 0) {
         output.WriteRawTag(8);
@@ -2875,6 +3145,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Qux != 0) {
@@ -2887,6 +3158,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ComplexOptionType3 other) {
       if (other == null) {
         return;
@@ -2898,6 +3170,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2919,6 +3192,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2948,19 +3222,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<VariousComplexOptions> _parser = new pb::MessageParser<VariousComplexOptions>(() => new VariousComplexOptions());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<VariousComplexOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[15]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public VariousComplexOptions() {
       OnConstruction();
     }
@@ -2968,21 +3246,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public VariousComplexOptions(VariousComplexOptions other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public VariousComplexOptions Clone() {
       return new VariousComplexOptions(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as VariousComplexOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(VariousComplexOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2994,6 +3276,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -3003,11 +3286,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3020,6 +3305,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -3028,6 +3314,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -3037,6 +3324,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(VariousComplexOptions other) {
       if (other == null) {
         return;
@@ -3045,6 +3333,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3062,6 +3351,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3087,19 +3377,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<Aggregate> _parser = new pb::MessageParser<Aggregate>(() => new Aggregate());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Aggregate> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[16]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Aggregate() {
       OnConstruction();
     }
@@ -3107,6 +3401,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Aggregate(Aggregate other) : this() {
       i_ = other.i_;
       s_ = other.s_;
@@ -3115,6 +3410,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Aggregate Clone() {
       return new Aggregate(this);
     }
@@ -3123,6 +3419,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int IFieldNumber = 1;
     private int i_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int I {
       get { return i_; }
       set {
@@ -3134,6 +3431,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int SFieldNumber = 2;
     private string s_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string S {
       get { return s_; }
       set {
@@ -3148,6 +3446,7 @@ namespace UnitTest.Issues.TestProtos {
     /// A nested object
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::UnitTest.Issues.TestProtos.Aggregate Sub {
       get { return sub_; }
       set {
@@ -3156,11 +3455,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Aggregate);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Aggregate other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3175,6 +3476,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (I != 0) hash ^= I.GetHashCode();
@@ -3187,11 +3489,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3216,6 +3520,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (I != 0) {
         output.WriteRawTag(8);
@@ -3236,6 +3541,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (I != 0) {
@@ -3254,6 +3560,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Aggregate other) {
       if (other == null) {
         return;
@@ -3274,6 +3581,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3306,6 +3614,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3343,19 +3652,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<AggregateMessage> _parser = new pb::MessageParser<AggregateMessage>(() => new AggregateMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<AggregateMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[17]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public AggregateMessage() {
       OnConstruction();
     }
@@ -3363,12 +3676,14 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public AggregateMessage(AggregateMessage other) : this() {
       fieldname_ = other.fieldname_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public AggregateMessage Clone() {
       return new AggregateMessage(this);
     }
@@ -3377,6 +3692,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int FieldnameFieldNumber = 1;
     private int fieldname_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Fieldname {
       get { return fieldname_; }
       set {
@@ -3385,11 +3701,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as AggregateMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(AggregateMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3402,6 +3720,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Fieldname != 0) hash ^= Fieldname.GetHashCode();
@@ -3412,11 +3731,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3433,6 +3754,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Fieldname != 0) {
         output.WriteRawTag(8);
@@ -3445,6 +3767,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Fieldname != 0) {
@@ -3457,6 +3780,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(AggregateMessage other) {
       if (other == null) {
         return;
@@ -3468,6 +3792,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3489,6 +3814,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3518,19 +3844,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<NestedOptionType> _parser = new pb::MessageParser<NestedOptionType>(() => new NestedOptionType());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<NestedOptionType> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Reflection.Descriptor.MessageTypes[18]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NestedOptionType() {
       OnConstruction();
     }
@@ -3538,21 +3868,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NestedOptionType(NestedOptionType other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NestedOptionType Clone() {
       return new NestedOptionType(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as NestedOptionType);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(NestedOptionType other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3564,6 +3898,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -3573,11 +3908,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3590,6 +3927,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -3598,6 +3936,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -3607,6 +3946,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(NestedOptionType other) {
       if (other == null) {
         return;
@@ -3615,6 +3955,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3632,6 +3973,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3647,6 +3989,7 @@ namespace UnitTest.Issues.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the NestedOptionType message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum NestedEnum {
         [pbr::OriginalName("UNSPECIFIED")] Unspecified = 0,
@@ -3661,19 +4004,23 @@ namespace UnitTest.Issues.TestProtos {
         private static readonly pb::MessageParser<NestedMessage> _parser = new pb::MessageParser<NestedMessage>(() => new NestedMessage());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::UnitTest.Issues.TestProtos.NestedOptionType.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -3681,12 +4028,14 @@ namespace UnitTest.Issues.TestProtos {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           nestedField_ = other.nestedField_;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -3695,6 +4044,7 @@ namespace UnitTest.Issues.TestProtos {
         public const int NestedFieldFieldNumber = 1;
         private int nestedField_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int NestedField {
           get { return nestedField_; }
           set {
@@ -3703,11 +4053,13 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -3720,6 +4072,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (NestedField != 0) hash ^= NestedField.GetHashCode();
@@ -3730,11 +4083,13 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -3751,6 +4106,7 @@ namespace UnitTest.Issues.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (NestedField != 0) {
             output.WriteRawTag(8);
@@ -3763,6 +4119,7 @@ namespace UnitTest.Issues.TestProtos {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (NestedField != 0) {
@@ -3775,6 +4132,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -3786,6 +4144,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -3807,6 +4166,7 @@ namespace UnitTest.Issues.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImport.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImport.cs
index 14b054ccbb..4f40564ebd 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImport.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImport.cs
@@ -68,19 +68,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ImportMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestImportReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ImportMessage() {
       OnConstruction();
     }
@@ -88,6 +92,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ImportMessage(ImportMessage other) : this() {
       _hasBits0 = other._hasBits0;
       d_ = other.d_;
@@ -95,6 +100,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ImportMessage Clone() {
       return new ImportMessage(this);
     }
@@ -105,6 +111,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int d_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int D {
       get { if ((_hasBits0 & 1) != 0) { return d_; } else { return DDefaultValue; } }
       set {
@@ -114,21 +121,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "d" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasD {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "d" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearD() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ImportMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ImportMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -141,6 +152,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasD) hash ^= D.GetHashCode();
@@ -151,11 +163,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -172,6 +186,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasD) {
         output.WriteRawTag(8);
@@ -184,6 +199,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasD) {
@@ -196,6 +212,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ImportMessage other) {
       if (other == null) {
         return;
@@ -207,6 +224,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -228,6 +246,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportProto3.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportProto3.cs
index ecdf40979c..a3ce7a2259 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportProto3.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportProto3.cs
@@ -58,19 +58,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<ImportMessage> _parser = new pb::MessageParser<ImportMessage>(() => new ImportMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ImportMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestImportProto3Reflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ImportMessage() {
       OnConstruction();
     }
@@ -78,12 +82,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ImportMessage(ImportMessage other) : this() {
       d_ = other.d_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ImportMessage Clone() {
       return new ImportMessage(this);
     }
@@ -92,6 +98,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DFieldNumber = 1;
     private int d_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int D {
       get { return d_; }
       set {
@@ -100,11 +107,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ImportMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ImportMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -117,6 +126,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (D != 0) hash ^= D.GetHashCode();
@@ -127,11 +137,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -148,6 +160,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (D != 0) {
         output.WriteRawTag(8);
@@ -160,6 +173,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (D != 0) {
@@ -172,6 +186,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ImportMessage other) {
       if (other == null) {
         return;
@@ -183,6 +198,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -204,6 +220,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportPublic.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportPublic.cs
index 24c29e9708..b1e0f30adb 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportPublic.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportPublic.cs
@@ -46,19 +46,23 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<PublicImportMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.Proto2.UnittestImportPublicReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public PublicImportMessage() {
       OnConstruction();
     }
@@ -66,6 +70,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public PublicImportMessage(PublicImportMessage other) : this() {
       _hasBits0 = other._hasBits0;
       e_ = other.e_;
@@ -73,6 +78,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public PublicImportMessage Clone() {
       return new PublicImportMessage(this);
     }
@@ -83,6 +89,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     private int e_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int E {
       get { if ((_hasBits0 & 1) != 0) { return e_; } else { return EDefaultValue; } }
       set {
@@ -92,21 +99,25 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
     /// <summary>Gets whether the "e" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasE {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "e" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearE() {
       _hasBits0 &= ~1;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as PublicImportMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(PublicImportMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -119,6 +130,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasE) hash ^= E.GetHashCode();
@@ -129,11 +141,13 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -150,6 +164,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasE) {
         output.WriteRawTag(8);
@@ -162,6 +177,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasE) {
@@ -174,6 +190,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(PublicImportMessage other) {
       if (other == null) {
         return;
@@ -185,6 +202,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -206,6 +224,7 @@ namespace Google.Protobuf.TestProtos.Proto2 {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportPublicProto3.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportPublicProto3.cs
index 2d77a639fa..dde8b9bda1 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportPublicProto3.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestImportPublicProto3.cs
@@ -46,19 +46,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<PublicImportMessage> _parser = new pb::MessageParser<PublicImportMessage>(() => new PublicImportMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<PublicImportMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestImportPublicProto3Reflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public PublicImportMessage() {
       OnConstruction();
     }
@@ -66,12 +70,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public PublicImportMessage(PublicImportMessage other) : this() {
       e_ = other.e_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public PublicImportMessage Clone() {
       return new PublicImportMessage(this);
     }
@@ -80,6 +86,7 @@ namespace Google.Protobuf.TestProtos {
     public const int EFieldNumber = 1;
     private int e_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int E {
       get { return e_; }
       set {
@@ -88,11 +95,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as PublicImportMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(PublicImportMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -105,6 +114,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (E != 0) hash ^= E.GetHashCode();
@@ -115,11 +125,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -136,6 +148,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (E != 0) {
         output.WriteRawTag(8);
@@ -148,6 +161,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (E != 0) {
@@ -160,6 +174,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(PublicImportMessage other) {
       if (other == null) {
         return;
@@ -171,6 +186,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -192,6 +208,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssue6936B.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssue6936B.cs
index e22bf0f8ff..1ac4a67299 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssue6936B.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssue6936B.cs
@@ -45,19 +45,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<Foo> _parser = new pb::MessageParser<Foo>(() => new Foo());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Foo> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssue6936BReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Foo() {
       OnConstruction();
     }
@@ -65,21 +69,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Foo(Foo other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Foo Clone() {
       return new Foo(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Foo);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Foo other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -91,6 +99,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -100,11 +109,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -117,6 +128,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -125,6 +137,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -134,6 +147,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Foo other) {
       if (other == null) {
         return;
@@ -142,6 +156,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -159,6 +174,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssue6936C.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssue6936C.cs
index 21d36300f8..d7789b87ac 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssue6936C.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssue6936C.cs
@@ -47,19 +47,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<Bar> _parser = new pb::MessageParser<Bar>(() => new Bar());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Bar> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssue6936CReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Bar() {
       OnConstruction();
     }
@@ -67,12 +71,14 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Bar(Bar other) : this() {
       foo_ = other.foo_ != null ? other.foo_.Clone() : null;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Bar Clone() {
       return new Bar(this);
     }
@@ -81,6 +87,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int FooFieldNumber = 1;
     private global::UnitTest.Issues.TestProtos.Foo foo_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::UnitTest.Issues.TestProtos.Foo Foo {
       get { return foo_; }
       set {
@@ -89,11 +96,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Bar);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Bar other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -106,6 +115,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (foo_ != null) hash ^= Foo.GetHashCode();
@@ -116,11 +126,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -137,6 +149,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (foo_ != null) {
         output.WriteRawTag(10);
@@ -149,6 +162,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (foo_ != null) {
@@ -161,6 +175,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Bar other) {
       if (other == null) {
         return;
@@ -175,6 +190,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -199,6 +215,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssues.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssues.cs
index 4377cf3a19..ec4c07b112 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssues.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestIssues.cs
@@ -106,19 +106,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<Issue307> _parser = new pb::MessageParser<Issue307>(() => new Issue307());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Issue307> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Issue307() {
       OnConstruction();
     }
@@ -126,21 +130,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Issue307(Issue307 other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Issue307 Clone() {
       return new Issue307(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Issue307);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Issue307 other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -152,6 +160,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -161,11 +170,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -178,6 +189,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -186,6 +198,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -195,6 +208,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Issue307 other) {
       if (other == null) {
         return;
@@ -203,6 +217,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -220,6 +235,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -235,6 +251,7 @@ namespace UnitTest.Issues.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the Issue307 message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class NestedOnce : pb::IMessage<NestedOnce>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -244,19 +261,23 @@ namespace UnitTest.Issues.TestProtos {
         private static readonly pb::MessageParser<NestedOnce> _parser = new pb::MessageParser<NestedOnce>(() => new NestedOnce());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedOnce> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::UnitTest.Issues.TestProtos.Issue307.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedOnce() {
           OnConstruction();
         }
@@ -264,21 +285,25 @@ namespace UnitTest.Issues.TestProtos {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedOnce(NestedOnce other) : this() {
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedOnce Clone() {
           return new NestedOnce(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedOnce);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedOnce other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -290,6 +315,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (_unknownFields != null) {
@@ -299,11 +325,13 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -316,6 +344,7 @@ namespace UnitTest.Issues.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (_unknownFields != null) {
             _unknownFields.WriteTo(ref output);
@@ -324,6 +353,7 @@ namespace UnitTest.Issues.TestProtos {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (_unknownFields != null) {
@@ -333,6 +363,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedOnce other) {
           if (other == null) {
             return;
@@ -341,6 +372,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -358,6 +390,7 @@ namespace UnitTest.Issues.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -373,6 +406,7 @@ namespace UnitTest.Issues.TestProtos {
         #region Nested types
         /// <summary>Container for nested types declared in the NestedOnce message type.</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static partial class Types {
           public sealed partial class NestedTwice : pb::IMessage<NestedTwice>
           #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -382,19 +416,23 @@ namespace UnitTest.Issues.TestProtos {
             private static readonly pb::MessageParser<NestedTwice> _parser = new pb::MessageParser<NestedTwice>(() => new NestedTwice());
             private pb::UnknownFieldSet _unknownFields;
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public static pb::MessageParser<NestedTwice> Parser { get { return _parser; } }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public static pbr::MessageDescriptor Descriptor {
               get { return global::UnitTest.Issues.TestProtos.Issue307.Types.NestedOnce.Descriptor.NestedTypes[0]; }
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             pbr::MessageDescriptor pb::IMessage.Descriptor {
               get { return Descriptor; }
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public NestedTwice() {
               OnConstruction();
             }
@@ -402,21 +440,25 @@ namespace UnitTest.Issues.TestProtos {
             partial void OnConstruction();
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public NestedTwice(NestedTwice other) : this() {
               _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public NestedTwice Clone() {
               return new NestedTwice(this);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override bool Equals(object other) {
               return Equals(other as NestedTwice);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public bool Equals(NestedTwice other) {
               if (ReferenceEquals(other, null)) {
                 return false;
@@ -428,6 +470,7 @@ namespace UnitTest.Issues.TestProtos {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override int GetHashCode() {
               int hash = 1;
               if (_unknownFields != null) {
@@ -437,11 +480,13 @@ namespace UnitTest.Issues.TestProtos {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public override string ToString() {
               return pb::JsonFormatter.ToDiagnosticString(this);
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void WriteTo(pb::CodedOutputStream output) {
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
               output.WriteRawMessage(this);
@@ -454,6 +499,7 @@ namespace UnitTest.Issues.TestProtos {
 
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
               if (_unknownFields != null) {
                 _unknownFields.WriteTo(ref output);
@@ -462,6 +508,7 @@ namespace UnitTest.Issues.TestProtos {
             #endif
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public int CalculateSize() {
               int size = 0;
               if (_unknownFields != null) {
@@ -471,6 +518,7 @@ namespace UnitTest.Issues.TestProtos {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void MergeFrom(NestedTwice other) {
               if (other == null) {
                 return;
@@ -479,6 +527,7 @@ namespace UnitTest.Issues.TestProtos {
             }
 
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             public void MergeFrom(pb::CodedInputStream input) {
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
               input.ReadRawMessage(this);
@@ -496,6 +545,7 @@ namespace UnitTest.Issues.TestProtos {
 
             #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
             [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+            [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
             void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
               uint tag;
               while ((tag = input.ReadTag()) != 0) {
@@ -528,19 +578,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<NegativeEnumMessage> _parser = new pb::MessageParser<NegativeEnumMessage>(() => new NegativeEnumMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<NegativeEnumMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NegativeEnumMessage() {
       OnConstruction();
     }
@@ -548,6 +602,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NegativeEnumMessage(NegativeEnumMessage other) : this() {
       value_ = other.value_;
       values_ = other.values_.Clone();
@@ -556,6 +611,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NegativeEnumMessage Clone() {
       return new NegativeEnumMessage(this);
     }
@@ -564,6 +620,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int ValueFieldNumber = 1;
     private global::UnitTest.Issues.TestProtos.NegativeEnum value_ = global::UnitTest.Issues.TestProtos.NegativeEnum.Zero;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::UnitTest.Issues.TestProtos.NegativeEnum Value {
       get { return value_; }
       set {
@@ -577,6 +634,7 @@ namespace UnitTest.Issues.TestProtos {
         = pb::FieldCodec.ForEnum(16, x => (int) x, x => (global::UnitTest.Issues.TestProtos.NegativeEnum) x);
     private readonly pbc::RepeatedField<global::UnitTest.Issues.TestProtos.NegativeEnum> values_ = new pbc::RepeatedField<global::UnitTest.Issues.TestProtos.NegativeEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::UnitTest.Issues.TestProtos.NegativeEnum> Values {
       get { return values_; }
     }
@@ -587,16 +645,19 @@ namespace UnitTest.Issues.TestProtos {
         = pb::FieldCodec.ForEnum(26, x => (int) x, x => (global::UnitTest.Issues.TestProtos.NegativeEnum) x);
     private readonly pbc::RepeatedField<global::UnitTest.Issues.TestProtos.NegativeEnum> packedValues_ = new pbc::RepeatedField<global::UnitTest.Issues.TestProtos.NegativeEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::UnitTest.Issues.TestProtos.NegativeEnum> PackedValues {
       get { return packedValues_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as NegativeEnumMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(NegativeEnumMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -611,6 +672,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value != global::UnitTest.Issues.TestProtos.NegativeEnum.Zero) hash ^= Value.GetHashCode();
@@ -623,11 +685,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -646,6 +710,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value != global::UnitTest.Issues.TestProtos.NegativeEnum.Zero) {
         output.WriteRawTag(8);
@@ -660,6 +725,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value != global::UnitTest.Issues.TestProtos.NegativeEnum.Zero) {
@@ -674,6 +740,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(NegativeEnumMessage other) {
       if (other == null) {
         return;
@@ -687,6 +754,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -718,6 +786,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -754,19 +823,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<DeprecatedChild> _parser = new pb::MessageParser<DeprecatedChild>(() => new DeprecatedChild());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<DeprecatedChild> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DeprecatedChild() {
       OnConstruction();
     }
@@ -774,21 +847,25 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DeprecatedChild(DeprecatedChild other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DeprecatedChild Clone() {
       return new DeprecatedChild(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as DeprecatedChild);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(DeprecatedChild other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -800,6 +877,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -809,11 +887,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -826,6 +906,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -834,6 +915,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -843,6 +925,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(DeprecatedChild other) {
       if (other == null) {
         return;
@@ -851,6 +934,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -868,6 +952,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -890,19 +975,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<DeprecatedFieldsMessage> _parser = new pb::MessageParser<DeprecatedFieldsMessage>(() => new DeprecatedFieldsMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<DeprecatedFieldsMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[3]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DeprecatedFieldsMessage() {
       OnConstruction();
     }
@@ -910,6 +999,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DeprecatedFieldsMessage(DeprecatedFieldsMessage other) : this() {
       primitiveValue_ = other.primitiveValue_;
       primitiveArray_ = other.primitiveArray_.Clone();
@@ -921,6 +1011,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DeprecatedFieldsMessage Clone() {
       return new DeprecatedFieldsMessage(this);
     }
@@ -930,6 +1021,7 @@ namespace UnitTest.Issues.TestProtos {
     private int primitiveValue_;
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int PrimitiveValue {
       get { return primitiveValue_; }
       set {
@@ -944,6 +1036,7 @@ namespace UnitTest.Issues.TestProtos {
     private readonly pbc::RepeatedField<int> primitiveArray_ = new pbc::RepeatedField<int>();
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PrimitiveArray {
       get { return primitiveArray_; }
     }
@@ -953,6 +1046,7 @@ namespace UnitTest.Issues.TestProtos {
     private global::UnitTest.Issues.TestProtos.DeprecatedChild messageValue_;
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::UnitTest.Issues.TestProtos.DeprecatedChild MessageValue {
       get { return messageValue_; }
       set {
@@ -967,6 +1061,7 @@ namespace UnitTest.Issues.TestProtos {
     private readonly pbc::RepeatedField<global::UnitTest.Issues.TestProtos.DeprecatedChild> messageArray_ = new pbc::RepeatedField<global::UnitTest.Issues.TestProtos.DeprecatedChild>();
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::UnitTest.Issues.TestProtos.DeprecatedChild> MessageArray {
       get { return messageArray_; }
     }
@@ -976,6 +1071,7 @@ namespace UnitTest.Issues.TestProtos {
     private global::UnitTest.Issues.TestProtos.DeprecatedEnum enumValue_ = global::UnitTest.Issues.TestProtos.DeprecatedEnum.DeprecatedZero;
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::UnitTest.Issues.TestProtos.DeprecatedEnum EnumValue {
       get { return enumValue_; }
       set {
@@ -990,16 +1086,19 @@ namespace UnitTest.Issues.TestProtos {
     private readonly pbc::RepeatedField<global::UnitTest.Issues.TestProtos.DeprecatedEnum> enumArray_ = new pbc::RepeatedField<global::UnitTest.Issues.TestProtos.DeprecatedEnum>();
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::UnitTest.Issues.TestProtos.DeprecatedEnum> EnumArray {
       get { return enumArray_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as DeprecatedFieldsMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(DeprecatedFieldsMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1017,6 +1116,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (PrimitiveValue != 0) hash ^= PrimitiveValue.GetHashCode();
@@ -1032,11 +1132,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1064,6 +1166,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (PrimitiveValue != 0) {
         output.WriteRawTag(8);
@@ -1087,6 +1190,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (PrimitiveValue != 0) {
@@ -1108,6 +1212,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(DeprecatedFieldsMessage other) {
       if (other == null) {
         return;
@@ -1131,6 +1236,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1177,6 +1283,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1231,19 +1338,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<ItemField> _parser = new pb::MessageParser<ItemField>(() => new ItemField());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ItemField> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[4]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ItemField() {
       OnConstruction();
     }
@@ -1251,12 +1362,14 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ItemField(ItemField other) : this() {
       item_ = other.item_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ItemField Clone() {
       return new ItemField(this);
     }
@@ -1265,6 +1378,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int ItemFieldNumber = 1;
     private int item_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Item {
       get { return item_; }
       set {
@@ -1273,11 +1387,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ItemField);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ItemField other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1290,6 +1406,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Item != 0) hash ^= Item.GetHashCode();
@@ -1300,11 +1417,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1321,6 +1440,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Item != 0) {
         output.WriteRawTag(8);
@@ -1333,6 +1453,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Item != 0) {
@@ -1345,6 +1466,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ItemField other) {
       if (other == null) {
         return;
@@ -1356,6 +1478,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1377,6 +1500,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1403,19 +1527,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<ReservedNames> _parser = new pb::MessageParser<ReservedNames>(() => new ReservedNames());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ReservedNames> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[5]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ReservedNames() {
       OnConstruction();
     }
@@ -1423,6 +1551,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ReservedNames(ReservedNames other) : this() {
       types_ = other.types_;
       descriptor_ = other.descriptor_;
@@ -1430,6 +1559,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ReservedNames Clone() {
       return new ReservedNames(this);
     }
@@ -1438,6 +1568,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int Types_FieldNumber = 1;
     private int types_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Types_ {
       get { return types_; }
       set {
@@ -1449,6 +1580,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int Descriptor_FieldNumber = 2;
     private int descriptor_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Descriptor_ {
       get { return descriptor_; }
       set {
@@ -1457,11 +1589,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ReservedNames);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ReservedNames other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1475,6 +1609,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Types_ != 0) hash ^= Types_.GetHashCode();
@@ -1486,11 +1621,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1511,6 +1648,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Types_ != 0) {
         output.WriteRawTag(8);
@@ -1527,6 +1665,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Types_ != 0) {
@@ -1542,6 +1681,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ReservedNames other) {
       if (other == null) {
         return;
@@ -1556,6 +1696,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1581,6 +1722,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1604,6 +1746,7 @@ namespace UnitTest.Issues.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the ReservedNames message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       /// <summary>
       /// Force a nested type called Types
@@ -1616,19 +1759,23 @@ namespace UnitTest.Issues.TestProtos {
         private static readonly pb::MessageParser<SomeNestedType> _parser = new pb::MessageParser<SomeNestedType>(() => new SomeNestedType());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<SomeNestedType> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::UnitTest.Issues.TestProtos.ReservedNames.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SomeNestedType() {
           OnConstruction();
         }
@@ -1636,21 +1783,25 @@ namespace UnitTest.Issues.TestProtos {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SomeNestedType(SomeNestedType other) : this() {
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public SomeNestedType Clone() {
           return new SomeNestedType(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as SomeNestedType);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(SomeNestedType other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -1662,6 +1813,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (_unknownFields != null) {
@@ -1671,11 +1823,13 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -1688,6 +1842,7 @@ namespace UnitTest.Issues.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (_unknownFields != null) {
             _unknownFields.WriteTo(ref output);
@@ -1696,6 +1851,7 @@ namespace UnitTest.Issues.TestProtos {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (_unknownFields != null) {
@@ -1705,6 +1861,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(SomeNestedType other) {
           if (other == null) {
             return;
@@ -1713,6 +1870,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -1730,6 +1888,7 @@ namespace UnitTest.Issues.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -1769,19 +1928,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<TestJsonFieldOrdering> _parser = new pb::MessageParser<TestJsonFieldOrdering>(() => new TestJsonFieldOrdering());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestJsonFieldOrdering> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[6]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestJsonFieldOrdering() {
       OnConstruction();
     }
@@ -1789,6 +1952,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestJsonFieldOrdering(TestJsonFieldOrdering other) : this() {
       plainInt32_ = other.plainInt32_;
       plainString_ = other.plainString_;
@@ -1814,6 +1978,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestJsonFieldOrdering Clone() {
       return new TestJsonFieldOrdering(this);
     }
@@ -1822,6 +1987,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int PlainInt32FieldNumber = 4;
     private int plainInt32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int PlainInt32 {
       get { return plainInt32_; }
       set {
@@ -1832,6 +1998,7 @@ namespace UnitTest.Issues.TestProtos {
     /// <summary>Field number for the "o1_string" field.</summary>
     public const int O1StringFieldNumber = 2;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string O1String {
       get { return o1Case_ == O1OneofCase.O1String ? (string) o1_ : ""; }
       set {
@@ -1843,6 +2010,7 @@ namespace UnitTest.Issues.TestProtos {
     /// <summary>Field number for the "o1_int32" field.</summary>
     public const int O1Int32FieldNumber = 5;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int O1Int32 {
       get { return o1Case_ == O1OneofCase.O1Int32 ? (int) o1_ : 0; }
       set {
@@ -1855,6 +2023,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int PlainStringFieldNumber = 1;
     private string plainString_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string PlainString {
       get { return plainString_; }
       set {
@@ -1865,6 +2034,7 @@ namespace UnitTest.Issues.TestProtos {
     /// <summary>Field number for the "o2_int32" field.</summary>
     public const int O2Int32FieldNumber = 6;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int O2Int32 {
       get { return o2Case_ == O2OneofCase.O2Int32 ? (int) o2_ : 0; }
       set {
@@ -1876,6 +2046,7 @@ namespace UnitTest.Issues.TestProtos {
     /// <summary>Field number for the "o2_string" field.</summary>
     public const int O2StringFieldNumber = 3;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string O2String {
       get { return o2Case_ == O2OneofCase.O2String ? (string) o2_ : ""; }
       set {
@@ -1893,11 +2064,13 @@ namespace UnitTest.Issues.TestProtos {
     }
     private O1OneofCase o1Case_ = O1OneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public O1OneofCase O1Case {
       get { return o1Case_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearO1() {
       o1Case_ = O1OneofCase.None;
       o1_ = null;
@@ -1912,22 +2085,26 @@ namespace UnitTest.Issues.TestProtos {
     }
     private O2OneofCase o2Case_ = O2OneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public O2OneofCase O2Case {
       get { return o2Case_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearO2() {
       o2Case_ = O2OneofCase.None;
       o2_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestJsonFieldOrdering);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestJsonFieldOrdering other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1947,6 +2124,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (PlainInt32 != 0) hash ^= PlainInt32.GetHashCode();
@@ -1964,11 +2142,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2005,6 +2185,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (PlainString.Length != 0) {
         output.WriteRawTag(10);
@@ -2037,6 +2218,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (PlainInt32 != 0) {
@@ -2064,6 +2246,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestJsonFieldOrdering other) {
       if (other == null) {
         return;
@@ -2096,6 +2279,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2137,6 +2321,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2183,19 +2368,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<TestJsonName> _parser = new pb::MessageParser<TestJsonName>(() => new TestJsonName());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestJsonName> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[7]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestJsonName() {
       OnConstruction();
     }
@@ -2203,6 +2392,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestJsonName(TestJsonName other) : this() {
       name_ = other.name_;
       description_ = other.description_;
@@ -2211,6 +2401,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestJsonName Clone() {
       return new TestJsonName(this);
     }
@@ -2222,6 +2413,7 @@ namespace UnitTest.Issues.TestProtos {
     /// Message for testing the effects for of the json_name option
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -2233,6 +2425,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int DescriptionFieldNumber = 2;
     private string description_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Description {
       get { return description_; }
       set {
@@ -2244,6 +2437,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int GuidFieldNumber = 3;
     private string guid_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Guid {
       get { return guid_; }
       set {
@@ -2252,11 +2446,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestJsonName);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestJsonName other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2271,6 +2467,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Name.Length != 0) hash ^= Name.GetHashCode();
@@ -2283,11 +2480,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2312,6 +2511,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Name.Length != 0) {
         output.WriteRawTag(10);
@@ -2332,6 +2532,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Name.Length != 0) {
@@ -2350,6 +2551,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestJsonName other) {
       if (other == null) {
         return;
@@ -2367,6 +2569,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2396,6 +2599,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2435,19 +2639,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<OneofMerging> _parser = new pb::MessageParser<OneofMerging>(() => new OneofMerging());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<OneofMerging> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[8]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofMerging() {
       OnConstruction();
     }
@@ -2455,6 +2663,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofMerging(OneofMerging other) : this() {
       switch (other.ValueCase) {
         case ValueOneofCase.Text:
@@ -2469,6 +2678,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofMerging Clone() {
       return new OneofMerging(this);
     }
@@ -2476,6 +2686,7 @@ namespace UnitTest.Issues.TestProtos {
     /// <summary>Field number for the "text" field.</summary>
     public const int TextFieldNumber = 1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Text {
       get { return valueCase_ == ValueOneofCase.Text ? (string) value_ : ""; }
       set {
@@ -2487,6 +2698,7 @@ namespace UnitTest.Issues.TestProtos {
     /// <summary>Field number for the "nested" field.</summary>
     public const int NestedFieldNumber = 2;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::UnitTest.Issues.TestProtos.OneofMerging.Types.Nested Nested {
       get { return valueCase_ == ValueOneofCase.Nested ? (global::UnitTest.Issues.TestProtos.OneofMerging.Types.Nested) value_ : null; }
       set {
@@ -2504,22 +2716,26 @@ namespace UnitTest.Issues.TestProtos {
     }
     private ValueOneofCase valueCase_ = ValueOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ValueOneofCase ValueCase {
       get { return valueCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearValue() {
       valueCase_ = ValueOneofCase.None;
       value_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as OneofMerging);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(OneofMerging other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2534,6 +2750,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (valueCase_ == ValueOneofCase.Text) hash ^= Text.GetHashCode();
@@ -2546,11 +2763,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2571,6 +2790,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (valueCase_ == ValueOneofCase.Text) {
         output.WriteRawTag(10);
@@ -2587,6 +2807,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (valueCase_ == ValueOneofCase.Text) {
@@ -2602,6 +2823,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(OneofMerging other) {
       if (other == null) {
         return;
@@ -2622,6 +2844,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2652,6 +2875,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2680,6 +2904,7 @@ namespace UnitTest.Issues.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the OneofMerging message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class Nested : pb::IMessage<Nested>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -2689,19 +2914,23 @@ namespace UnitTest.Issues.TestProtos {
         private static readonly pb::MessageParser<Nested> _parser = new pb::MessageParser<Nested>(() => new Nested());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<Nested> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::UnitTest.Issues.TestProtos.OneofMerging.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Nested() {
           OnConstruction();
         }
@@ -2709,6 +2938,7 @@ namespace UnitTest.Issues.TestProtos {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Nested(Nested other) : this() {
           x_ = other.x_;
           y_ = other.y_;
@@ -2716,6 +2946,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Nested Clone() {
           return new Nested(this);
         }
@@ -2724,6 +2955,7 @@ namespace UnitTest.Issues.TestProtos {
         public const int XFieldNumber = 1;
         private int x_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int X {
           get { return x_; }
           set {
@@ -2735,6 +2967,7 @@ namespace UnitTest.Issues.TestProtos {
         public const int YFieldNumber = 2;
         private int y_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Y {
           get { return y_; }
           set {
@@ -2743,11 +2976,13 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as Nested);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(Nested other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -2761,6 +2996,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (X != 0) hash ^= X.GetHashCode();
@@ -2772,11 +3008,13 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -2797,6 +3035,7 @@ namespace UnitTest.Issues.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (X != 0) {
             output.WriteRawTag(8);
@@ -2813,6 +3052,7 @@ namespace UnitTest.Issues.TestProtos {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (X != 0) {
@@ -2828,6 +3068,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(Nested other) {
           if (other == null) {
             return;
@@ -2842,6 +3083,7 @@ namespace UnitTest.Issues.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -2867,6 +3109,7 @@ namespace UnitTest.Issues.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -2902,19 +3145,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<NullValueOutsideStruct> _parser = new pb::MessageParser<NullValueOutsideStruct>(() => new NullValueOutsideStruct());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<NullValueOutsideStruct> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[9]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NullValueOutsideStruct() {
       OnConstruction();
     }
@@ -2922,6 +3169,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NullValueOutsideStruct(NullValueOutsideStruct other) : this() {
       switch (other.ValueCase) {
         case ValueOneofCase.StringValue:
@@ -2936,6 +3184,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NullValueOutsideStruct Clone() {
       return new NullValueOutsideStruct(this);
     }
@@ -2943,6 +3192,7 @@ namespace UnitTest.Issues.TestProtos {
     /// <summary>Field number for the "string_value" field.</summary>
     public const int StringValueFieldNumber = 1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringValue {
       get { return valueCase_ == ValueOneofCase.StringValue ? (string) value_ : ""; }
       set {
@@ -2954,6 +3204,7 @@ namespace UnitTest.Issues.TestProtos {
     /// <summary>Field number for the "null_value" field.</summary>
     public const int NullValueFieldNumber = 2;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.NullValue NullValue {
       get { return valueCase_ == ValueOneofCase.NullValue ? (global::Google.Protobuf.WellKnownTypes.NullValue) value_ : global::Google.Protobuf.WellKnownTypes.NullValue.NullValue; }
       set {
@@ -2971,22 +3222,26 @@ namespace UnitTest.Issues.TestProtos {
     }
     private ValueOneofCase valueCase_ = ValueOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ValueOneofCase ValueCase {
       get { return valueCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearValue() {
       valueCase_ = ValueOneofCase.None;
       value_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as NullValueOutsideStruct);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(NullValueOutsideStruct other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3001,6 +3256,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (valueCase_ == ValueOneofCase.StringValue) hash ^= StringValue.GetHashCode();
@@ -3013,11 +3269,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3038,6 +3296,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (valueCase_ == ValueOneofCase.StringValue) {
         output.WriteRawTag(10);
@@ -3054,6 +3313,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (valueCase_ == ValueOneofCase.StringValue) {
@@ -3069,6 +3329,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(NullValueOutsideStruct other) {
       if (other == null) {
         return;
@@ -3086,6 +3347,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3112,6 +3374,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3143,19 +3406,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<NullValueNotInOneof> _parser = new pb::MessageParser<NullValueNotInOneof>(() => new NullValueNotInOneof());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<NullValueNotInOneof> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[10]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NullValueNotInOneof() {
       OnConstruction();
     }
@@ -3163,12 +3430,14 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NullValueNotInOneof(NullValueNotInOneof other) : this() {
       nullValue_ = other.nullValue_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NullValueNotInOneof Clone() {
       return new NullValueNotInOneof(this);
     }
@@ -3177,6 +3446,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int NullValueFieldNumber = 2;
     private global::Google.Protobuf.WellKnownTypes.NullValue nullValue_ = global::Google.Protobuf.WellKnownTypes.NullValue.NullValue;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.NullValue NullValue {
       get { return nullValue_; }
       set {
@@ -3185,11 +3455,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as NullValueNotInOneof);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(NullValueNotInOneof other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3202,6 +3474,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (NullValue != global::Google.Protobuf.WellKnownTypes.NullValue.NullValue) hash ^= NullValue.GetHashCode();
@@ -3212,11 +3485,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3233,6 +3508,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (NullValue != global::Google.Protobuf.WellKnownTypes.NullValue.NullValue) {
         output.WriteRawTag(16);
@@ -3245,6 +3521,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (NullValue != global::Google.Protobuf.WellKnownTypes.NullValue.NullValue) {
@@ -3257,6 +3534,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(NullValueNotInOneof other) {
       if (other == null) {
         return;
@@ -3268,6 +3546,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3289,6 +3568,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3315,19 +3595,23 @@ namespace UnitTest.Issues.TestProtos {
     private static readonly pb::MessageParser<MixedRegularAndOptional> _parser = new pb::MessageParser<MixedRegularAndOptional>(() => new MixedRegularAndOptional());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MixedRegularAndOptional> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.UnittestIssuesReflection.Descriptor.MessageTypes[11]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MixedRegularAndOptional() {
       OnConstruction();
     }
@@ -3335,6 +3619,7 @@ namespace UnitTest.Issues.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MixedRegularAndOptional(MixedRegularAndOptional other) : this() {
       regularField_ = other.regularField_;
       optionalField_ = other.optionalField_;
@@ -3342,6 +3627,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MixedRegularAndOptional Clone() {
       return new MixedRegularAndOptional(this);
     }
@@ -3350,6 +3636,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int RegularFieldFieldNumber = 1;
     private string regularField_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string RegularField {
       get { return regularField_; }
       set {
@@ -3361,6 +3648,7 @@ namespace UnitTest.Issues.TestProtos {
     public const int OptionalFieldFieldNumber = 2;
     private string optionalField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalField {
       get { return optionalField_ ?? ""; }
       set {
@@ -3369,21 +3657,25 @@ namespace UnitTest.Issues.TestProtos {
     }
     /// <summary>Gets whether the "optional_field" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalField {
       get { return optionalField_ != null; }
     }
     /// <summary>Clears the value of the "optional_field" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalField() {
       optionalField_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MixedRegularAndOptional);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MixedRegularAndOptional other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3397,6 +3689,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (RegularField.Length != 0) hash ^= RegularField.GetHashCode();
@@ -3408,11 +3701,13 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3433,6 +3728,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (RegularField.Length != 0) {
         output.WriteRawTag(10);
@@ -3449,6 +3745,7 @@ namespace UnitTest.Issues.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (RegularField.Length != 0) {
@@ -3464,6 +3761,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MixedRegularAndOptional other) {
       if (other == null) {
         return;
@@ -3478,6 +3776,7 @@ namespace UnitTest.Issues.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3503,6 +3802,7 @@ namespace UnitTest.Issues.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3.cs
index b81eb57383..1af0d9e3f6 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3.cs
@@ -262,19 +262,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestAllTypes> _parser = new pb::MessageParser<TestAllTypes>(() => new TestAllTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestAllTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypes() {
       OnConstruction();
     }
@@ -282,6 +286,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypes(TestAllTypes other) : this() {
       singleInt32_ = other.singleInt32_;
       singleInt64_ = other.singleInt64_;
@@ -346,6 +351,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestAllTypes Clone() {
       return new TestAllTypes(this);
     }
@@ -357,6 +363,7 @@ namespace Google.Protobuf.TestProtos {
     /// Singular
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int SingleInt32 {
       get { return singleInt32_; }
       set {
@@ -368,6 +375,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleInt64FieldNumber = 2;
     private long singleInt64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long SingleInt64 {
       get { return singleInt64_; }
       set {
@@ -379,6 +387,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleUint32FieldNumber = 3;
     private uint singleUint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint SingleUint32 {
       get { return singleUint32_; }
       set {
@@ -390,6 +399,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleUint64FieldNumber = 4;
     private ulong singleUint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong SingleUint64 {
       get { return singleUint64_; }
       set {
@@ -401,6 +411,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleSint32FieldNumber = 5;
     private int singleSint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int SingleSint32 {
       get { return singleSint32_; }
       set {
@@ -412,6 +423,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleSint64FieldNumber = 6;
     private long singleSint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long SingleSint64 {
       get { return singleSint64_; }
       set {
@@ -423,6 +435,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleFixed32FieldNumber = 7;
     private uint singleFixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint SingleFixed32 {
       get { return singleFixed32_; }
       set {
@@ -434,6 +447,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleFixed64FieldNumber = 8;
     private ulong singleFixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong SingleFixed64 {
       get { return singleFixed64_; }
       set {
@@ -445,6 +459,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleSfixed32FieldNumber = 9;
     private int singleSfixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int SingleSfixed32 {
       get { return singleSfixed32_; }
       set {
@@ -456,6 +471,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleSfixed64FieldNumber = 10;
     private long singleSfixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long SingleSfixed64 {
       get { return singleSfixed64_; }
       set {
@@ -467,6 +483,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleFloatFieldNumber = 11;
     private float singleFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float SingleFloat {
       get { return singleFloat_; }
       set {
@@ -478,6 +495,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleDoubleFieldNumber = 12;
     private double singleDouble_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double SingleDouble {
       get { return singleDouble_; }
       set {
@@ -489,6 +507,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleBoolFieldNumber = 13;
     private bool singleBool_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool SingleBool {
       get { return singleBool_; }
       set {
@@ -500,6 +519,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleStringFieldNumber = 14;
     private string singleString_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string SingleString {
       get { return singleString_; }
       set {
@@ -511,6 +531,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleBytesFieldNumber = 15;
     private pb::ByteString singleBytes_ = pb::ByteString.Empty;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString SingleBytes {
       get { return singleBytes_; }
       set {
@@ -522,6 +543,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleNestedMessageFieldNumber = 18;
     private global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedMessage singleNestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedMessage SingleNestedMessage {
       get { return singleNestedMessage_; }
       set {
@@ -533,6 +555,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleForeignMessageFieldNumber = 19;
     private global::Google.Protobuf.TestProtos.ForeignMessage singleForeignMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.ForeignMessage SingleForeignMessage {
       get { return singleForeignMessage_; }
       set {
@@ -544,6 +567,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleImportMessageFieldNumber = 20;
     private global::Google.Protobuf.TestProtos.ImportMessage singleImportMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.ImportMessage SingleImportMessage {
       get { return singleImportMessage_; }
       set {
@@ -555,6 +579,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleNestedEnumFieldNumber = 21;
     private global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedEnum singleNestedEnum_ = global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedEnum.Unspecified;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedEnum SingleNestedEnum {
       get { return singleNestedEnum_; }
       set {
@@ -566,6 +591,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleForeignEnumFieldNumber = 22;
     private global::Google.Protobuf.TestProtos.ForeignEnum singleForeignEnum_ = global::Google.Protobuf.TestProtos.ForeignEnum.ForeignUnspecified;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.ForeignEnum SingleForeignEnum {
       get { return singleForeignEnum_; }
       set {
@@ -577,6 +603,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleImportEnumFieldNumber = 23;
     private global::Google.Protobuf.TestProtos.ImportEnum singleImportEnum_ = global::Google.Protobuf.TestProtos.ImportEnum.Unspecified;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.ImportEnum SingleImportEnum {
       get { return singleImportEnum_; }
       set {
@@ -591,6 +618,7 @@ namespace Google.Protobuf.TestProtos {
     /// Defined in unittest_import_public.proto
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.PublicImportMessage SinglePublicImportMessage {
       get { return singlePublicImportMessage_; }
       set {
@@ -607,6 +635,7 @@ namespace Google.Protobuf.TestProtos {
     /// Repeated
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedInt32 {
       get { return repeatedInt32_; }
     }
@@ -617,6 +646,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForInt64(258);
     private readonly pbc::RepeatedField<long> repeatedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedInt64 {
       get { return repeatedInt64_; }
     }
@@ -627,6 +657,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForUInt32(266);
     private readonly pbc::RepeatedField<uint> repeatedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> RepeatedUint32 {
       get { return repeatedUint32_; }
     }
@@ -637,6 +668,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForUInt64(274);
     private readonly pbc::RepeatedField<ulong> repeatedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedUint64 {
       get { return repeatedUint64_; }
     }
@@ -647,6 +679,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSInt32(282);
     private readonly pbc::RepeatedField<int> repeatedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedSint32 {
       get { return repeatedSint32_; }
     }
@@ -657,6 +690,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSInt64(290);
     private readonly pbc::RepeatedField<long> repeatedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedSint64 {
       get { return repeatedSint64_; }
     }
@@ -667,6 +701,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForFixed32(298);
     private readonly pbc::RepeatedField<uint> repeatedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> RepeatedFixed32 {
       get { return repeatedFixed32_; }
     }
@@ -677,6 +712,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForFixed64(306);
     private readonly pbc::RepeatedField<ulong> repeatedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedFixed64 {
       get { return repeatedFixed64_; }
     }
@@ -687,6 +723,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSFixed32(314);
     private readonly pbc::RepeatedField<int> repeatedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedSfixed32 {
       get { return repeatedSfixed32_; }
     }
@@ -697,6 +734,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSFixed64(322);
     private readonly pbc::RepeatedField<long> repeatedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedSfixed64 {
       get { return repeatedSfixed64_; }
     }
@@ -707,6 +745,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForFloat(330);
     private readonly pbc::RepeatedField<float> repeatedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> RepeatedFloat {
       get { return repeatedFloat_; }
     }
@@ -717,6 +756,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForDouble(338);
     private readonly pbc::RepeatedField<double> repeatedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> RepeatedDouble {
       get { return repeatedDouble_; }
     }
@@ -727,6 +767,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForBool(346);
     private readonly pbc::RepeatedField<bool> repeatedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> RepeatedBool {
       get { return repeatedBool_; }
     }
@@ -737,6 +778,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForString(354);
     private readonly pbc::RepeatedField<string> repeatedString_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedString {
       get { return repeatedString_; }
     }
@@ -747,6 +789,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForBytes(362);
     private readonly pbc::RepeatedField<pb::ByteString> repeatedBytes_ = new pbc::RepeatedField<pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<pb::ByteString> RepeatedBytes {
       get { return repeatedBytes_; }
     }
@@ -757,6 +800,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(386, global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedMessage.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedMessage> repeatedNestedMessage_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedMessage> RepeatedNestedMessage {
       get { return repeatedNestedMessage_; }
     }
@@ -767,6 +811,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(394, global::Google.Protobuf.TestProtos.ForeignMessage.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignMessage> repeatedForeignMessage_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignMessage> RepeatedForeignMessage {
       get { return repeatedForeignMessage_; }
     }
@@ -777,6 +822,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(402, global::Google.Protobuf.TestProtos.ImportMessage.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.ImportMessage> repeatedImportMessage_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.ImportMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.ImportMessage> RepeatedImportMessage {
       get { return repeatedImportMessage_; }
     }
@@ -787,6 +833,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForEnum(410, x => (int) x, x => (global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedEnum> repeatedNestedEnum_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedEnum> RepeatedNestedEnum {
       get { return repeatedNestedEnum_; }
     }
@@ -797,6 +844,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForEnum(418, x => (int) x, x => (global::Google.Protobuf.TestProtos.ForeignEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum> repeatedForeignEnum_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum> RepeatedForeignEnum {
       get { return repeatedForeignEnum_; }
     }
@@ -807,6 +855,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForEnum(426, x => (int) x, x => (global::Google.Protobuf.TestProtos.ImportEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.ImportEnum> repeatedImportEnum_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.ImportEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.ImportEnum> RepeatedImportEnum {
       get { return repeatedImportEnum_; }
     }
@@ -820,6 +869,7 @@ namespace Google.Protobuf.TestProtos {
     /// Defined in unittest_import_public.proto
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.PublicImportMessage> RepeatedPublicImportMessage {
       get { return repeatedPublicImportMessage_; }
     }
@@ -827,6 +877,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "oneof_uint32" field.</summary>
     public const int OneofUint32FieldNumber = 111;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OneofUint32 {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofUint32 ? (uint) oneofField_ : 0; }
       set {
@@ -838,6 +889,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "oneof_nested_message" field.</summary>
     public const int OneofNestedMessageFieldNumber = 112;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedMessage OneofNestedMessage {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofNestedMessage ? (global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedMessage) oneofField_ : null; }
       set {
@@ -849,6 +901,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "oneof_string" field.</summary>
     public const int OneofStringFieldNumber = 113;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OneofString {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofString ? (string) oneofField_ : ""; }
       set {
@@ -860,6 +913,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "oneof_bytes" field.</summary>
     public const int OneofBytesFieldNumber = 114;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OneofBytes {
       get { return oneofFieldCase_ == OneofFieldOneofCase.OneofBytes ? (pb::ByteString) oneofField_ : pb::ByteString.Empty; }
       set {
@@ -879,22 +933,26 @@ namespace Google.Protobuf.TestProtos {
     }
     private OneofFieldOneofCase oneofFieldCase_ = OneofFieldOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofFieldOneofCase OneofFieldCase {
       get { return oneofFieldCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofField() {
       oneofFieldCase_ = OneofFieldOneofCase.None;
       oneofField_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestAllTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestAllTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -955,6 +1013,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (SingleInt32 != 0) hash ^= SingleInt32.GetHashCode();
@@ -1013,11 +1072,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1156,6 +1217,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (SingleInt32 != 0) {
         output.WriteRawTag(8);
@@ -1290,6 +1352,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (SingleInt32 != 0) {
@@ -1399,6 +1462,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestAllTypes other) {
       if (other == null) {
         return;
@@ -1525,6 +1589,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1767,6 +1832,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2007,6 +2073,7 @@ namespace Google.Protobuf.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the TestAllTypes message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum NestedEnum {
         [pbr::OriginalName("NESTED_ENUM_UNSPECIFIED")] Unspecified = 0,
@@ -2027,19 +2094,23 @@ namespace Google.Protobuf.TestProtos {
         private static readonly pb::MessageParser<NestedMessage> _parser = new pb::MessageParser<NestedMessage>(() => new NestedMessage());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.TestAllTypes.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -2047,12 +2118,14 @@ namespace Google.Protobuf.TestProtos {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           bb_ = other.bb_;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -2066,6 +2139,7 @@ namespace Google.Protobuf.TestProtos {
         /// This file needs to compile in proto1 to test backwards-compatibility.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Bb {
           get { return bb_; }
           set {
@@ -2074,11 +2148,13 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -2091,6 +2167,7 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (Bb != 0) hash ^= Bb.GetHashCode();
@@ -2101,11 +2178,13 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -2122,6 +2201,7 @@ namespace Google.Protobuf.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (Bb != 0) {
             output.WriteRawTag(8);
@@ -2134,6 +2214,7 @@ namespace Google.Protobuf.TestProtos {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (Bb != 0) {
@@ -2146,6 +2227,7 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -2157,6 +2239,7 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -2178,6 +2261,7 @@ namespace Google.Protobuf.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -2212,19 +2296,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<NestedTestAllTypes> _parser = new pb::MessageParser<NestedTestAllTypes>(() => new NestedTestAllTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<NestedTestAllTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NestedTestAllTypes() {
       OnConstruction();
     }
@@ -2232,6 +2320,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NestedTestAllTypes(NestedTestAllTypes other) : this() {
       child_ = other.child_ != null ? other.child_.Clone() : null;
       payload_ = other.payload_ != null ? other.payload_.Clone() : null;
@@ -2240,6 +2329,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public NestedTestAllTypes Clone() {
       return new NestedTestAllTypes(this);
     }
@@ -2248,6 +2338,7 @@ namespace Google.Protobuf.TestProtos {
     public const int ChildFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.NestedTestAllTypes child_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.NestedTestAllTypes Child {
       get { return child_; }
       set {
@@ -2259,6 +2350,7 @@ namespace Google.Protobuf.TestProtos {
     public const int PayloadFieldNumber = 2;
     private global::Google.Protobuf.TestProtos.TestAllTypes payload_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestAllTypes Payload {
       get { return payload_; }
       set {
@@ -2272,16 +2364,19 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(26, global::Google.Protobuf.TestProtos.NestedTestAllTypes.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.NestedTestAllTypes> repeatedChild_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.NestedTestAllTypes>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.NestedTestAllTypes> RepeatedChild {
       get { return repeatedChild_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as NestedTestAllTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(NestedTestAllTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2296,6 +2391,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (child_ != null) hash ^= Child.GetHashCode();
@@ -2308,11 +2404,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2334,6 +2432,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (child_ != null) {
         output.WriteRawTag(10);
@@ -2351,6 +2450,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (child_ != null) {
@@ -2367,6 +2467,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(NestedTestAllTypes other) {
       if (other == null) {
         return;
@@ -2388,6 +2489,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2423,6 +2525,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2463,19 +2566,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestDeprecatedFields> _parser = new pb::MessageParser<TestDeprecatedFields>(() => new TestDeprecatedFields());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestDeprecatedFields> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDeprecatedFields() {
       OnConstruction();
     }
@@ -2483,12 +2590,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDeprecatedFields(TestDeprecatedFields other) : this() {
       deprecatedInt32_ = other.deprecatedInt32_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestDeprecatedFields Clone() {
       return new TestDeprecatedFields(this);
     }
@@ -2498,6 +2607,7 @@ namespace Google.Protobuf.TestProtos {
     private int deprecatedInt32_;
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int DeprecatedInt32 {
       get { return deprecatedInt32_; }
       set {
@@ -2506,11 +2616,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestDeprecatedFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestDeprecatedFields other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2523,6 +2635,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (DeprecatedInt32 != 0) hash ^= DeprecatedInt32.GetHashCode();
@@ -2533,11 +2646,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2554,6 +2669,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (DeprecatedInt32 != 0) {
         output.WriteRawTag(8);
@@ -2566,6 +2682,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (DeprecatedInt32 != 0) {
@@ -2578,6 +2695,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestDeprecatedFields other) {
       if (other == null) {
         return;
@@ -2589,6 +2707,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2610,6 +2729,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2640,19 +2760,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<ForeignMessage> _parser = new pb::MessageParser<ForeignMessage>(() => new ForeignMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ForeignMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[3]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessage() {
       OnConstruction();
     }
@@ -2660,12 +2784,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessage(ForeignMessage other) : this() {
       c_ = other.c_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ForeignMessage Clone() {
       return new ForeignMessage(this);
     }
@@ -2674,6 +2800,7 @@ namespace Google.Protobuf.TestProtos {
     public const int CFieldNumber = 1;
     private int c_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int C {
       get { return c_; }
       set {
@@ -2682,11 +2809,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ForeignMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ForeignMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2699,6 +2828,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (C != 0) hash ^= C.GetHashCode();
@@ -2709,11 +2839,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2730,6 +2862,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (C != 0) {
         output.WriteRawTag(8);
@@ -2742,6 +2875,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (C != 0) {
@@ -2754,6 +2888,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ForeignMessage other) {
       if (other == null) {
         return;
@@ -2765,6 +2900,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2786,6 +2922,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2812,19 +2949,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestReservedFields> _parser = new pb::MessageParser<TestReservedFields>(() => new TestReservedFields());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestReservedFields> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[4]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReservedFields() {
       OnConstruction();
     }
@@ -2832,21 +2973,25 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReservedFields(TestReservedFields other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReservedFields Clone() {
       return new TestReservedFields(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestReservedFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestReservedFields other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2858,6 +3003,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -2867,11 +3013,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2884,6 +3032,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -2892,6 +3041,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -2901,6 +3051,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestReservedFields other) {
       if (other == null) {
         return;
@@ -2909,6 +3060,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2926,6 +3078,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2951,19 +3104,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestForeignNested> _parser = new pb::MessageParser<TestForeignNested>(() => new TestForeignNested());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestForeignNested> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[5]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestForeignNested() {
       OnConstruction();
     }
@@ -2971,12 +3128,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestForeignNested(TestForeignNested other) : this() {
       foreignNested_ = other.foreignNested_ != null ? other.foreignNested_.Clone() : null;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestForeignNested Clone() {
       return new TestForeignNested(this);
     }
@@ -2985,6 +3144,7 @@ namespace Google.Protobuf.TestProtos {
     public const int ForeignNestedFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedMessage foreignNested_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestAllTypes.Types.NestedMessage ForeignNested {
       get { return foreignNested_; }
       set {
@@ -2993,11 +3153,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestForeignNested);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestForeignNested other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3010,6 +3172,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (foreignNested_ != null) hash ^= ForeignNested.GetHashCode();
@@ -3020,11 +3183,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3041,6 +3206,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (foreignNested_ != null) {
         output.WriteRawTag(10);
@@ -3053,6 +3219,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (foreignNested_ != null) {
@@ -3065,6 +3232,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestForeignNested other) {
       if (other == null) {
         return;
@@ -3079,6 +3247,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3103,6 +3272,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3135,19 +3305,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestReallyLargeTagNumber> _parser = new pb::MessageParser<TestReallyLargeTagNumber>(() => new TestReallyLargeTagNumber());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestReallyLargeTagNumber> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[6]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReallyLargeTagNumber() {
       OnConstruction();
     }
@@ -3155,6 +3329,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReallyLargeTagNumber(TestReallyLargeTagNumber other) : this() {
       a_ = other.a_;
       bb_ = other.bb_;
@@ -3162,6 +3337,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestReallyLargeTagNumber Clone() {
       return new TestReallyLargeTagNumber(this);
     }
@@ -3174,6 +3350,7 @@ namespace Google.Protobuf.TestProtos {
     /// three bits to communicate wire type.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int A {
       get { return a_; }
       set {
@@ -3185,6 +3362,7 @@ namespace Google.Protobuf.TestProtos {
     public const int BbFieldNumber = 268435455;
     private int bb_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Bb {
       get { return bb_; }
       set {
@@ -3193,11 +3371,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestReallyLargeTagNumber);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestReallyLargeTagNumber other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3211,6 +3391,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (A != 0) hash ^= A.GetHashCode();
@@ -3222,11 +3403,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3247,6 +3430,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (A != 0) {
         output.WriteRawTag(8);
@@ -3263,6 +3447,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (A != 0) {
@@ -3278,6 +3463,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestReallyLargeTagNumber other) {
       if (other == null) {
         return;
@@ -3292,6 +3478,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3317,6 +3504,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3347,19 +3535,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestRecursiveMessage> _parser = new pb::MessageParser<TestRecursiveMessage>(() => new TestRecursiveMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestRecursiveMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[7]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRecursiveMessage() {
       OnConstruction();
     }
@@ -3367,6 +3559,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRecursiveMessage(TestRecursiveMessage other) : this() {
       a_ = other.a_ != null ? other.a_.Clone() : null;
       i_ = other.i_;
@@ -3374,6 +3567,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRecursiveMessage Clone() {
       return new TestRecursiveMessage(this);
     }
@@ -3382,6 +3576,7 @@ namespace Google.Protobuf.TestProtos {
     public const int AFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.TestRecursiveMessage a_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestRecursiveMessage A {
       get { return a_; }
       set {
@@ -3393,6 +3588,7 @@ namespace Google.Protobuf.TestProtos {
     public const int IFieldNumber = 2;
     private int i_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int I {
       get { return i_; }
       set {
@@ -3401,11 +3597,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestRecursiveMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestRecursiveMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3419,6 +3617,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (a_ != null) hash ^= A.GetHashCode();
@@ -3430,11 +3629,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3455,6 +3656,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (a_ != null) {
         output.WriteRawTag(10);
@@ -3471,6 +3673,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (a_ != null) {
@@ -3486,6 +3689,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestRecursiveMessage other) {
       if (other == null) {
         return;
@@ -3503,6 +3707,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3531,6 +3736,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3567,19 +3773,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestMutualRecursionA> _parser = new pb::MessageParser<TestMutualRecursionA>(() => new TestMutualRecursionA());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestMutualRecursionA> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[8]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionA() {
       OnConstruction();
     }
@@ -3587,12 +3797,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionA(TestMutualRecursionA other) : this() {
       bb_ = other.bb_ != null ? other.bb_.Clone() : null;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionA Clone() {
       return new TestMutualRecursionA(this);
     }
@@ -3601,6 +3813,7 @@ namespace Google.Protobuf.TestProtos {
     public const int BbFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.TestMutualRecursionB bb_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestMutualRecursionB Bb {
       get { return bb_; }
       set {
@@ -3609,11 +3822,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestMutualRecursionA);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestMutualRecursionA other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3626,6 +3841,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (bb_ != null) hash ^= Bb.GetHashCode();
@@ -3636,11 +3852,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3657,6 +3875,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (bb_ != null) {
         output.WriteRawTag(10);
@@ -3669,6 +3888,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (bb_ != null) {
@@ -3681,6 +3901,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestMutualRecursionA other) {
       if (other == null) {
         return;
@@ -3695,6 +3916,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3719,6 +3941,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3748,19 +3971,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestMutualRecursionB> _parser = new pb::MessageParser<TestMutualRecursionB>(() => new TestMutualRecursionB());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestMutualRecursionB> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[9]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionB() {
       OnConstruction();
     }
@@ -3768,6 +3995,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionB(TestMutualRecursionB other) : this() {
       a_ = other.a_ != null ? other.a_.Clone() : null;
       optionalInt32_ = other.optionalInt32_;
@@ -3775,6 +4003,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestMutualRecursionB Clone() {
       return new TestMutualRecursionB(this);
     }
@@ -3783,6 +4012,7 @@ namespace Google.Protobuf.TestProtos {
     public const int AFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.TestMutualRecursionA a_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestMutualRecursionA A {
       get { return a_; }
       set {
@@ -3794,6 +4024,7 @@ namespace Google.Protobuf.TestProtos {
     public const int OptionalInt32FieldNumber = 2;
     private int optionalInt32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalInt32 {
       get { return optionalInt32_; }
       set {
@@ -3802,11 +4033,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestMutualRecursionB);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestMutualRecursionB other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3820,6 +4053,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (a_ != null) hash ^= A.GetHashCode();
@@ -3831,11 +4065,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3856,6 +4092,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (a_ != null) {
         output.WriteRawTag(10);
@@ -3872,6 +4109,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (a_ != null) {
@@ -3887,6 +4125,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestMutualRecursionB other) {
       if (other == null) {
         return;
@@ -3904,6 +4143,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3932,6 +4172,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3965,19 +4206,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestEnumAllowAlias> _parser = new pb::MessageParser<TestEnumAllowAlias>(() => new TestEnumAllowAlias());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestEnumAllowAlias> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[10]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEnumAllowAlias() {
       OnConstruction();
     }
@@ -3985,12 +4230,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEnumAllowAlias(TestEnumAllowAlias other) : this() {
       value_ = other.value_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEnumAllowAlias Clone() {
       return new TestEnumAllowAlias(this);
     }
@@ -3999,6 +4246,7 @@ namespace Google.Protobuf.TestProtos {
     public const int ValueFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.TestEnumWithDupValue value_ = global::Google.Protobuf.TestProtos.TestEnumWithDupValue.Unspecified;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestEnumWithDupValue Value {
       get { return value_; }
       set {
@@ -4007,11 +4255,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestEnumAllowAlias);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestEnumAllowAlias other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -4024,6 +4274,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value != global::Google.Protobuf.TestProtos.TestEnumWithDupValue.Unspecified) hash ^= Value.GetHashCode();
@@ -4034,11 +4285,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -4055,6 +4308,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value != global::Google.Protobuf.TestProtos.TestEnumWithDupValue.Unspecified) {
         output.WriteRawTag(8);
@@ -4067,6 +4321,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value != global::Google.Protobuf.TestProtos.TestEnumWithDupValue.Unspecified) {
@@ -4079,6 +4334,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestEnumAllowAlias other) {
       if (other == null) {
         return;
@@ -4090,6 +4346,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -4111,6 +4368,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -4141,19 +4399,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestCamelCaseFieldNames> _parser = new pb::MessageParser<TestCamelCaseFieldNames>(() => new TestCamelCaseFieldNames());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestCamelCaseFieldNames> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[11]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCamelCaseFieldNames() {
       OnConstruction();
     }
@@ -4161,6 +4423,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCamelCaseFieldNames(TestCamelCaseFieldNames other) : this() {
       primitiveField_ = other.primitiveField_;
       stringField_ = other.stringField_;
@@ -4174,6 +4437,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCamelCaseFieldNames Clone() {
       return new TestCamelCaseFieldNames(this);
     }
@@ -4182,6 +4446,7 @@ namespace Google.Protobuf.TestProtos {
     public const int PrimitiveFieldFieldNumber = 1;
     private int primitiveField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int PrimitiveField {
       get { return primitiveField_; }
       set {
@@ -4193,6 +4458,7 @@ namespace Google.Protobuf.TestProtos {
     public const int StringFieldFieldNumber = 2;
     private string stringField_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringField {
       get { return stringField_; }
       set {
@@ -4204,6 +4470,7 @@ namespace Google.Protobuf.TestProtos {
     public const int EnumFieldFieldNumber = 3;
     private global::Google.Protobuf.TestProtos.ForeignEnum enumField_ = global::Google.Protobuf.TestProtos.ForeignEnum.ForeignUnspecified;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.ForeignEnum EnumField {
       get { return enumField_; }
       set {
@@ -4215,6 +4482,7 @@ namespace Google.Protobuf.TestProtos {
     public const int MessageFieldFieldNumber = 4;
     private global::Google.Protobuf.TestProtos.ForeignMessage messageField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.ForeignMessage MessageField {
       get { return messageField_; }
       set {
@@ -4228,6 +4496,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForInt32(58);
     private readonly pbc::RepeatedField<int> repeatedPrimitiveField_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedPrimitiveField {
       get { return repeatedPrimitiveField_; }
     }
@@ -4238,6 +4507,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForString(66);
     private readonly pbc::RepeatedField<string> repeatedStringField_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> RepeatedStringField {
       get { return repeatedStringField_; }
     }
@@ -4248,6 +4518,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForEnum(74, x => (int) x, x => (global::Google.Protobuf.TestProtos.ForeignEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum> repeatedEnumField_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum> RepeatedEnumField {
       get { return repeatedEnumField_; }
     }
@@ -4258,16 +4529,19 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(82, global::Google.Protobuf.TestProtos.ForeignMessage.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignMessage> repeatedMessageField_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignMessage>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignMessage> RepeatedMessageField {
       get { return repeatedMessageField_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestCamelCaseFieldNames);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestCamelCaseFieldNames other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -4287,6 +4561,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (PrimitiveField != 0) hash ^= PrimitiveField.GetHashCode();
@@ -4304,11 +4579,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -4341,6 +4618,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (PrimitiveField != 0) {
         output.WriteRawTag(8);
@@ -4369,6 +4647,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (PrimitiveField != 0) {
@@ -4394,6 +4673,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestCamelCaseFieldNames other) {
       if (other == null) {
         return;
@@ -4421,6 +4701,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -4475,6 +4756,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -4538,19 +4820,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestFieldOrderings> _parser = new pb::MessageParser<TestFieldOrderings>(() => new TestFieldOrderings());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestFieldOrderings> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[12]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestFieldOrderings() {
       OnConstruction();
     }
@@ -4558,6 +4844,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestFieldOrderings(TestFieldOrderings other) : this() {
       myString_ = other.myString_;
       myInt_ = other.myInt_;
@@ -4567,6 +4854,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestFieldOrderings Clone() {
       return new TestFieldOrderings(this);
     }
@@ -4575,6 +4863,7 @@ namespace Google.Protobuf.TestProtos {
     public const int MyStringFieldNumber = 11;
     private string myString_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string MyString {
       get { return myString_; }
       set {
@@ -4586,6 +4875,7 @@ namespace Google.Protobuf.TestProtos {
     public const int MyIntFieldNumber = 1;
     private long myInt_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long MyInt {
       get { return myInt_; }
       set {
@@ -4597,6 +4887,7 @@ namespace Google.Protobuf.TestProtos {
     public const int MyFloatFieldNumber = 101;
     private float myFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float MyFloat {
       get { return myFloat_; }
       set {
@@ -4608,6 +4899,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SingleNestedMessageFieldNumber = 200;
     private global::Google.Protobuf.TestProtos.TestFieldOrderings.Types.NestedMessage singleNestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestFieldOrderings.Types.NestedMessage SingleNestedMessage {
       get { return singleNestedMessage_; }
       set {
@@ -4616,11 +4908,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestFieldOrderings);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestFieldOrderings other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -4636,6 +4930,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (MyString.Length != 0) hash ^= MyString.GetHashCode();
@@ -4649,11 +4944,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -4682,6 +4979,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (MyInt != 0L) {
         output.WriteRawTag(8);
@@ -4706,6 +5004,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (MyString.Length != 0) {
@@ -4727,6 +5026,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestFieldOrderings other) {
       if (other == null) {
         return;
@@ -4750,6 +5050,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -4786,6 +5087,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -4820,6 +5122,7 @@ namespace Google.Protobuf.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the TestFieldOrderings message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class NestedMessage : pb::IMessage<NestedMessage>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -4829,19 +5132,23 @@ namespace Google.Protobuf.TestProtos {
         private static readonly pb::MessageParser<NestedMessage> _parser = new pb::MessageParser<NestedMessage>(() => new NestedMessage());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.TestFieldOrderings.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -4849,6 +5156,7 @@ namespace Google.Protobuf.TestProtos {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           oo_ = other.oo_;
           bb_ = other.bb_;
@@ -4856,6 +5164,7 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -4864,6 +5173,7 @@ namespace Google.Protobuf.TestProtos {
         public const int OoFieldNumber = 2;
         private long oo_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public long Oo {
           get { return oo_; }
           set {
@@ -4880,6 +5190,7 @@ namespace Google.Protobuf.TestProtos {
         /// This file needs to compile in proto1 to test backwards-compatibility.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Bb {
           get { return bb_; }
           set {
@@ -4888,11 +5199,13 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -4906,6 +5219,7 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (Oo != 0L) hash ^= Oo.GetHashCode();
@@ -4917,11 +5231,13 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -4942,6 +5258,7 @@ namespace Google.Protobuf.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (Bb != 0) {
             output.WriteRawTag(8);
@@ -4958,6 +5275,7 @@ namespace Google.Protobuf.TestProtos {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (Oo != 0L) {
@@ -4973,6 +5291,7 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -4987,6 +5306,7 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -5012,6 +5332,7 @@ namespace Google.Protobuf.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -5047,19 +5368,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<SparseEnumMessage> _parser = new pb::MessageParser<SparseEnumMessage>(() => new SparseEnumMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<SparseEnumMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[13]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SparseEnumMessage() {
       OnConstruction();
     }
@@ -5067,12 +5392,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SparseEnumMessage(SparseEnumMessage other) : this() {
       sparseEnum_ = other.sparseEnum_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SparseEnumMessage Clone() {
       return new SparseEnumMessage(this);
     }
@@ -5081,6 +5408,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SparseEnumFieldNumber = 1;
     private global::Google.Protobuf.TestProtos.TestSparseEnum sparseEnum_ = global::Google.Protobuf.TestProtos.TestSparseEnum.Unspecified;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestSparseEnum SparseEnum {
       get { return sparseEnum_; }
       set {
@@ -5089,11 +5417,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as SparseEnumMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(SparseEnumMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5106,6 +5436,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (SparseEnum != global::Google.Protobuf.TestProtos.TestSparseEnum.Unspecified) hash ^= SparseEnum.GetHashCode();
@@ -5116,11 +5447,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5137,6 +5470,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (SparseEnum != global::Google.Protobuf.TestProtos.TestSparseEnum.Unspecified) {
         output.WriteRawTag(8);
@@ -5149,6 +5483,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (SparseEnum != global::Google.Protobuf.TestProtos.TestSparseEnum.Unspecified) {
@@ -5161,6 +5496,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(SparseEnumMessage other) {
       if (other == null) {
         return;
@@ -5172,6 +5508,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5193,6 +5530,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5222,19 +5560,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<OneString> _parser = new pb::MessageParser<OneString>(() => new OneString());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<OneString> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[14]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneString() {
       OnConstruction();
     }
@@ -5242,12 +5584,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneString(OneString other) : this() {
       data_ = other.data_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneString Clone() {
       return new OneString(this);
     }
@@ -5256,6 +5600,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DataFieldNumber = 1;
     private string data_ = "";
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Data {
       get { return data_; }
       set {
@@ -5264,11 +5609,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as OneString);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(OneString other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5281,6 +5628,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Data.Length != 0) hash ^= Data.GetHashCode();
@@ -5291,11 +5639,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5312,6 +5662,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Data.Length != 0) {
         output.WriteRawTag(10);
@@ -5324,6 +5675,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Data.Length != 0) {
@@ -5336,6 +5688,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(OneString other) {
       if (other == null) {
         return;
@@ -5347,6 +5700,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5368,6 +5722,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5394,19 +5749,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<MoreString> _parser = new pb::MessageParser<MoreString>(() => new MoreString());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MoreString> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[15]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreString() {
       OnConstruction();
     }
@@ -5414,12 +5773,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreString(MoreString other) : this() {
       data_ = other.data_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreString Clone() {
       return new MoreString(this);
     }
@@ -5430,16 +5791,19 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForString(10);
     private readonly pbc::RepeatedField<string> data_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> Data {
       get { return data_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MoreString);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MoreString other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5452,6 +5816,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= data_.GetHashCode();
@@ -5462,11 +5827,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5480,6 +5847,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       data_.WriteTo(ref output, _repeated_data_codec);
       if (_unknownFields != null) {
@@ -5489,6 +5857,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += data_.CalculateSize(_repeated_data_codec);
@@ -5499,6 +5868,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MoreString other) {
       if (other == null) {
         return;
@@ -5508,6 +5878,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5529,6 +5900,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5555,19 +5927,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<OneBytes> _parser = new pb::MessageParser<OneBytes>(() => new OneBytes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<OneBytes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[16]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneBytes() {
       OnConstruction();
     }
@@ -5575,12 +5951,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneBytes(OneBytes other) : this() {
       data_ = other.data_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneBytes Clone() {
       return new OneBytes(this);
     }
@@ -5589,6 +5967,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DataFieldNumber = 1;
     private pb::ByteString data_ = pb::ByteString.Empty;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString Data {
       get { return data_; }
       set {
@@ -5597,11 +5976,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as OneBytes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(OneBytes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5614,6 +5995,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Data.Length != 0) hash ^= Data.GetHashCode();
@@ -5624,11 +6006,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5645,6 +6029,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Data.Length != 0) {
         output.WriteRawTag(10);
@@ -5657,6 +6042,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Data.Length != 0) {
@@ -5669,6 +6055,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(OneBytes other) {
       if (other == null) {
         return;
@@ -5680,6 +6067,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5701,6 +6089,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5727,19 +6116,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<MoreBytes> _parser = new pb::MessageParser<MoreBytes>(() => new MoreBytes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MoreBytes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[17]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreBytes() {
       OnConstruction();
     }
@@ -5747,12 +6140,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreBytes(MoreBytes other) : this() {
       data_ = other.data_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MoreBytes Clone() {
       return new MoreBytes(this);
     }
@@ -5761,6 +6156,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DataFieldNumber = 1;
     private pb::ByteString data_ = pb::ByteString.Empty;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString Data {
       get { return data_; }
       set {
@@ -5769,11 +6165,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MoreBytes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MoreBytes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5786,6 +6184,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Data.Length != 0) hash ^= Data.GetHashCode();
@@ -5796,11 +6195,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5817,6 +6218,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Data.Length != 0) {
         output.WriteRawTag(10);
@@ -5829,6 +6231,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Data.Length != 0) {
@@ -5841,6 +6244,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MoreBytes other) {
       if (other == null) {
         return;
@@ -5852,6 +6256,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5873,6 +6278,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5902,19 +6308,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<Int32Message> _parser = new pb::MessageParser<Int32Message>(() => new Int32Message());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Int32Message> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[18]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int32Message() {
       OnConstruction();
     }
@@ -5922,12 +6332,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int32Message(Int32Message other) : this() {
       data_ = other.data_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int32Message Clone() {
       return new Int32Message(this);
     }
@@ -5936,6 +6348,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DataFieldNumber = 1;
     private int data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Data {
       get { return data_; }
       set {
@@ -5944,11 +6357,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Int32Message);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Int32Message other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5961,6 +6376,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Data != 0) hash ^= Data.GetHashCode();
@@ -5971,11 +6387,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5992,6 +6410,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Data != 0) {
         output.WriteRawTag(8);
@@ -6004,6 +6423,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Data != 0) {
@@ -6016,6 +6436,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Int32Message other) {
       if (other == null) {
         return;
@@ -6027,6 +6448,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6048,6 +6470,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6074,19 +6497,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<Uint32Message> _parser = new pb::MessageParser<Uint32Message>(() => new Uint32Message());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Uint32Message> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[19]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint32Message() {
       OnConstruction();
     }
@@ -6094,12 +6521,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint32Message(Uint32Message other) : this() {
       data_ = other.data_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint32Message Clone() {
       return new Uint32Message(this);
     }
@@ -6108,6 +6537,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DataFieldNumber = 1;
     private uint data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint Data {
       get { return data_; }
       set {
@@ -6116,11 +6546,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Uint32Message);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Uint32Message other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6133,6 +6565,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Data != 0) hash ^= Data.GetHashCode();
@@ -6143,11 +6576,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6164,6 +6599,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Data != 0) {
         output.WriteRawTag(8);
@@ -6176,6 +6612,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Data != 0) {
@@ -6188,6 +6625,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Uint32Message other) {
       if (other == null) {
         return;
@@ -6199,6 +6637,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6220,6 +6659,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6246,19 +6686,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<Int64Message> _parser = new pb::MessageParser<Int64Message>(() => new Int64Message());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Int64Message> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[20]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int64Message() {
       OnConstruction();
     }
@@ -6266,12 +6710,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int64Message(Int64Message other) : this() {
       data_ = other.data_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int64Message Clone() {
       return new Int64Message(this);
     }
@@ -6280,6 +6726,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DataFieldNumber = 1;
     private long data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Data {
       get { return data_; }
       set {
@@ -6288,11 +6735,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Int64Message);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Int64Message other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6305,6 +6754,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Data != 0L) hash ^= Data.GetHashCode();
@@ -6315,11 +6765,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6336,6 +6788,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Data != 0L) {
         output.WriteRawTag(8);
@@ -6348,6 +6801,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Data != 0L) {
@@ -6360,6 +6814,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Int64Message other) {
       if (other == null) {
         return;
@@ -6371,6 +6826,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6392,6 +6848,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6418,19 +6875,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<Uint64Message> _parser = new pb::MessageParser<Uint64Message>(() => new Uint64Message());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Uint64Message> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[21]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint64Message() {
       OnConstruction();
     }
@@ -6438,12 +6899,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint64Message(Uint64Message other) : this() {
       data_ = other.data_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Uint64Message Clone() {
       return new Uint64Message(this);
     }
@@ -6452,6 +6915,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DataFieldNumber = 1;
     private ulong data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong Data {
       get { return data_; }
       set {
@@ -6460,11 +6924,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Uint64Message);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Uint64Message other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6477,6 +6943,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Data != 0UL) hash ^= Data.GetHashCode();
@@ -6487,11 +6954,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6508,6 +6977,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Data != 0UL) {
         output.WriteRawTag(8);
@@ -6520,6 +6990,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Data != 0UL) {
@@ -6532,6 +7003,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Uint64Message other) {
       if (other == null) {
         return;
@@ -6543,6 +7015,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6564,6 +7037,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6590,19 +7064,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<BoolMessage> _parser = new pb::MessageParser<BoolMessage>(() => new BoolMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<BoolMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[22]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BoolMessage() {
       OnConstruction();
     }
@@ -6610,12 +7088,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BoolMessage(BoolMessage other) : this() {
       data_ = other.data_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BoolMessage Clone() {
       return new BoolMessage(this);
     }
@@ -6624,6 +7104,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DataFieldNumber = 1;
     private bool data_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Data {
       get { return data_; }
       set {
@@ -6632,11 +7113,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as BoolMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(BoolMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6649,6 +7132,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Data != false) hash ^= Data.GetHashCode();
@@ -6659,11 +7143,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6680,6 +7166,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Data != false) {
         output.WriteRawTag(8);
@@ -6692,6 +7179,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Data != false) {
@@ -6704,6 +7192,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(BoolMessage other) {
       if (other == null) {
         return;
@@ -6715,6 +7204,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6736,6 +7226,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6765,19 +7256,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestOneof> _parser = new pb::MessageParser<TestOneof>(() => new TestOneof());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestOneof> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[23]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneof() {
       OnConstruction();
     }
@@ -6785,6 +7280,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneof(TestOneof other) : this() {
       switch (other.FooCase) {
         case FooOneofCase.FooInt:
@@ -6802,6 +7298,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestOneof Clone() {
       return new TestOneof(this);
     }
@@ -6809,6 +7306,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "foo_int" field.</summary>
     public const int FooIntFieldNumber = 1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int FooInt {
       get { return fooCase_ == FooOneofCase.FooInt ? (int) foo_ : 0; }
       set {
@@ -6820,6 +7318,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "foo_string" field.</summary>
     public const int FooStringFieldNumber = 2;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string FooString {
       get { return fooCase_ == FooOneofCase.FooString ? (string) foo_ : ""; }
       set {
@@ -6831,6 +7330,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "foo_message" field.</summary>
     public const int FooMessageFieldNumber = 3;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.TestProtos.TestAllTypes FooMessage {
       get { return fooCase_ == FooOneofCase.FooMessage ? (global::Google.Protobuf.TestProtos.TestAllTypes) foo_ : null; }
       set {
@@ -6849,22 +7349,26 @@ namespace Google.Protobuf.TestProtos {
     }
     private FooOneofCase fooCase_ = FooOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooOneofCase FooCase {
       get { return fooCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFoo() {
       fooCase_ = FooOneofCase.None;
       foo_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestOneof);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestOneof other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6880,6 +7384,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (fooCase_ == FooOneofCase.FooInt) hash ^= FooInt.GetHashCode();
@@ -6893,11 +7398,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6922,6 +7429,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (fooCase_ == FooOneofCase.FooInt) {
         output.WriteRawTag(8);
@@ -6942,6 +7450,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (fooCase_ == FooOneofCase.FooInt) {
@@ -6960,6 +7469,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestOneof other) {
       if (other == null) {
         return;
@@ -6983,6 +7493,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -7017,6 +7528,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -7056,19 +7568,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestPackedTypes> _parser = new pb::MessageParser<TestPackedTypes>(() => new TestPackedTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestPackedTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[24]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestPackedTypes() {
       OnConstruction();
     }
@@ -7076,6 +7592,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestPackedTypes(TestPackedTypes other) : this() {
       packedInt32_ = other.packedInt32_.Clone();
       packedInt64_ = other.packedInt64_.Clone();
@@ -7095,6 +7612,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestPackedTypes Clone() {
       return new TestPackedTypes(this);
     }
@@ -7105,6 +7623,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForInt32(722);
     private readonly pbc::RepeatedField<int> packedInt32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedInt32 {
       get { return packedInt32_; }
     }
@@ -7115,6 +7634,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForInt64(730);
     private readonly pbc::RepeatedField<long> packedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedInt64 {
       get { return packedInt64_; }
     }
@@ -7125,6 +7645,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForUInt32(738);
     private readonly pbc::RepeatedField<uint> packedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> PackedUint32 {
       get { return packedUint32_; }
     }
@@ -7135,6 +7656,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForUInt64(746);
     private readonly pbc::RepeatedField<ulong> packedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> PackedUint64 {
       get { return packedUint64_; }
     }
@@ -7145,6 +7667,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSInt32(754);
     private readonly pbc::RepeatedField<int> packedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedSint32 {
       get { return packedSint32_; }
     }
@@ -7155,6 +7678,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSInt64(762);
     private readonly pbc::RepeatedField<long> packedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedSint64 {
       get { return packedSint64_; }
     }
@@ -7165,6 +7689,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForFixed32(770);
     private readonly pbc::RepeatedField<uint> packedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> PackedFixed32 {
       get { return packedFixed32_; }
     }
@@ -7175,6 +7700,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForFixed64(778);
     private readonly pbc::RepeatedField<ulong> packedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> PackedFixed64 {
       get { return packedFixed64_; }
     }
@@ -7185,6 +7711,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSFixed32(786);
     private readonly pbc::RepeatedField<int> packedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PackedSfixed32 {
       get { return packedSfixed32_; }
     }
@@ -7195,6 +7722,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSFixed64(794);
     private readonly pbc::RepeatedField<long> packedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> PackedSfixed64 {
       get { return packedSfixed64_; }
     }
@@ -7205,6 +7733,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForFloat(802);
     private readonly pbc::RepeatedField<float> packedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> PackedFloat {
       get { return packedFloat_; }
     }
@@ -7215,6 +7744,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForDouble(810);
     private readonly pbc::RepeatedField<double> packedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> PackedDouble {
       get { return packedDouble_; }
     }
@@ -7225,6 +7755,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForBool(818);
     private readonly pbc::RepeatedField<bool> packedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> PackedBool {
       get { return packedBool_; }
     }
@@ -7235,16 +7766,19 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForEnum(826, x => (int) x, x => (global::Google.Protobuf.TestProtos.ForeignEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum> packedEnum_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum> PackedEnum {
       get { return packedEnum_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestPackedTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestPackedTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -7270,6 +7804,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= packedInt32_.GetHashCode();
@@ -7293,11 +7828,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -7324,6 +7861,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       packedInt32_.WriteTo(ref output, _repeated_packedInt32_codec);
       packedInt64_.WriteTo(ref output, _repeated_packedInt64_codec);
@@ -7346,6 +7884,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += packedInt32_.CalculateSize(_repeated_packedInt32_codec);
@@ -7369,6 +7908,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestPackedTypes other) {
       if (other == null) {
         return;
@@ -7391,6 +7931,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -7478,6 +8019,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -7574,19 +8116,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestUnpackedTypes> _parser = new pb::MessageParser<TestUnpackedTypes>(() => new TestUnpackedTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestUnpackedTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[25]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestUnpackedTypes() {
       OnConstruction();
     }
@@ -7594,6 +8140,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestUnpackedTypes(TestUnpackedTypes other) : this() {
       unpackedInt32_ = other.unpackedInt32_.Clone();
       unpackedInt64_ = other.unpackedInt64_.Clone();
@@ -7613,6 +8160,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestUnpackedTypes Clone() {
       return new TestUnpackedTypes(this);
     }
@@ -7623,6 +8171,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForInt32(720);
     private readonly pbc::RepeatedField<int> unpackedInt32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedInt32 {
       get { return unpackedInt32_; }
     }
@@ -7633,6 +8182,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForInt64(728);
     private readonly pbc::RepeatedField<long> unpackedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedInt64 {
       get { return unpackedInt64_; }
     }
@@ -7643,6 +8193,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForUInt32(736);
     private readonly pbc::RepeatedField<uint> unpackedUint32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> UnpackedUint32 {
       get { return unpackedUint32_; }
     }
@@ -7653,6 +8204,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForUInt64(744);
     private readonly pbc::RepeatedField<ulong> unpackedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> UnpackedUint64 {
       get { return unpackedUint64_; }
     }
@@ -7663,6 +8215,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSInt32(752);
     private readonly pbc::RepeatedField<int> unpackedSint32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedSint32 {
       get { return unpackedSint32_; }
     }
@@ -7673,6 +8226,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSInt64(760);
     private readonly pbc::RepeatedField<long> unpackedSint64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedSint64 {
       get { return unpackedSint64_; }
     }
@@ -7683,6 +8237,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForFixed32(773);
     private readonly pbc::RepeatedField<uint> unpackedFixed32_ = new pbc::RepeatedField<uint>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> UnpackedFixed32 {
       get { return unpackedFixed32_; }
     }
@@ -7693,6 +8248,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForFixed64(777);
     private readonly pbc::RepeatedField<ulong> unpackedFixed64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> UnpackedFixed64 {
       get { return unpackedFixed64_; }
     }
@@ -7703,6 +8259,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSFixed32(789);
     private readonly pbc::RepeatedField<int> unpackedSfixed32_ = new pbc::RepeatedField<int>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> UnpackedSfixed32 {
       get { return unpackedSfixed32_; }
     }
@@ -7713,6 +8270,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForSFixed64(793);
     private readonly pbc::RepeatedField<long> unpackedSfixed64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> UnpackedSfixed64 {
       get { return unpackedSfixed64_; }
     }
@@ -7723,6 +8281,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForFloat(805);
     private readonly pbc::RepeatedField<float> unpackedFloat_ = new pbc::RepeatedField<float>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> UnpackedFloat {
       get { return unpackedFloat_; }
     }
@@ -7733,6 +8292,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForDouble(809);
     private readonly pbc::RepeatedField<double> unpackedDouble_ = new pbc::RepeatedField<double>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double> UnpackedDouble {
       get { return unpackedDouble_; }
     }
@@ -7743,6 +8303,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForBool(816);
     private readonly pbc::RepeatedField<bool> unpackedBool_ = new pbc::RepeatedField<bool>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool> UnpackedBool {
       get { return unpackedBool_; }
     }
@@ -7753,16 +8314,19 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForEnum(824, x => (int) x, x => (global::Google.Protobuf.TestProtos.ForeignEnum) x);
     private readonly pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum> unpackedEnum_ = new pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.TestProtos.ForeignEnum> UnpackedEnum {
       get { return unpackedEnum_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestUnpackedTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestUnpackedTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -7788,6 +8352,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= unpackedInt32_.GetHashCode();
@@ -7811,11 +8376,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -7842,6 +8409,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       unpackedInt32_.WriteTo(ref output, _repeated_unpackedInt32_codec);
       unpackedInt64_.WriteTo(ref output, _repeated_unpackedInt64_codec);
@@ -7864,6 +8432,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += unpackedInt32_.CalculateSize(_repeated_unpackedInt32_codec);
@@ -7887,6 +8456,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestUnpackedTypes other) {
       if (other == null) {
         return;
@@ -7909,6 +8479,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -7996,6 +8567,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -8088,19 +8660,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestRepeatedScalarDifferentTagSizes> _parser = new pb::MessageParser<TestRepeatedScalarDifferentTagSizes>(() => new TestRepeatedScalarDifferentTagSizes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestRepeatedScalarDifferentTagSizes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[26]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRepeatedScalarDifferentTagSizes() {
       OnConstruction();
     }
@@ -8108,6 +8684,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRepeatedScalarDifferentTagSizes(TestRepeatedScalarDifferentTagSizes other) : this() {
       repeatedFixed32_ = other.repeatedFixed32_.Clone();
       repeatedInt32_ = other.repeatedInt32_.Clone();
@@ -8119,6 +8696,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestRepeatedScalarDifferentTagSizes Clone() {
       return new TestRepeatedScalarDifferentTagSizes(this);
     }
@@ -8134,6 +8712,7 @@ namespace Google.Protobuf.TestProtos {
     /// in TestAllTypes didn't trigger the check.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint> RepeatedFixed32 {
       get { return repeatedFixed32_; }
     }
@@ -8147,6 +8726,7 @@ namespace Google.Protobuf.TestProtos {
     /// Check for a varint type, just for good measure.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> RepeatedInt32 {
       get { return repeatedInt32_; }
     }
@@ -8160,6 +8740,7 @@ namespace Google.Protobuf.TestProtos {
     /// These have two-byte tags.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedFixed64 {
       get { return repeatedFixed64_; }
     }
@@ -8170,6 +8751,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForInt64(16378);
     private readonly pbc::RepeatedField<long> repeatedInt64_ = new pbc::RepeatedField<long>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long> RepeatedInt64 {
       get { return repeatedInt64_; }
     }
@@ -8183,6 +8765,7 @@ namespace Google.Protobuf.TestProtos {
     /// Three byte tags.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float> RepeatedFloat {
       get { return repeatedFloat_; }
     }
@@ -8193,16 +8776,19 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForUInt64(2097146);
     private readonly pbc::RepeatedField<ulong> repeatedUint64_ = new pbc::RepeatedField<ulong>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong> RepeatedUint64 {
       get { return repeatedUint64_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestRepeatedScalarDifferentTagSizes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestRepeatedScalarDifferentTagSizes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -8220,6 +8806,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= repeatedFixed32_.GetHashCode();
@@ -8235,11 +8822,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -8258,6 +8847,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       repeatedFixed32_.WriteTo(ref output, _repeated_repeatedFixed32_codec);
       repeatedInt32_.WriteTo(ref output, _repeated_repeatedInt32_codec);
@@ -8272,6 +8862,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += repeatedFixed32_.CalculateSize(_repeated_repeatedFixed32_codec);
@@ -8287,6 +8878,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestRepeatedScalarDifferentTagSizes other) {
       if (other == null) {
         return;
@@ -8301,6 +8893,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -8348,6 +8941,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -8400,19 +8994,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestCommentInjectionMessage> _parser = new pb::MessageParser<TestCommentInjectionMessage>(() => new TestCommentInjectionMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestCommentInjectionMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[27]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCommentInjectionMessage() {
       OnConstruction();
     }
@@ -8420,12 +9018,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCommentInjectionMessage(TestCommentInjectionMessage other) : this() {
       a_ = other.a_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestCommentInjectionMessage Clone() {
       return new TestCommentInjectionMessage(this);
     }
@@ -8437,6 +9037,7 @@ namespace Google.Protobuf.TestProtos {
     /// */ &lt;- This should not close the generated doc comment
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string A {
       get { return a_; }
       set {
@@ -8445,11 +9046,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestCommentInjectionMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestCommentInjectionMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -8462,6 +9065,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (A.Length != 0) hash ^= A.GetHashCode();
@@ -8472,11 +9076,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -8493,6 +9099,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (A.Length != 0) {
         output.WriteRawTag(10);
@@ -8505,6 +9112,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (A.Length != 0) {
@@ -8517,6 +9125,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestCommentInjectionMessage other) {
       if (other == null) {
         return;
@@ -8528,6 +9137,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -8549,6 +9159,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -8578,19 +9189,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<FooRequest> _parser = new pb::MessageParser<FooRequest>(() => new FooRequest());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FooRequest> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[28]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooRequest() {
       OnConstruction();
     }
@@ -8598,21 +9213,25 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooRequest(FooRequest other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooRequest Clone() {
       return new FooRequest(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FooRequest);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FooRequest other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -8624,6 +9243,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -8633,11 +9253,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -8650,6 +9272,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -8658,6 +9281,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -8667,6 +9291,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FooRequest other) {
       if (other == null) {
         return;
@@ -8675,6 +9300,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -8692,6 +9318,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -8714,19 +9341,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<FooResponse> _parser = new pb::MessageParser<FooResponse>(() => new FooResponse());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FooResponse> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[29]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooResponse() {
       OnConstruction();
     }
@@ -8734,21 +9365,25 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooResponse(FooResponse other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooResponse Clone() {
       return new FooResponse(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FooResponse);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FooResponse other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -8760,6 +9395,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -8769,11 +9405,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -8786,6 +9424,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -8794,6 +9433,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -8803,6 +9443,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FooResponse other) {
       if (other == null) {
         return;
@@ -8811,6 +9452,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -8828,6 +9470,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -8850,19 +9493,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<FooClientMessage> _parser = new pb::MessageParser<FooClientMessage>(() => new FooClientMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FooClientMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[30]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooClientMessage() {
       OnConstruction();
     }
@@ -8870,21 +9517,25 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooClientMessage(FooClientMessage other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooClientMessage Clone() {
       return new FooClientMessage(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FooClientMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FooClientMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -8896,6 +9547,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -8905,11 +9557,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -8922,6 +9576,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -8930,6 +9585,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -8939,6 +9595,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FooClientMessage other) {
       if (other == null) {
         return;
@@ -8947,6 +9604,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -8964,6 +9622,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -8986,19 +9645,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<FooServerMessage> _parser = new pb::MessageParser<FooServerMessage>(() => new FooServerMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FooServerMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[31]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooServerMessage() {
       OnConstruction();
     }
@@ -9006,21 +9669,25 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooServerMessage(FooServerMessage other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooServerMessage Clone() {
       return new FooServerMessage(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FooServerMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FooServerMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -9032,6 +9699,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -9041,11 +9709,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -9058,6 +9728,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -9066,6 +9737,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -9075,6 +9747,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FooServerMessage other) {
       if (other == null) {
         return;
@@ -9083,6 +9756,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -9100,6 +9774,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -9122,19 +9797,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<BarRequest> _parser = new pb::MessageParser<BarRequest>(() => new BarRequest());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<BarRequest> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[32]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarRequest() {
       OnConstruction();
     }
@@ -9142,21 +9821,25 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarRequest(BarRequest other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarRequest Clone() {
       return new BarRequest(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as BarRequest);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(BarRequest other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -9168,6 +9851,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -9177,11 +9861,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -9194,6 +9880,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -9202,6 +9889,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -9211,6 +9899,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(BarRequest other) {
       if (other == null) {
         return;
@@ -9219,6 +9908,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -9236,6 +9926,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -9258,19 +9949,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<BarResponse> _parser = new pb::MessageParser<BarResponse>(() => new BarResponse());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<BarResponse> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[33]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarResponse() {
       OnConstruction();
     }
@@ -9278,21 +9973,25 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarResponse(BarResponse other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BarResponse Clone() {
       return new BarResponse(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as BarResponse);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(BarResponse other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -9304,6 +10003,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -9313,11 +10013,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -9330,6 +10032,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -9338,6 +10041,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -9347,6 +10051,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(BarResponse other) {
       if (other == null) {
         return;
@@ -9355,6 +10060,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -9372,6 +10078,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -9394,19 +10101,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestEmptyMessage> _parser = new pb::MessageParser<TestEmptyMessage>(() => new TestEmptyMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestEmptyMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[34]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEmptyMessage() {
       OnConstruction();
     }
@@ -9414,21 +10125,25 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEmptyMessage(TestEmptyMessage other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestEmptyMessage Clone() {
       return new TestEmptyMessage(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestEmptyMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestEmptyMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -9440,6 +10155,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -9449,11 +10165,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -9466,6 +10184,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -9474,6 +10193,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -9483,6 +10203,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestEmptyMessage other) {
       if (other == null) {
         return;
@@ -9491,6 +10212,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -9508,6 +10230,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -9533,19 +10256,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<CommentMessage> _parser = new pb::MessageParser<CommentMessage>(() => new CommentMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<CommentMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestProto3Reflection.Descriptor.MessageTypes[35]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CommentMessage() {
       OnConstruction();
     }
@@ -9553,12 +10280,14 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CommentMessage(CommentMessage other) : this() {
       text_ = other.text_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public CommentMessage Clone() {
       return new CommentMessage(this);
     }
@@ -9570,6 +10299,7 @@ namespace Google.Protobuf.TestProtos {
     /// Leading field comment
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Text {
       get { return text_; }
       set {
@@ -9578,11 +10308,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as CommentMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(CommentMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -9595,6 +10327,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Text.Length != 0) hash ^= Text.GetHashCode();
@@ -9605,11 +10338,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -9626,6 +10361,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Text.Length != 0) {
         output.WriteRawTag(10);
@@ -9638,6 +10374,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Text.Length != 0) {
@@ -9650,6 +10387,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(CommentMessage other) {
       if (other == null) {
         return;
@@ -9661,6 +10399,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -9682,6 +10421,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -9701,6 +10441,7 @@ namespace Google.Protobuf.TestProtos {
     #region Nested types
     /// <summary>Container for nested types declared in the CommentMessage message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       /// <summary>
       /// Leading nested enum comment
@@ -9723,19 +10464,23 @@ namespace Google.Protobuf.TestProtos {
         private static readonly pb::MessageParser<NestedCommentMessage> _parser = new pb::MessageParser<NestedCommentMessage>(() => new NestedCommentMessage());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedCommentMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.TestProtos.CommentMessage.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedCommentMessage() {
           OnConstruction();
         }
@@ -9743,12 +10488,14 @@ namespace Google.Protobuf.TestProtos {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedCommentMessage(NestedCommentMessage other) : this() {
           nestedText_ = other.nestedText_;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedCommentMessage Clone() {
           return new NestedCommentMessage(this);
         }
@@ -9760,6 +10507,7 @@ namespace Google.Protobuf.TestProtos {
         /// Leading nested message field comment
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string NestedText {
           get { return nestedText_; }
           set {
@@ -9768,11 +10516,13 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedCommentMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedCommentMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -9785,6 +10535,7 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (NestedText.Length != 0) hash ^= NestedText.GetHashCode();
@@ -9795,11 +10546,13 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -9816,6 +10569,7 @@ namespace Google.Protobuf.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (NestedText.Length != 0) {
             output.WriteRawTag(10);
@@ -9828,6 +10582,7 @@ namespace Google.Protobuf.TestProtos {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (NestedText.Length != 0) {
@@ -9840,6 +10595,7 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedCommentMessage other) {
           if (other == null) {
             return;
@@ -9851,6 +10607,7 @@ namespace Google.Protobuf.TestProtos {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -9872,6 +10629,7 @@ namespace Google.Protobuf.TestProtos {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3Optional.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3Optional.cs
index b56c99efea..a41b890fc6 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3Optional.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestProto3Optional.cs
@@ -88,19 +88,23 @@ namespace ProtobufUnittest {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestProto3Optional> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::ProtobufUnittest.UnittestProto3OptionalReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestProto3Optional() {
       OnConstruction();
     }
@@ -108,6 +112,7 @@ namespace ProtobufUnittest {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestProto3Optional(TestProto3Optional other) : this() {
       _hasBits0 = other._hasBits0;
       optionalInt32_ = other.optionalInt32_;
@@ -135,6 +140,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestProto3Optional Clone() {
       return new TestProto3Optional(this);
     }
@@ -146,6 +152,7 @@ namespace ProtobufUnittest {
     /// Singular
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalInt32 {
       get { if ((_hasBits0 & 1) != 0) { return optionalInt32_; } else { return 0; } }
       set {
@@ -155,11 +162,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_int32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalInt32 {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "optional_int32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalInt32() {
       _hasBits0 &= ~1;
     }
@@ -168,6 +177,7 @@ namespace ProtobufUnittest {
     public const int OptionalInt64FieldNumber = 2;
     private long optionalInt64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalInt64 {
       get { if ((_hasBits0 & 2) != 0) { return optionalInt64_; } else { return 0L; } }
       set {
@@ -177,11 +187,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_int64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalInt64 {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "optional_int64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalInt64() {
       _hasBits0 &= ~2;
     }
@@ -190,6 +202,7 @@ namespace ProtobufUnittest {
     public const int OptionalUint32FieldNumber = 3;
     private uint optionalUint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OptionalUint32 {
       get { if ((_hasBits0 & 4) != 0) { return optionalUint32_; } else { return 0; } }
       set {
@@ -199,11 +212,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_uint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalUint32 {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "optional_uint32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalUint32() {
       _hasBits0 &= ~4;
     }
@@ -212,6 +227,7 @@ namespace ProtobufUnittest {
     public const int OptionalUint64FieldNumber = 4;
     private ulong optionalUint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong OptionalUint64 {
       get { if ((_hasBits0 & 8) != 0) { return optionalUint64_; } else { return 0UL; } }
       set {
@@ -221,11 +237,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_uint64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalUint64 {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "optional_uint64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalUint64() {
       _hasBits0 &= ~8;
     }
@@ -234,6 +252,7 @@ namespace ProtobufUnittest {
     public const int OptionalSint32FieldNumber = 5;
     private int optionalSint32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalSint32 {
       get { if ((_hasBits0 & 16) != 0) { return optionalSint32_; } else { return 0; } }
       set {
@@ -243,11 +262,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_sint32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSint32 {
       get { return (_hasBits0 & 16) != 0; }
     }
     /// <summary>Clears the value of the "optional_sint32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSint32() {
       _hasBits0 &= ~16;
     }
@@ -256,6 +277,7 @@ namespace ProtobufUnittest {
     public const int OptionalSint64FieldNumber = 6;
     private long optionalSint64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalSint64 {
       get { if ((_hasBits0 & 32) != 0) { return optionalSint64_; } else { return 0L; } }
       set {
@@ -265,11 +287,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_sint64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSint64 {
       get { return (_hasBits0 & 32) != 0; }
     }
     /// <summary>Clears the value of the "optional_sint64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSint64() {
       _hasBits0 &= ~32;
     }
@@ -278,6 +302,7 @@ namespace ProtobufUnittest {
     public const int OptionalFixed32FieldNumber = 7;
     private uint optionalFixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint OptionalFixed32 {
       get { if ((_hasBits0 & 64) != 0) { return optionalFixed32_; } else { return 0; } }
       set {
@@ -287,11 +312,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_fixed32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalFixed32 {
       get { return (_hasBits0 & 64) != 0; }
     }
     /// <summary>Clears the value of the "optional_fixed32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalFixed32() {
       _hasBits0 &= ~64;
     }
@@ -300,6 +327,7 @@ namespace ProtobufUnittest {
     public const int OptionalFixed64FieldNumber = 8;
     private ulong optionalFixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong OptionalFixed64 {
       get { if ((_hasBits0 & 128) != 0) { return optionalFixed64_; } else { return 0UL; } }
       set {
@@ -309,11 +337,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_fixed64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalFixed64 {
       get { return (_hasBits0 & 128) != 0; }
     }
     /// <summary>Clears the value of the "optional_fixed64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalFixed64() {
       _hasBits0 &= ~128;
     }
@@ -322,6 +352,7 @@ namespace ProtobufUnittest {
     public const int OptionalSfixed32FieldNumber = 9;
     private int optionalSfixed32_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OptionalSfixed32 {
       get { if ((_hasBits0 & 256) != 0) { return optionalSfixed32_; } else { return 0; } }
       set {
@@ -331,11 +362,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_sfixed32" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSfixed32 {
       get { return (_hasBits0 & 256) != 0; }
     }
     /// <summary>Clears the value of the "optional_sfixed32" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSfixed32() {
       _hasBits0 &= ~256;
     }
@@ -344,6 +377,7 @@ namespace ProtobufUnittest {
     public const int OptionalSfixed64FieldNumber = 10;
     private long optionalSfixed64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long OptionalSfixed64 {
       get { if ((_hasBits0 & 512) != 0) { return optionalSfixed64_; } else { return 0L; } }
       set {
@@ -353,11 +387,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_sfixed64" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalSfixed64 {
       get { return (_hasBits0 & 512) != 0; }
     }
     /// <summary>Clears the value of the "optional_sfixed64" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalSfixed64() {
       _hasBits0 &= ~512;
     }
@@ -366,6 +402,7 @@ namespace ProtobufUnittest {
     public const int OptionalFloatFieldNumber = 11;
     private float optionalFloat_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float OptionalFloat {
       get { if ((_hasBits0 & 1024) != 0) { return optionalFloat_; } else { return 0F; } }
       set {
@@ -375,11 +412,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_float" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalFloat {
       get { return (_hasBits0 & 1024) != 0; }
     }
     /// <summary>Clears the value of the "optional_float" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalFloat() {
       _hasBits0 &= ~1024;
     }
@@ -388,6 +427,7 @@ namespace ProtobufUnittest {
     public const int OptionalDoubleFieldNumber = 12;
     private double optionalDouble_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double OptionalDouble {
       get { if ((_hasBits0 & 2048) != 0) { return optionalDouble_; } else { return 0D; } }
       set {
@@ -397,11 +437,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_double" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalDouble {
       get { return (_hasBits0 & 2048) != 0; }
     }
     /// <summary>Clears the value of the "optional_double" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalDouble() {
       _hasBits0 &= ~2048;
     }
@@ -410,6 +452,7 @@ namespace ProtobufUnittest {
     public const int OptionalBoolFieldNumber = 13;
     private bool optionalBool_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool OptionalBool {
       get { if ((_hasBits0 & 4096) != 0) { return optionalBool_; } else { return false; } }
       set {
@@ -419,11 +462,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_bool" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalBool {
       get { return (_hasBits0 & 4096) != 0; }
     }
     /// <summary>Clears the value of the "optional_bool" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalBool() {
       _hasBits0 &= ~4096;
     }
@@ -432,6 +477,7 @@ namespace ProtobufUnittest {
     public const int OptionalStringFieldNumber = 14;
     private string optionalString_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalString {
       get { return optionalString_ ?? ""; }
       set {
@@ -440,11 +486,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_string" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalString {
       get { return optionalString_ != null; }
     }
     /// <summary>Clears the value of the "optional_string" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalString() {
       optionalString_ = null;
     }
@@ -453,6 +501,7 @@ namespace ProtobufUnittest {
     public const int OptionalBytesFieldNumber = 15;
     private pb::ByteString optionalBytes_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString OptionalBytes {
       get { return optionalBytes_ ?? pb::ByteString.Empty; }
       set {
@@ -461,11 +510,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_bytes" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalBytes {
       get { return optionalBytes_ != null; }
     }
     /// <summary>Clears the value of the "optional_bytes" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalBytes() {
       optionalBytes_ = null;
     }
@@ -474,6 +525,7 @@ namespace ProtobufUnittest {
     public const int OptionalCordFieldNumber = 16;
     private string optionalCord_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OptionalCord {
       get { return optionalCord_ ?? ""; }
       set {
@@ -482,11 +534,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_cord" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalCord {
       get { return optionalCord_ != null; }
     }
     /// <summary>Clears the value of the "optional_cord" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalCord() {
       optionalCord_ = null;
     }
@@ -495,6 +549,7 @@ namespace ProtobufUnittest {
     public const int OptionalNestedMessageFieldNumber = 18;
     private global::ProtobufUnittest.TestProto3Optional.Types.NestedMessage optionalNestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufUnittest.TestProto3Optional.Types.NestedMessage OptionalNestedMessage {
       get { return optionalNestedMessage_; }
       set {
@@ -506,6 +561,7 @@ namespace ProtobufUnittest {
     public const int LazyNestedMessageFieldNumber = 19;
     private global::ProtobufUnittest.TestProto3Optional.Types.NestedMessage lazyNestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufUnittest.TestProto3Optional.Types.NestedMessage LazyNestedMessage {
       get { return lazyNestedMessage_; }
       set {
@@ -517,6 +573,7 @@ namespace ProtobufUnittest {
     public const int OptionalNestedEnumFieldNumber = 21;
     private global::ProtobufUnittest.TestProto3Optional.Types.NestedEnum optionalNestedEnum_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufUnittest.TestProto3Optional.Types.NestedEnum OptionalNestedEnum {
       get { if ((_hasBits0 & 8192) != 0) { return optionalNestedEnum_; } else { return global::ProtobufUnittest.TestProto3Optional.Types.NestedEnum.Unspecified; } }
       set {
@@ -526,11 +583,13 @@ namespace ProtobufUnittest {
     }
     /// <summary>Gets whether the "optional_nested_enum" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptionalNestedEnum {
       get { return (_hasBits0 & 8192) != 0; }
     }
     /// <summary>Clears the value of the "optional_nested_enum" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptionalNestedEnum() {
       _hasBits0 &= ~8192;
     }
@@ -542,6 +601,7 @@ namespace ProtobufUnittest {
     /// Add some non-optional fields to verify we can mix them.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int SingularInt32 {
       get { return singularInt32_; }
       set {
@@ -553,6 +613,7 @@ namespace ProtobufUnittest {
     public const int SingularInt64FieldNumber = 23;
     private long singularInt64_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long SingularInt64 {
       get { return singularInt64_; }
       set {
@@ -561,11 +622,13 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestProto3Optional);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestProto3Optional other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -598,6 +661,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasOptionalInt32) hash ^= OptionalInt32.GetHashCode();
@@ -628,11 +692,13 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -729,6 +795,7 @@ namespace ProtobufUnittest {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasOptionalInt32) {
         output.WriteRawTag(8);
@@ -821,6 +888,7 @@ namespace ProtobufUnittest {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasOptionalInt32) {
@@ -893,6 +961,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestProto3Optional other) {
       if (other == null) {
         return;
@@ -970,6 +1039,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1077,6 +1147,7 @@ namespace ProtobufUnittest {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1182,6 +1253,7 @@ namespace ProtobufUnittest {
     #region Nested types
     /// <summary>Container for nested types declared in the TestProto3Optional message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum NestedEnum {
         [pbr::OriginalName("UNSPECIFIED")] Unspecified = 0,
@@ -1203,19 +1275,23 @@ namespace ProtobufUnittest {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::ProtobufUnittest.TestProto3Optional.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -1223,6 +1299,7 @@ namespace ProtobufUnittest {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           _hasBits0 = other._hasBits0;
           bb_ = other.bb_;
@@ -1230,6 +1307,7 @@ namespace ProtobufUnittest {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -1243,6 +1321,7 @@ namespace ProtobufUnittest {
         /// This file needs to compile in proto1 to test backwards-compatibility.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Bb {
           get { if ((_hasBits0 & 1) != 0) { return bb_; } else { return 0; } }
           set {
@@ -1252,21 +1331,25 @@ namespace ProtobufUnittest {
         }
         /// <summary>Gets whether the "bb" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasBb {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "bb" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearBb() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -1279,6 +1362,7 @@ namespace ProtobufUnittest {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasBb) hash ^= Bb.GetHashCode();
@@ -1289,11 +1373,13 @@ namespace ProtobufUnittest {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -1310,6 +1396,7 @@ namespace ProtobufUnittest {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasBb) {
             output.WriteRawTag(8);
@@ -1322,6 +1409,7 @@ namespace ProtobufUnittest {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasBb) {
@@ -1334,6 +1422,7 @@ namespace ProtobufUnittest {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -1345,6 +1434,7 @@ namespace ProtobufUnittest {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -1366,6 +1456,7 @@ namespace ProtobufUnittest {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -1397,19 +1488,23 @@ namespace ProtobufUnittest {
     private static readonly pb::MessageParser<TestProto3OptionalMessage> _parser = new pb::MessageParser<TestProto3OptionalMessage>(() => new TestProto3OptionalMessage());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestProto3OptionalMessage> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::ProtobufUnittest.UnittestProto3OptionalReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestProto3OptionalMessage() {
       OnConstruction();
     }
@@ -1417,6 +1512,7 @@ namespace ProtobufUnittest {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestProto3OptionalMessage(TestProto3OptionalMessage other) : this() {
       nestedMessage_ = other.nestedMessage_ != null ? other.nestedMessage_.Clone() : null;
       optionalNestedMessage_ = other.optionalNestedMessage_ != null ? other.optionalNestedMessage_.Clone() : null;
@@ -1424,6 +1520,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestProto3OptionalMessage Clone() {
       return new TestProto3OptionalMessage(this);
     }
@@ -1432,6 +1529,7 @@ namespace ProtobufUnittest {
     public const int NestedMessageFieldNumber = 1;
     private global::ProtobufUnittest.TestProto3OptionalMessage.Types.NestedMessage nestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufUnittest.TestProto3OptionalMessage.Types.NestedMessage NestedMessage {
       get { return nestedMessage_; }
       set {
@@ -1443,6 +1541,7 @@ namespace ProtobufUnittest {
     public const int OptionalNestedMessageFieldNumber = 2;
     private global::ProtobufUnittest.TestProto3OptionalMessage.Types.NestedMessage optionalNestedMessage_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::ProtobufUnittest.TestProto3OptionalMessage.Types.NestedMessage OptionalNestedMessage {
       get { return optionalNestedMessage_; }
       set {
@@ -1451,11 +1550,13 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestProto3OptionalMessage);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestProto3OptionalMessage other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1469,6 +1570,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (nestedMessage_ != null) hash ^= NestedMessage.GetHashCode();
@@ -1480,11 +1582,13 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1505,6 +1609,7 @@ namespace ProtobufUnittest {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (nestedMessage_ != null) {
         output.WriteRawTag(10);
@@ -1521,6 +1626,7 @@ namespace ProtobufUnittest {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (nestedMessage_ != null) {
@@ -1536,6 +1642,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestProto3OptionalMessage other) {
       if (other == null) {
         return;
@@ -1556,6 +1663,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1587,6 +1695,7 @@ namespace ProtobufUnittest {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1616,6 +1725,7 @@ namespace ProtobufUnittest {
     #region Nested types
     /// <summary>Container for nested types declared in the TestProto3OptionalMessage message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class NestedMessage : pb::IMessage<NestedMessage>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -1625,19 +1735,23 @@ namespace ProtobufUnittest {
         private static readonly pb::MessageParser<NestedMessage> _parser = new pb::MessageParser<NestedMessage>(() => new NestedMessage());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NestedMessage> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::ProtobufUnittest.TestProto3OptionalMessage.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage() {
           OnConstruction();
         }
@@ -1645,12 +1759,14 @@ namespace ProtobufUnittest {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage(NestedMessage other) : this() {
           s_ = other.s_;
           _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NestedMessage Clone() {
           return new NestedMessage(this);
         }
@@ -1659,6 +1775,7 @@ namespace ProtobufUnittest {
         public const int SFieldNumber = 1;
         private string s_ = "";
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string S {
           get { return s_; }
           set {
@@ -1667,11 +1784,13 @@ namespace ProtobufUnittest {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NestedMessage);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NestedMessage other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -1684,6 +1803,7 @@ namespace ProtobufUnittest {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (S.Length != 0) hash ^= S.GetHashCode();
@@ -1694,11 +1814,13 @@ namespace ProtobufUnittest {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -1715,6 +1837,7 @@ namespace ProtobufUnittest {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (S.Length != 0) {
             output.WriteRawTag(10);
@@ -1727,6 +1850,7 @@ namespace ProtobufUnittest {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (S.Length != 0) {
@@ -1739,6 +1863,7 @@ namespace ProtobufUnittest {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NestedMessage other) {
           if (other == null) {
             return;
@@ -1750,6 +1875,7 @@ namespace ProtobufUnittest {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -1771,6 +1897,7 @@ namespace ProtobufUnittest {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -1802,19 +1929,23 @@ namespace ProtobufUnittest {
     private static readonly pb::MessageParser<Proto3OptionalExtensions> _parser = new pb::MessageParser<Proto3OptionalExtensions>(() => new Proto3OptionalExtensions());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Proto3OptionalExtensions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::ProtobufUnittest.UnittestProto3OptionalReflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Proto3OptionalExtensions() {
       OnConstruction();
     }
@@ -1822,21 +1953,25 @@ namespace ProtobufUnittest {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Proto3OptionalExtensions(Proto3OptionalExtensions other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Proto3OptionalExtensions Clone() {
       return new Proto3OptionalExtensions(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Proto3OptionalExtensions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Proto3OptionalExtensions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1848,6 +1983,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -1857,11 +1993,13 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1874,6 +2012,7 @@ namespace ProtobufUnittest {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -1882,6 +2021,7 @@ namespace ProtobufUnittest {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -1891,6 +2031,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Proto3OptionalExtensions other) {
       if (other == null) {
         return;
@@ -1899,6 +2040,7 @@ namespace ProtobufUnittest {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1916,6 +2058,7 @@ namespace ProtobufUnittest {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1931,6 +2074,7 @@ namespace ProtobufUnittest {
     #region Extensions
     /// <summary>Container for extensions for other messages declared in the Proto3OptionalExtensions message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Extensions {
       public static readonly pb::Extension<global::Google.Protobuf.Reflection.MessageOptions, int> ExtNoOptional =
         new pb::Extension<global::Google.Protobuf.Reflection.MessageOptions, int>(355886728, pb::FieldCodec.ForInt32(2847093824, 0));
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestSelfreferentialOptions.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestSelfreferentialOptions.cs
index 7ed1580ab2..7a8f72d4bb 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestSelfreferentialOptions.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestSelfreferentialOptions.cs
@@ -74,19 +74,23 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     private pb::ExtensionSet<FooOptions> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FooOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooOptions() {
       OnConstruction();
     }
@@ -94,6 +98,7 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooOptions(FooOptions other) : this() {
       _hasBits0 = other._hasBits0;
       intOpt_ = other.intOpt_;
@@ -103,6 +108,7 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FooOptions Clone() {
       return new FooOptions(this);
     }
@@ -116,6 +122,7 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     /// Custom field option used in definition of the extension message.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int IntOpt {
       get { if ((_hasBits0 & 1) != 0) { return intOpt_; } else { return IntOptDefaultValue; } }
       set {
@@ -125,11 +132,13 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     }
     /// <summary>Gets whether the "int_opt" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasIntOpt {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "int_opt" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearIntOpt() {
       _hasBits0 &= ~1;
     }
@@ -143,6 +152,7 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     /// Custom field option used in definition of the custom option's message.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Foo {
       get { if ((_hasBits0 & 2) != 0) { return foo_; } else { return FooDefaultValue; } }
       set {
@@ -152,21 +162,25 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     }
     /// <summary>Gets whether the "foo" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasFoo {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "foo" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearFoo() {
       _hasBits0 &= ~2;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FooOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FooOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -183,6 +197,7 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasIntOpt) hash ^= IntOpt.GetHashCode();
@@ -197,11 +212,13 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -225,6 +242,7 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasIntOpt) {
         output.WriteRawTag(8);
@@ -244,6 +262,7 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasIntOpt) {
@@ -262,6 +281,7 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FooOptions other) {
       if (other == null) {
         return;
@@ -277,6 +297,7 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -304,6 +325,7 @@ namespace UnitTest.Issues.TestProtos.SelfreferentialOptions {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestWellKnownTypes.cs b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestWellKnownTypes.cs
index 996e928cfd..58e866e766 100644
--- a/csharp/src/Google.Protobuf.Test.TestProtos/UnittestWellKnownTypes.cs
+++ b/csharp/src/Google.Protobuf.Test.TestProtos/UnittestWellKnownTypes.cs
@@ -187,19 +187,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<TestWellKnownTypes> _parser = new pb::MessageParser<TestWellKnownTypes>(() => new TestWellKnownTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<TestWellKnownTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestWellKnownTypesReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestWellKnownTypes() {
       OnConstruction();
     }
@@ -207,6 +211,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestWellKnownTypes(TestWellKnownTypes other) : this() {
       anyField_ = other.anyField_ != null ? other.anyField_.Clone() : null;
       apiField_ = other.apiField_ != null ? other.apiField_.Clone() : null;
@@ -231,6 +236,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public TestWellKnownTypes Clone() {
       return new TestWellKnownTypes(this);
     }
@@ -239,6 +245,7 @@ namespace Google.Protobuf.TestProtos {
     public const int AnyFieldFieldNumber = 1;
     private global::Google.Protobuf.WellKnownTypes.Any anyField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Any AnyField {
       get { return anyField_; }
       set {
@@ -250,6 +257,7 @@ namespace Google.Protobuf.TestProtos {
     public const int ApiFieldFieldNumber = 2;
     private global::Google.Protobuf.WellKnownTypes.Api apiField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Api ApiField {
       get { return apiField_; }
       set {
@@ -261,6 +269,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DurationFieldFieldNumber = 3;
     private global::Google.Protobuf.WellKnownTypes.Duration durationField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Duration DurationField {
       get { return durationField_; }
       set {
@@ -272,6 +281,7 @@ namespace Google.Protobuf.TestProtos {
     public const int EmptyFieldFieldNumber = 4;
     private global::Google.Protobuf.WellKnownTypes.Empty emptyField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Empty EmptyField {
       get { return emptyField_; }
       set {
@@ -283,6 +293,7 @@ namespace Google.Protobuf.TestProtos {
     public const int FieldMaskFieldFieldNumber = 5;
     private global::Google.Protobuf.WellKnownTypes.FieldMask fieldMaskField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.FieldMask FieldMaskField {
       get { return fieldMaskField_; }
       set {
@@ -294,6 +305,7 @@ namespace Google.Protobuf.TestProtos {
     public const int SourceContextFieldFieldNumber = 6;
     private global::Google.Protobuf.WellKnownTypes.SourceContext sourceContextField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.SourceContext SourceContextField {
       get { return sourceContextField_; }
       set {
@@ -305,6 +317,7 @@ namespace Google.Protobuf.TestProtos {
     public const int StructFieldFieldNumber = 7;
     private global::Google.Protobuf.WellKnownTypes.Struct structField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Struct StructField {
       get { return structField_; }
       set {
@@ -316,6 +329,7 @@ namespace Google.Protobuf.TestProtos {
     public const int TimestampFieldFieldNumber = 8;
     private global::Google.Protobuf.WellKnownTypes.Timestamp timestampField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Timestamp TimestampField {
       get { return timestampField_; }
       set {
@@ -327,6 +341,7 @@ namespace Google.Protobuf.TestProtos {
     public const int TypeFieldFieldNumber = 9;
     private global::Google.Protobuf.WellKnownTypes.Type typeField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Type TypeField {
       get { return typeField_; }
       set {
@@ -339,6 +354,7 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::FieldCodec<double?> _single_doubleField_codec = pb::FieldCodec.ForStructWrapper<double>(82);
     private double? doubleField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField {
       get { return doubleField_; }
       set {
@@ -352,6 +368,7 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::FieldCodec<float?> _single_floatField_codec = pb::FieldCodec.ForStructWrapper<float>(90);
     private float? floatField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float? FloatField {
       get { return floatField_; }
       set {
@@ -365,6 +382,7 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::FieldCodec<long?> _single_int64Field_codec = pb::FieldCodec.ForStructWrapper<long>(98);
     private long? int64Field_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field {
       get { return int64Field_; }
       set {
@@ -378,6 +396,7 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::FieldCodec<ulong?> _single_uint64Field_codec = pb::FieldCodec.ForStructWrapper<ulong>(106);
     private ulong? uint64Field_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong? Uint64Field {
       get { return uint64Field_; }
       set {
@@ -391,6 +410,7 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::FieldCodec<int?> _single_int32Field_codec = pb::FieldCodec.ForStructWrapper<int>(114);
     private int? int32Field_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int? Int32Field {
       get { return int32Field_; }
       set {
@@ -404,6 +424,7 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::FieldCodec<uint?> _single_uint32Field_codec = pb::FieldCodec.ForStructWrapper<uint>(122);
     private uint? uint32Field_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint? Uint32Field {
       get { return uint32Field_; }
       set {
@@ -417,6 +438,7 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::FieldCodec<bool?> _single_boolField_codec = pb::FieldCodec.ForStructWrapper<bool>(130);
     private bool? boolField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool? BoolField {
       get { return boolField_; }
       set {
@@ -430,6 +452,7 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::FieldCodec<string> _single_stringField_codec = pb::FieldCodec.ForClassWrapper<string>(138);
     private string stringField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringField {
       get { return stringField_; }
       set {
@@ -443,6 +466,7 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::FieldCodec<pb::ByteString> _single_bytesField_codec = pb::FieldCodec.ForClassWrapper<pb::ByteString>(146);
     private pb::ByteString bytesField_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString BytesField {
       get { return bytesField_; }
       set {
@@ -458,6 +482,7 @@ namespace Google.Protobuf.TestProtos {
     /// Part of struct, but useful to be able to test separately
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Value ValueField {
       get { return valueField_; }
       set {
@@ -466,11 +491,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as TestWellKnownTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(TestWellKnownTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -501,6 +528,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (anyField_ != null) hash ^= AnyField.GetHashCode();
@@ -529,11 +557,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -613,6 +643,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (anyField_ != null) {
         output.WriteRawTag(10);
@@ -688,6 +719,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (anyField_ != null) {
@@ -754,6 +786,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(TestWellKnownTypes other) {
       if (other == null) {
         return;
@@ -867,6 +900,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1017,6 +1051,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1175,19 +1210,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<RepeatedWellKnownTypes> _parser = new pb::MessageParser<RepeatedWellKnownTypes>(() => new RepeatedWellKnownTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<RepeatedWellKnownTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestWellKnownTypesReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public RepeatedWellKnownTypes() {
       OnConstruction();
     }
@@ -1195,6 +1234,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public RepeatedWellKnownTypes(RepeatedWellKnownTypes other) : this() {
       anyField_ = other.anyField_.Clone();
       apiField_ = other.apiField_.Clone();
@@ -1218,6 +1258,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public RepeatedWellKnownTypes Clone() {
       return new RepeatedWellKnownTypes(this);
     }
@@ -1228,6 +1269,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(10, global::Google.Protobuf.WellKnownTypes.Any.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Any> anyField_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Any>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Any> AnyField {
       get { return anyField_; }
     }
@@ -1238,6 +1280,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(18, global::Google.Protobuf.WellKnownTypes.Api.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Api> apiField_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Api>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Api> ApiField {
       get { return apiField_; }
     }
@@ -1248,6 +1291,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(26, global::Google.Protobuf.WellKnownTypes.Duration.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Duration> durationField_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Duration>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Duration> DurationField {
       get { return durationField_; }
     }
@@ -1258,6 +1302,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(34, global::Google.Protobuf.WellKnownTypes.Empty.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Empty> emptyField_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Empty>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Empty> EmptyField {
       get { return emptyField_; }
     }
@@ -1268,6 +1313,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(42, global::Google.Protobuf.WellKnownTypes.FieldMask.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.FieldMask> fieldMaskField_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.FieldMask>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.FieldMask> FieldMaskField {
       get { return fieldMaskField_; }
     }
@@ -1278,6 +1324,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(50, global::Google.Protobuf.WellKnownTypes.SourceContext.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.SourceContext> sourceContextField_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.SourceContext>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.SourceContext> SourceContextField {
       get { return sourceContextField_; }
     }
@@ -1288,6 +1335,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(58, global::Google.Protobuf.WellKnownTypes.Struct.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Struct> structField_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Struct>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Struct> StructField {
       get { return structField_; }
     }
@@ -1298,6 +1346,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(66, global::Google.Protobuf.WellKnownTypes.Timestamp.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Timestamp> timestampField_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Timestamp>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Timestamp> TimestampField {
       get { return timestampField_; }
     }
@@ -1308,6 +1357,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForMessage(74, global::Google.Protobuf.WellKnownTypes.Type.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Type> typeField_ = new pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Type>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Type> TypeField {
       get { return typeField_; }
     }
@@ -1321,6 +1371,7 @@ namespace Google.Protobuf.TestProtos {
     /// These don't actually make a lot of sense, but they're not prohibited...
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<double?> DoubleField {
       get { return doubleField_; }
     }
@@ -1331,6 +1382,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForStructWrapper<float>(90);
     private readonly pbc::RepeatedField<float?> floatField_ = new pbc::RepeatedField<float?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<float?> FloatField {
       get { return floatField_; }
     }
@@ -1341,6 +1393,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForStructWrapper<long>(98);
     private readonly pbc::RepeatedField<long?> int64Field_ = new pbc::RepeatedField<long?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<long?> Int64Field {
       get { return int64Field_; }
     }
@@ -1351,6 +1404,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForStructWrapper<ulong>(106);
     private readonly pbc::RepeatedField<ulong?> uint64Field_ = new pbc::RepeatedField<ulong?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<ulong?> Uint64Field {
       get { return uint64Field_; }
     }
@@ -1361,6 +1415,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForStructWrapper<int>(114);
     private readonly pbc::RepeatedField<int?> int32Field_ = new pbc::RepeatedField<int?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int?> Int32Field {
       get { return int32Field_; }
     }
@@ -1371,6 +1426,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForStructWrapper<uint>(122);
     private readonly pbc::RepeatedField<uint?> uint32Field_ = new pbc::RepeatedField<uint?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<uint?> Uint32Field {
       get { return uint32Field_; }
     }
@@ -1381,6 +1437,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForStructWrapper<bool>(130);
     private readonly pbc::RepeatedField<bool?> boolField_ = new pbc::RepeatedField<bool?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<bool?> BoolField {
       get { return boolField_; }
     }
@@ -1391,6 +1448,7 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForClassWrapper<string>(138);
     private readonly pbc::RepeatedField<string> stringField_ = new pbc::RepeatedField<string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> StringField {
       get { return stringField_; }
     }
@@ -1401,16 +1459,19 @@ namespace Google.Protobuf.TestProtos {
         = pb::FieldCodec.ForClassWrapper<pb::ByteString>(146);
     private readonly pbc::RepeatedField<pb::ByteString> bytesField_ = new pbc::RepeatedField<pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<pb::ByteString> BytesField {
       get { return bytesField_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as RepeatedWellKnownTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(RepeatedWellKnownTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1440,6 +1501,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= anyField_.GetHashCode();
@@ -1467,11 +1529,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1502,6 +1566,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       anyField_.WriteTo(ref output, _repeated_anyField_codec);
       apiField_.WriteTo(ref output, _repeated_apiField_codec);
@@ -1528,6 +1593,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += anyField_.CalculateSize(_repeated_anyField_codec);
@@ -1555,6 +1621,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(RepeatedWellKnownTypes other) {
       if (other == null) {
         return;
@@ -1581,6 +1648,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1670,6 +1738,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1764,19 +1833,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<OneofWellKnownTypes> _parser = new pb::MessageParser<OneofWellKnownTypes>(() => new OneofWellKnownTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<OneofWellKnownTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestWellKnownTypesReflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofWellKnownTypes() {
       OnConstruction();
     }
@@ -1784,6 +1857,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofWellKnownTypes(OneofWellKnownTypes other) : this() {
       switch (other.OneofFieldCase) {
         case OneofFieldOneofCase.AnyField:
@@ -1846,6 +1920,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofWellKnownTypes Clone() {
       return new OneofWellKnownTypes(this);
     }
@@ -1853,6 +1928,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "any_field" field.</summary>
     public const int AnyFieldFieldNumber = 1;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Any AnyField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.AnyField ? (global::Google.Protobuf.WellKnownTypes.Any) oneofField_ : null; }
       set {
@@ -1864,6 +1940,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "api_field" field.</summary>
     public const int ApiFieldFieldNumber = 2;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Api ApiField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.ApiField ? (global::Google.Protobuf.WellKnownTypes.Api) oneofField_ : null; }
       set {
@@ -1875,6 +1952,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "duration_field" field.</summary>
     public const int DurationFieldFieldNumber = 3;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Duration DurationField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.DurationField ? (global::Google.Protobuf.WellKnownTypes.Duration) oneofField_ : null; }
       set {
@@ -1886,6 +1964,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "empty_field" field.</summary>
     public const int EmptyFieldFieldNumber = 4;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Empty EmptyField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.EmptyField ? (global::Google.Protobuf.WellKnownTypes.Empty) oneofField_ : null; }
       set {
@@ -1897,6 +1976,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "field_mask_field" field.</summary>
     public const int FieldMaskFieldFieldNumber = 5;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.FieldMask FieldMaskField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.FieldMaskField ? (global::Google.Protobuf.WellKnownTypes.FieldMask) oneofField_ : null; }
       set {
@@ -1908,6 +1988,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "source_context_field" field.</summary>
     public const int SourceContextFieldFieldNumber = 6;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.SourceContext SourceContextField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.SourceContextField ? (global::Google.Protobuf.WellKnownTypes.SourceContext) oneofField_ : null; }
       set {
@@ -1919,6 +2000,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "struct_field" field.</summary>
     public const int StructFieldFieldNumber = 7;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Struct StructField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.StructField ? (global::Google.Protobuf.WellKnownTypes.Struct) oneofField_ : null; }
       set {
@@ -1930,6 +2012,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "timestamp_field" field.</summary>
     public const int TimestampFieldFieldNumber = 8;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Timestamp TimestampField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.TimestampField ? (global::Google.Protobuf.WellKnownTypes.Timestamp) oneofField_ : null; }
       set {
@@ -1941,6 +2024,7 @@ namespace Google.Protobuf.TestProtos {
     /// <summary>Field number for the "type_field" field.</summary>
     public const int TypeFieldFieldNumber = 9;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Type TypeField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.TypeField ? (global::Google.Protobuf.WellKnownTypes.Type) oneofField_ : null; }
       set {
@@ -1953,6 +2037,7 @@ namespace Google.Protobuf.TestProtos {
     public const int DoubleFieldFieldNumber = 10;
     private static readonly pb::FieldCodec<double?> _oneof_doubleField_codec = pb::FieldCodec.ForStructWrapper<double>(82);
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double? DoubleField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.DoubleField ? (double?) oneofField_ : (double?) null; }
       set {
@@ -1965,6 +2050,7 @@ namespace Google.Protobuf.TestProtos {
     public const int FloatFieldFieldNumber = 11;
     private static readonly pb::FieldCodec<float?> _oneof_floatField_codec = pb::FieldCodec.ForStructWrapper<float>(90);
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float? FloatField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.FloatField ? (float?) oneofField_ : (float?) null; }
       set {
@@ -1977,6 +2063,7 @@ namespace Google.Protobuf.TestProtos {
     public const int Int64FieldFieldNumber = 12;
     private static readonly pb::FieldCodec<long?> _oneof_int64Field_codec = pb::FieldCodec.ForStructWrapper<long>(98);
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long? Int64Field {
       get { return oneofFieldCase_ == OneofFieldOneofCase.Int64Field ? (long?) oneofField_ : (long?) null; }
       set {
@@ -1989,6 +2076,7 @@ namespace Google.Protobuf.TestProtos {
     public const int Uint64FieldFieldNumber = 13;
     private static readonly pb::FieldCodec<ulong?> _oneof_uint64Field_codec = pb::FieldCodec.ForStructWrapper<ulong>(106);
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong? Uint64Field {
       get { return oneofFieldCase_ == OneofFieldOneofCase.Uint64Field ? (ulong?) oneofField_ : (ulong?) null; }
       set {
@@ -2001,6 +2089,7 @@ namespace Google.Protobuf.TestProtos {
     public const int Int32FieldFieldNumber = 14;
     private static readonly pb::FieldCodec<int?> _oneof_int32Field_codec = pb::FieldCodec.ForStructWrapper<int>(114);
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int? Int32Field {
       get { return oneofFieldCase_ == OneofFieldOneofCase.Int32Field ? (int?) oneofField_ : (int?) null; }
       set {
@@ -2013,6 +2102,7 @@ namespace Google.Protobuf.TestProtos {
     public const int Uint32FieldFieldNumber = 15;
     private static readonly pb::FieldCodec<uint?> _oneof_uint32Field_codec = pb::FieldCodec.ForStructWrapper<uint>(122);
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint? Uint32Field {
       get { return oneofFieldCase_ == OneofFieldOneofCase.Uint32Field ? (uint?) oneofField_ : (uint?) null; }
       set {
@@ -2025,6 +2115,7 @@ namespace Google.Protobuf.TestProtos {
     public const int BoolFieldFieldNumber = 16;
     private static readonly pb::FieldCodec<bool?> _oneof_boolField_codec = pb::FieldCodec.ForStructWrapper<bool>(130);
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool? BoolField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.BoolField ? (bool?) oneofField_ : (bool?) null; }
       set {
@@ -2037,6 +2128,7 @@ namespace Google.Protobuf.TestProtos {
     public const int StringFieldFieldNumber = 17;
     private static readonly pb::FieldCodec<string> _oneof_stringField_codec = pb::FieldCodec.ForClassWrapper<string>(138);
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.StringField ? (string) oneofField_ : (string) null; }
       set {
@@ -2049,6 +2141,7 @@ namespace Google.Protobuf.TestProtos {
     public const int BytesFieldFieldNumber = 18;
     private static readonly pb::FieldCodec<pb::ByteString> _oneof_bytesField_codec = pb::FieldCodec.ForClassWrapper<pb::ByteString>(146);
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString BytesField {
       get { return oneofFieldCase_ == OneofFieldOneofCase.BytesField ? (pb::ByteString) oneofField_ : (pb::ByteString) null; }
       set {
@@ -2082,22 +2175,26 @@ namespace Google.Protobuf.TestProtos {
     }
     private OneofFieldOneofCase oneofFieldCase_ = OneofFieldOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofFieldOneofCase OneofFieldCase {
       get { return oneofFieldCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofField() {
       oneofFieldCase_ = OneofFieldOneofCase.None;
       oneofField_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as OneofWellKnownTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(OneofWellKnownTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2128,6 +2225,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (oneofFieldCase_ == OneofFieldOneofCase.AnyField) hash ^= AnyField.GetHashCode();
@@ -2156,11 +2254,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2236,6 +2336,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (oneofFieldCase_ == OneofFieldOneofCase.AnyField) {
         output.WriteRawTag(10);
@@ -2307,6 +2408,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (oneofFieldCase_ == OneofFieldOneofCase.AnyField) {
@@ -2370,6 +2472,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(OneofWellKnownTypes other) {
       if (other == null) {
         return;
@@ -2462,6 +2565,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2596,6 +2700,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2740,19 +2845,23 @@ namespace Google.Protobuf.TestProtos {
     private static readonly pb::MessageParser<MapWellKnownTypes> _parser = new pb::MessageParser<MapWellKnownTypes>(() => new MapWellKnownTypes());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MapWellKnownTypes> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.TestProtos.UnittestWellKnownTypesReflection.Descriptor.MessageTypes[3]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MapWellKnownTypes() {
       OnConstruction();
     }
@@ -2760,6 +2869,7 @@ namespace Google.Protobuf.TestProtos {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MapWellKnownTypes(MapWellKnownTypes other) : this() {
       anyField_ = other.anyField_.Clone();
       apiField_ = other.apiField_.Clone();
@@ -2783,6 +2893,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MapWellKnownTypes Clone() {
       return new MapWellKnownTypes(this);
     }
@@ -2793,6 +2904,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Any>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.WellKnownTypes.Any.Parser), 10);
     private readonly pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Any> anyField_ = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Any>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Any> AnyField {
       get { return anyField_; }
     }
@@ -2803,6 +2915,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Api>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.WellKnownTypes.Api.Parser), 18);
     private readonly pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Api> apiField_ = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Api>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Api> ApiField {
       get { return apiField_; }
     }
@@ -2813,6 +2926,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Duration>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.WellKnownTypes.Duration.Parser), 26);
     private readonly pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Duration> durationField_ = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Duration>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Duration> DurationField {
       get { return durationField_; }
     }
@@ -2823,6 +2937,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Empty>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.WellKnownTypes.Empty.Parser), 34);
     private readonly pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Empty> emptyField_ = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Empty>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Empty> EmptyField {
       get { return emptyField_; }
     }
@@ -2833,6 +2948,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.FieldMask>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.WellKnownTypes.FieldMask.Parser), 42);
     private readonly pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.FieldMask> fieldMaskField_ = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.FieldMask>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.FieldMask> FieldMaskField {
       get { return fieldMaskField_; }
     }
@@ -2843,6 +2959,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.SourceContext>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.WellKnownTypes.SourceContext.Parser), 50);
     private readonly pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.SourceContext> sourceContextField_ = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.SourceContext>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.SourceContext> SourceContextField {
       get { return sourceContextField_; }
     }
@@ -2853,6 +2970,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Struct>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.WellKnownTypes.Struct.Parser), 58);
     private readonly pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Struct> structField_ = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Struct>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Struct> StructField {
       get { return structField_; }
     }
@@ -2863,6 +2981,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Timestamp>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.WellKnownTypes.Timestamp.Parser), 66);
     private readonly pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Timestamp> timestampField_ = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Timestamp>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Timestamp> TimestampField {
       get { return timestampField_; }
     }
@@ -2873,6 +2992,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Type>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForMessage(18, global::Google.Protobuf.WellKnownTypes.Type.Parser), 74);
     private readonly pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Type> typeField_ = new pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Type>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, global::Google.Protobuf.WellKnownTypes.Type> TypeField {
       get { return typeField_; }
     }
@@ -2883,6 +3003,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, double?>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForStructWrapper<double>(18), 82);
     private readonly pbc::MapField<int, double?> doubleField_ = new pbc::MapField<int, double?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, double?> DoubleField {
       get { return doubleField_; }
     }
@@ -2893,6 +3014,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, float?>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForStructWrapper<float>(18), 90);
     private readonly pbc::MapField<int, float?> floatField_ = new pbc::MapField<int, float?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, float?> FloatField {
       get { return floatField_; }
     }
@@ -2903,6 +3025,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, long?>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForStructWrapper<long>(18), 98);
     private readonly pbc::MapField<int, long?> int64Field_ = new pbc::MapField<int, long?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, long?> Int64Field {
       get { return int64Field_; }
     }
@@ -2913,6 +3036,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, ulong?>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForStructWrapper<ulong>(18), 106);
     private readonly pbc::MapField<int, ulong?> uint64Field_ = new pbc::MapField<int, ulong?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, ulong?> Uint64Field {
       get { return uint64Field_; }
     }
@@ -2923,6 +3047,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, int?>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForStructWrapper<int>(18), 114);
     private readonly pbc::MapField<int, int?> int32Field_ = new pbc::MapField<int, int?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, int?> Int32Field {
       get { return int32Field_; }
     }
@@ -2933,6 +3058,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, uint?>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForStructWrapper<uint>(18), 122);
     private readonly pbc::MapField<int, uint?> uint32Field_ = new pbc::MapField<int, uint?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, uint?> Uint32Field {
       get { return uint32Field_; }
     }
@@ -2943,6 +3069,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, bool?>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForStructWrapper<bool>(18), 130);
     private readonly pbc::MapField<int, bool?> boolField_ = new pbc::MapField<int, bool?>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, bool?> BoolField {
       get { return boolField_; }
     }
@@ -2953,6 +3080,7 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, string>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForClassWrapper<string>(18), 138);
     private readonly pbc::MapField<int, string> stringField_ = new pbc::MapField<int, string>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, string> StringField {
       get { return stringField_; }
     }
@@ -2963,16 +3091,19 @@ namespace Google.Protobuf.TestProtos {
         = new pbc::MapField<int, pb::ByteString>.Codec(pb::FieldCodec.ForInt32(8, 0), pb::FieldCodec.ForClassWrapper<pb::ByteString>(18), 146);
     private readonly pbc::MapField<int, pb::ByteString> bytesField_ = new pbc::MapField<int, pb::ByteString>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<int, pb::ByteString> BytesField {
       get { return bytesField_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MapWellKnownTypes);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MapWellKnownTypes other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3002,6 +3133,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= AnyField.GetHashCode();
@@ -3029,11 +3161,13 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3064,6 +3198,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       anyField_.WriteTo(ref output, _map_anyField_codec);
       apiField_.WriteTo(ref output, _map_apiField_codec);
@@ -3090,6 +3225,7 @@ namespace Google.Protobuf.TestProtos {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += anyField_.CalculateSize(_map_anyField_codec);
@@ -3117,6 +3253,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MapWellKnownTypes other) {
       if (other == null) {
         return;
@@ -3143,6 +3280,7 @@ namespace Google.Protobuf.TestProtos {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3232,6 +3370,7 @@ namespace Google.Protobuf.TestProtos {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/Reflection/Descriptor.cs b/csharp/src/Google.Protobuf/Reflection/Descriptor.cs
index a1ad559bee..5cae6ac9b2 100644
--- a/csharp/src/Google.Protobuf/Reflection/Descriptor.cs
+++ b/csharp/src/Google.Protobuf/Reflection/Descriptor.cs
@@ -202,19 +202,23 @@ namespace Google.Protobuf.Reflection {
     private static readonly pb::MessageParser<FileDescriptorSet> _parser = new pb::MessageParser<FileDescriptorSet>(() => new FileDescriptorSet());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FileDescriptorSet> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FileDescriptorSet() {
       OnConstruction();
     }
@@ -222,12 +226,14 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FileDescriptorSet(FileDescriptorSet other) : this() {
       file_ = other.file_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FileDescriptorSet Clone() {
       return new FileDescriptorSet(this);
     }
@@ -238,16 +244,19 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(10, global::Google.Protobuf.Reflection.FileDescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.FileDescriptorProto> file_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.FileDescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.FileDescriptorProto> File {
       get { return file_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FileDescriptorSet);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FileDescriptorSet other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -260,6 +269,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= file_.GetHashCode();
@@ -270,11 +280,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -288,6 +300,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       file_.WriteTo(ref output, _repeated_file_codec);
       if (_unknownFields != null) {
@@ -297,6 +310,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += file_.CalculateSize(_repeated_file_codec);
@@ -307,6 +321,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FileDescriptorSet other) {
       if (other == null) {
         return;
@@ -316,6 +331,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -337,6 +353,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -366,19 +383,23 @@ namespace Google.Protobuf.Reflection {
     private static readonly pb::MessageParser<FileDescriptorProto> _parser = new pb::MessageParser<FileDescriptorProto>(() => new FileDescriptorProto());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FileDescriptorProto> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FileDescriptorProto() {
       OnConstruction();
     }
@@ -386,6 +407,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FileDescriptorProto(FileDescriptorProto other) : this() {
       name_ = other.name_;
       package_ = other.package_;
@@ -403,6 +425,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FileDescriptorProto Clone() {
       return new FileDescriptorProto(this);
     }
@@ -416,6 +439,7 @@ namespace Google.Protobuf.Reflection {
     /// file name, relative to root of source tree
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_ ?? NameDefaultValue; }
       set {
@@ -424,11 +448,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "name" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasName {
       get { return name_ != null; }
     }
     /// <summary>Clears the value of the "name" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearName() {
       name_ = null;
     }
@@ -442,6 +468,7 @@ namespace Google.Protobuf.Reflection {
     /// e.g. "foo", "foo.bar", etc.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Package {
       get { return package_ ?? PackageDefaultValue; }
       set {
@@ -450,11 +477,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "package" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasPackage {
       get { return package_ != null; }
     }
     /// <summary>Clears the value of the "package" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearPackage() {
       package_ = null;
     }
@@ -468,6 +497,7 @@ namespace Google.Protobuf.Reflection {
     /// Names of files imported by this file.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> Dependency {
       get { return dependency_; }
     }
@@ -481,6 +511,7 @@ namespace Google.Protobuf.Reflection {
     /// Indexes of the public imported files in the dependency list above.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> PublicDependency {
       get { return publicDependency_; }
     }
@@ -495,6 +526,7 @@ namespace Google.Protobuf.Reflection {
     /// For Google-internal migration only. Do not use.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<int> WeakDependency {
       get { return weakDependency_; }
     }
@@ -508,6 +540,7 @@ namespace Google.Protobuf.Reflection {
     /// All top-level definitions in this file.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.DescriptorProto> MessageType {
       get { return messageType_; }
     }
@@ -518,6 +551,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(42, global::Google.Protobuf.Reflection.EnumDescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.EnumDescriptorProto> enumType_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.EnumDescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.EnumDescriptorProto> EnumType {
       get { return enumType_; }
     }
@@ -528,6 +562,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(50, global::Google.Protobuf.Reflection.ServiceDescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.ServiceDescriptorProto> service_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.ServiceDescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.ServiceDescriptorProto> Service {
       get { return service_; }
     }
@@ -538,6 +573,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(58, global::Google.Protobuf.Reflection.FieldDescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.FieldDescriptorProto> extension_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.FieldDescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.FieldDescriptorProto> Extension {
       get { return extension_; }
     }
@@ -546,6 +582,7 @@ namespace Google.Protobuf.Reflection {
     public const int OptionsFieldNumber = 8;
     private global::Google.Protobuf.Reflection.FileOptions options_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.FileOptions Options {
       get { return options_; }
       set {
@@ -563,6 +600,7 @@ namespace Google.Protobuf.Reflection {
     /// development tools.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.SourceCodeInfo SourceCodeInfo {
       get { return sourceCodeInfo_; }
       set {
@@ -580,6 +618,7 @@ namespace Google.Protobuf.Reflection {
     /// The supported values are "proto2" and "proto3".
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Syntax {
       get { return syntax_ ?? SyntaxDefaultValue; }
       set {
@@ -588,21 +627,25 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "syntax" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasSyntax {
       get { return syntax_ != null; }
     }
     /// <summary>Clears the value of the "syntax" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearSyntax() {
       syntax_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FileDescriptorProto);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FileDescriptorProto other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -626,6 +669,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasName) hash ^= Name.GetHashCode();
@@ -647,11 +691,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -691,6 +737,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasName) {
         output.WriteRawTag(10);
@@ -726,6 +773,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasName) {
@@ -757,6 +805,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FileDescriptorProto other) {
       if (other == null) {
         return;
@@ -793,6 +842,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -866,6 +916,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -947,19 +998,23 @@ namespace Google.Protobuf.Reflection {
     private static readonly pb::MessageParser<DescriptorProto> _parser = new pb::MessageParser<DescriptorProto>(() => new DescriptorProto());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<DescriptorProto> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DescriptorProto() {
       OnConstruction();
     }
@@ -967,6 +1022,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DescriptorProto(DescriptorProto other) : this() {
       name_ = other.name_;
       field_ = other.field_.Clone();
@@ -982,6 +1038,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DescriptorProto Clone() {
       return new DescriptorProto(this);
     }
@@ -992,6 +1049,7 @@ namespace Google.Protobuf.Reflection {
 
     private string name_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_ ?? NameDefaultValue; }
       set {
@@ -1000,11 +1058,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "name" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasName {
       get { return name_ != null; }
     }
     /// <summary>Clears the value of the "name" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearName() {
       name_ = null;
     }
@@ -1015,6 +1075,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(18, global::Google.Protobuf.Reflection.FieldDescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.FieldDescriptorProto> field_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.FieldDescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.FieldDescriptorProto> Field {
       get { return field_; }
     }
@@ -1025,6 +1086,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(50, global::Google.Protobuf.Reflection.FieldDescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.FieldDescriptorProto> extension_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.FieldDescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.FieldDescriptorProto> Extension {
       get { return extension_; }
     }
@@ -1035,6 +1097,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(26, global::Google.Protobuf.Reflection.DescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.DescriptorProto> nestedType_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.DescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.DescriptorProto> NestedType {
       get { return nestedType_; }
     }
@@ -1045,6 +1108,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(34, global::Google.Protobuf.Reflection.EnumDescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.EnumDescriptorProto> enumType_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.EnumDescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.EnumDescriptorProto> EnumType {
       get { return enumType_; }
     }
@@ -1055,6 +1119,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(42, global::Google.Protobuf.Reflection.DescriptorProto.Types.ExtensionRange.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.DescriptorProto.Types.ExtensionRange> extensionRange_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.DescriptorProto.Types.ExtensionRange>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.DescriptorProto.Types.ExtensionRange> ExtensionRange {
       get { return extensionRange_; }
     }
@@ -1065,6 +1130,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(66, global::Google.Protobuf.Reflection.OneofDescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.OneofDescriptorProto> oneofDecl_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.OneofDescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.OneofDescriptorProto> OneofDecl {
       get { return oneofDecl_; }
     }
@@ -1073,6 +1139,7 @@ namespace Google.Protobuf.Reflection {
     public const int OptionsFieldNumber = 7;
     private global::Google.Protobuf.Reflection.MessageOptions options_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.MessageOptions Options {
       get { return options_; }
       set {
@@ -1086,6 +1153,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(74, global::Google.Protobuf.Reflection.DescriptorProto.Types.ReservedRange.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.DescriptorProto.Types.ReservedRange> reservedRange_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.DescriptorProto.Types.ReservedRange>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.DescriptorProto.Types.ReservedRange> ReservedRange {
       get { return reservedRange_; }
     }
@@ -1100,16 +1168,19 @@ namespace Google.Protobuf.Reflection {
     /// A given name may only be reserved once.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> ReservedName {
       get { return reservedName_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as DescriptorProto);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(DescriptorProto other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1131,6 +1202,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasName) hash ^= Name.GetHashCode();
@@ -1150,11 +1222,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1183,6 +1257,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasName) {
         output.WriteRawTag(10);
@@ -1207,6 +1282,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasName) {
@@ -1230,6 +1306,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(DescriptorProto other) {
       if (other == null) {
         return;
@@ -1255,6 +1332,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1315,6 +1393,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1373,6 +1452,7 @@ namespace Google.Protobuf.Reflection {
     #region Nested types
     /// <summary>Container for nested types declared in the DescriptorProto message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class ExtensionRange : pb::IMessage<ExtensionRange>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -1383,19 +1463,23 @@ namespace Google.Protobuf.Reflection {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<ExtensionRange> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.Reflection.DescriptorProto.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public ExtensionRange() {
           OnConstruction();
         }
@@ -1403,6 +1487,7 @@ namespace Google.Protobuf.Reflection {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public ExtensionRange(ExtensionRange other) : this() {
           _hasBits0 = other._hasBits0;
           start_ = other.start_;
@@ -1412,6 +1497,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public ExtensionRange Clone() {
           return new ExtensionRange(this);
         }
@@ -1425,6 +1511,7 @@ namespace Google.Protobuf.Reflection {
         /// Inclusive.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Start {
           get { if ((_hasBits0 & 1) != 0) { return start_; } else { return StartDefaultValue; } }
           set {
@@ -1434,11 +1521,13 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "start" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasStart {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "start" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearStart() {
           _hasBits0 &= ~1;
         }
@@ -1452,6 +1541,7 @@ namespace Google.Protobuf.Reflection {
         /// Exclusive.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int End {
           get { if ((_hasBits0 & 2) != 0) { return end_; } else { return EndDefaultValue; } }
           set {
@@ -1461,11 +1551,13 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "end" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasEnd {
           get { return (_hasBits0 & 2) != 0; }
         }
         /// <summary>Clears the value of the "end" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearEnd() {
           _hasBits0 &= ~2;
         }
@@ -1474,6 +1566,7 @@ namespace Google.Protobuf.Reflection {
         public const int OptionsFieldNumber = 3;
         private global::Google.Protobuf.Reflection.ExtensionRangeOptions options_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public global::Google.Protobuf.Reflection.ExtensionRangeOptions Options {
           get { return options_; }
           set {
@@ -1482,11 +1575,13 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as ExtensionRange);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(ExtensionRange other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -1501,6 +1596,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasStart) hash ^= Start.GetHashCode();
@@ -1513,11 +1609,13 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -1542,6 +1640,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasStart) {
             output.WriteRawTag(8);
@@ -1562,6 +1661,7 @@ namespace Google.Protobuf.Reflection {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasStart) {
@@ -1580,6 +1680,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(ExtensionRange other) {
           if (other == null) {
             return;
@@ -1600,6 +1701,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -1632,6 +1734,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -1675,19 +1778,23 @@ namespace Google.Protobuf.Reflection {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<ReservedRange> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.Reflection.DescriptorProto.Descriptor.NestedTypes[1]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public ReservedRange() {
           OnConstruction();
         }
@@ -1695,6 +1802,7 @@ namespace Google.Protobuf.Reflection {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public ReservedRange(ReservedRange other) : this() {
           _hasBits0 = other._hasBits0;
           start_ = other.start_;
@@ -1703,6 +1811,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public ReservedRange Clone() {
           return new ReservedRange(this);
         }
@@ -1716,6 +1825,7 @@ namespace Google.Protobuf.Reflection {
         /// Inclusive.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Start {
           get { if ((_hasBits0 & 1) != 0) { return start_; } else { return StartDefaultValue; } }
           set {
@@ -1725,11 +1835,13 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "start" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasStart {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "start" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearStart() {
           _hasBits0 &= ~1;
         }
@@ -1743,6 +1855,7 @@ namespace Google.Protobuf.Reflection {
         /// Exclusive.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int End {
           get { if ((_hasBits0 & 2) != 0) { return end_; } else { return EndDefaultValue; } }
           set {
@@ -1752,21 +1865,25 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "end" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasEnd {
           get { return (_hasBits0 & 2) != 0; }
         }
         /// <summary>Clears the value of the "end" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearEnd() {
           _hasBits0 &= ~2;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as ReservedRange);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(ReservedRange other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -1780,6 +1897,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasStart) hash ^= Start.GetHashCode();
@@ -1791,11 +1909,13 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -1816,6 +1936,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasStart) {
             output.WriteRawTag(8);
@@ -1832,6 +1953,7 @@ namespace Google.Protobuf.Reflection {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasStart) {
@@ -1847,6 +1969,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(ReservedRange other) {
           if (other == null) {
             return;
@@ -1861,6 +1984,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -1886,6 +2010,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -1923,19 +2048,23 @@ namespace Google.Protobuf.Reflection {
     internal pb::ExtensionSet<ExtensionRangeOptions> _extensions;
     private pb::ExtensionSet<ExtensionRangeOptions> _Extensions { get { return _extensions; } }
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ExtensionRangeOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[3]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ExtensionRangeOptions() {
       OnConstruction();
     }
@@ -1943,6 +2072,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ExtensionRangeOptions(ExtensionRangeOptions other) : this() {
       uninterpretedOption_ = other.uninterpretedOption_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
@@ -1950,6 +2080,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ExtensionRangeOptions Clone() {
       return new ExtensionRangeOptions(this);
     }
@@ -1963,16 +2094,19 @@ namespace Google.Protobuf.Reflection {
     /// The parser stores options it doesn't recognize here. See above.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption> UninterpretedOption {
       get { return uninterpretedOption_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ExtensionRangeOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ExtensionRangeOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1988,6 +2122,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= uninterpretedOption_.GetHashCode();
@@ -2001,11 +2136,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2022,6 +2159,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       uninterpretedOption_.WriteTo(ref output, _repeated_uninterpretedOption_codec);
       if (_extensions != null) {
@@ -2034,6 +2172,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += uninterpretedOption_.CalculateSize(_repeated_uninterpretedOption_codec);
@@ -2047,6 +2186,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ExtensionRangeOptions other) {
       if (other == null) {
         return;
@@ -2057,6 +2197,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2080,6 +2221,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2134,19 +2276,23 @@ namespace Google.Protobuf.Reflection {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FieldDescriptorProto> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[4]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FieldDescriptorProto() {
       OnConstruction();
     }
@@ -2154,6 +2300,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FieldDescriptorProto(FieldDescriptorProto other) : this() {
       _hasBits0 = other._hasBits0;
       name_ = other.name_;
@@ -2171,6 +2318,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FieldDescriptorProto Clone() {
       return new FieldDescriptorProto(this);
     }
@@ -2181,6 +2329,7 @@ namespace Google.Protobuf.Reflection {
 
     private string name_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_ ?? NameDefaultValue; }
       set {
@@ -2189,11 +2338,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "name" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasName {
       get { return name_ != null; }
     }
     /// <summary>Clears the value of the "name" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearName() {
       name_ = null;
     }
@@ -2204,6 +2355,7 @@ namespace Google.Protobuf.Reflection {
 
     private int number_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Number {
       get { if ((_hasBits0 & 1) != 0) { return number_; } else { return NumberDefaultValue; } }
       set {
@@ -2213,11 +2365,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "number" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasNumber {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "number" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearNumber() {
       _hasBits0 &= ~1;
     }
@@ -2228,6 +2382,7 @@ namespace Google.Protobuf.Reflection {
 
     private global::Google.Protobuf.Reflection.FieldDescriptorProto.Types.Label label_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.FieldDescriptorProto.Types.Label Label {
       get { if ((_hasBits0 & 2) != 0) { return label_; } else { return LabelDefaultValue; } }
       set {
@@ -2237,11 +2392,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "label" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasLabel {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "label" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearLabel() {
       _hasBits0 &= ~2;
     }
@@ -2256,6 +2413,7 @@ namespace Google.Protobuf.Reflection {
     /// are set, this must be one of TYPE_ENUM, TYPE_MESSAGE or TYPE_GROUP.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.FieldDescriptorProto.Types.Type Type {
       get { if ((_hasBits0 & 4) != 0) { return type_; } else { return TypeDefaultValue; } }
       set {
@@ -2265,11 +2423,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "type" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasType {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "type" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearType() {
       _hasBits0 &= ~4;
     }
@@ -2287,6 +2447,7 @@ namespace Google.Protobuf.Reflection {
     /// namespace).
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string TypeName {
       get { return typeName_ ?? TypeNameDefaultValue; }
       set {
@@ -2295,11 +2456,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "type_name" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasTypeName {
       get { return typeName_ != null; }
     }
     /// <summary>Clears the value of the "type_name" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearTypeName() {
       typeName_ = null;
     }
@@ -2314,6 +2477,7 @@ namespace Google.Protobuf.Reflection {
     /// resolved in the same manner as type_name.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Extendee {
       get { return extendee_ ?? ExtendeeDefaultValue; }
       set {
@@ -2322,11 +2486,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "extendee" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasExtendee {
       get { return extendee_ != null; }
     }
     /// <summary>Clears the value of the "extendee" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearExtendee() {
       extendee_ = null;
     }
@@ -2344,6 +2510,7 @@ namespace Google.Protobuf.Reflection {
     /// TODO(kenton):  Base-64 encode?
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string DefaultValue {
       get { return defaultValue_ ?? DefaultValueDefaultValue; }
       set {
@@ -2352,11 +2519,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "default_value" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDefaultValue {
       get { return defaultValue_ != null; }
     }
     /// <summary>Clears the value of the "default_value" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDefaultValue() {
       defaultValue_ = null;
     }
@@ -2371,6 +2540,7 @@ namespace Google.Protobuf.Reflection {
     /// list.  This field is a member of that oneof.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OneofIndex {
       get { if ((_hasBits0 & 8) != 0) { return oneofIndex_; } else { return OneofIndexDefaultValue; } }
       set {
@@ -2380,11 +2550,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "oneof_index" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOneofIndex {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "oneof_index" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOneofIndex() {
       _hasBits0 &= ~8;
     }
@@ -2401,6 +2573,7 @@ namespace Google.Protobuf.Reflection {
     /// it to camelCase.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string JsonName {
       get { return jsonName_ ?? JsonNameDefaultValue; }
       set {
@@ -2409,11 +2582,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "json_name" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasJsonName {
       get { return jsonName_ != null; }
     }
     /// <summary>Clears the value of the "json_name" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearJsonName() {
       jsonName_ = null;
     }
@@ -2422,6 +2597,7 @@ namespace Google.Protobuf.Reflection {
     public const int OptionsFieldNumber = 8;
     private global::Google.Protobuf.Reflection.FieldOptions options_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.FieldOptions Options {
       get { return options_; }
       set {
@@ -2458,6 +2634,7 @@ namespace Google.Protobuf.Reflection {
     /// optional with `LABEL_OPTIONAL`.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Proto3Optional {
       get { if ((_hasBits0 & 16) != 0) { return proto3Optional_; } else { return Proto3OptionalDefaultValue; } }
       set {
@@ -2467,21 +2644,25 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "proto3_optional" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasProto3Optional {
       get { return (_hasBits0 & 16) != 0; }
     }
     /// <summary>Clears the value of the "proto3_optional" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearProto3Optional() {
       _hasBits0 &= ~16;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FieldDescriptorProto);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FieldDescriptorProto other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -2504,6 +2685,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasName) hash ^= Name.GetHashCode();
@@ -2524,11 +2706,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -2585,6 +2769,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasName) {
         output.WriteRawTag(10);
@@ -2637,6 +2822,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasName) {
@@ -2679,6 +2865,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FieldDescriptorProto other) {
       if (other == null) {
         return;
@@ -2723,6 +2910,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -2787,6 +2975,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -2849,6 +3038,7 @@ namespace Google.Protobuf.Reflection {
     #region Nested types
     /// <summary>Container for nested types declared in the FieldDescriptorProto message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum Type {
         /// <summary>
@@ -2926,19 +3116,23 @@ namespace Google.Protobuf.Reflection {
     private static readonly pb::MessageParser<OneofDescriptorProto> _parser = new pb::MessageParser<OneofDescriptorProto>(() => new OneofDescriptorProto());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<OneofDescriptorProto> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[5]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofDescriptorProto() {
       OnConstruction();
     }
@@ -2946,6 +3140,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofDescriptorProto(OneofDescriptorProto other) : this() {
       name_ = other.name_;
       options_ = other.options_ != null ? other.options_.Clone() : null;
@@ -2953,6 +3148,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofDescriptorProto Clone() {
       return new OneofDescriptorProto(this);
     }
@@ -2963,6 +3159,7 @@ namespace Google.Protobuf.Reflection {
 
     private string name_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_ ?? NameDefaultValue; }
       set {
@@ -2971,11 +3168,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "name" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasName {
       get { return name_ != null; }
     }
     /// <summary>Clears the value of the "name" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearName() {
       name_ = null;
     }
@@ -2984,6 +3183,7 @@ namespace Google.Protobuf.Reflection {
     public const int OptionsFieldNumber = 2;
     private global::Google.Protobuf.Reflection.OneofOptions options_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.OneofOptions Options {
       get { return options_; }
       set {
@@ -2992,11 +3192,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as OneofDescriptorProto);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(OneofDescriptorProto other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3010,6 +3212,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasName) hash ^= Name.GetHashCode();
@@ -3021,11 +3224,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3046,6 +3251,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasName) {
         output.WriteRawTag(10);
@@ -3062,6 +3268,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasName) {
@@ -3077,6 +3284,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(OneofDescriptorProto other) {
       if (other == null) {
         return;
@@ -3094,6 +3302,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3122,6 +3331,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3158,19 +3368,23 @@ namespace Google.Protobuf.Reflection {
     private static readonly pb::MessageParser<EnumDescriptorProto> _parser = new pb::MessageParser<EnumDescriptorProto>(() => new EnumDescriptorProto());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<EnumDescriptorProto> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[6]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumDescriptorProto() {
       OnConstruction();
     }
@@ -3178,6 +3392,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumDescriptorProto(EnumDescriptorProto other) : this() {
       name_ = other.name_;
       value_ = other.value_.Clone();
@@ -3188,6 +3403,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumDescriptorProto Clone() {
       return new EnumDescriptorProto(this);
     }
@@ -3198,6 +3414,7 @@ namespace Google.Protobuf.Reflection {
 
     private string name_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_ ?? NameDefaultValue; }
       set {
@@ -3206,11 +3423,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "name" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasName {
       get { return name_ != null; }
     }
     /// <summary>Clears the value of the "name" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearName() {
       name_ = null;
     }
@@ -3221,6 +3440,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(18, global::Google.Protobuf.Reflection.EnumValueDescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.EnumValueDescriptorProto> value_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.EnumValueDescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.EnumValueDescriptorProto> Value {
       get { return value_; }
     }
@@ -3229,6 +3449,7 @@ namespace Google.Protobuf.Reflection {
     public const int OptionsFieldNumber = 3;
     private global::Google.Protobuf.Reflection.EnumOptions options_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.EnumOptions Options {
       get { return options_; }
       set {
@@ -3247,6 +3468,7 @@ namespace Google.Protobuf.Reflection {
     /// overlap.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.EnumDescriptorProto.Types.EnumReservedRange> ReservedRange {
       get { return reservedRange_; }
     }
@@ -3261,16 +3483,19 @@ namespace Google.Protobuf.Reflection {
     /// be reserved once.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> ReservedName {
       get { return reservedName_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as EnumDescriptorProto);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(EnumDescriptorProto other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3287,6 +3512,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasName) hash ^= Name.GetHashCode();
@@ -3301,11 +3527,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3329,6 +3557,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasName) {
         output.WriteRawTag(10);
@@ -3348,6 +3577,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasName) {
@@ -3366,6 +3596,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(EnumDescriptorProto other) {
       if (other == null) {
         return;
@@ -3386,6 +3617,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3426,6 +3658,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -3464,6 +3697,7 @@ namespace Google.Protobuf.Reflection {
     #region Nested types
     /// <summary>Container for nested types declared in the EnumDescriptorProto message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       /// <summary>
       /// Range of reserved numeric values. Reserved values may not be used by
@@ -3482,19 +3716,23 @@ namespace Google.Protobuf.Reflection {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<EnumReservedRange> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.Reflection.EnumDescriptorProto.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public EnumReservedRange() {
           OnConstruction();
         }
@@ -3502,6 +3740,7 @@ namespace Google.Protobuf.Reflection {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public EnumReservedRange(EnumReservedRange other) : this() {
           _hasBits0 = other._hasBits0;
           start_ = other.start_;
@@ -3510,6 +3749,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public EnumReservedRange Clone() {
           return new EnumReservedRange(this);
         }
@@ -3523,6 +3763,7 @@ namespace Google.Protobuf.Reflection {
         /// Inclusive.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Start {
           get { if ((_hasBits0 & 1) != 0) { return start_; } else { return StartDefaultValue; } }
           set {
@@ -3532,11 +3773,13 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "start" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasStart {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "start" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearStart() {
           _hasBits0 &= ~1;
         }
@@ -3550,6 +3793,7 @@ namespace Google.Protobuf.Reflection {
         /// Inclusive.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int End {
           get { if ((_hasBits0 & 2) != 0) { return end_; } else { return EndDefaultValue; } }
           set {
@@ -3559,21 +3803,25 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "end" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasEnd {
           get { return (_hasBits0 & 2) != 0; }
         }
         /// <summary>Clears the value of the "end" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearEnd() {
           _hasBits0 &= ~2;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as EnumReservedRange);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(EnumReservedRange other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -3587,6 +3835,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasStart) hash ^= Start.GetHashCode();
@@ -3598,11 +3847,13 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -3623,6 +3874,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasStart) {
             output.WriteRawTag(8);
@@ -3639,6 +3891,7 @@ namespace Google.Protobuf.Reflection {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasStart) {
@@ -3654,6 +3907,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(EnumReservedRange other) {
           if (other == null) {
             return;
@@ -3668,6 +3922,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -3693,6 +3948,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -3732,19 +3988,23 @@ namespace Google.Protobuf.Reflection {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<EnumValueDescriptorProto> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[7]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumValueDescriptorProto() {
       OnConstruction();
     }
@@ -3752,6 +4012,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumValueDescriptorProto(EnumValueDescriptorProto other) : this() {
       _hasBits0 = other._hasBits0;
       name_ = other.name_;
@@ -3761,6 +4022,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumValueDescriptorProto Clone() {
       return new EnumValueDescriptorProto(this);
     }
@@ -3771,6 +4033,7 @@ namespace Google.Protobuf.Reflection {
 
     private string name_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_ ?? NameDefaultValue; }
       set {
@@ -3779,11 +4042,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "name" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasName {
       get { return name_ != null; }
     }
     /// <summary>Clears the value of the "name" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearName() {
       name_ = null;
     }
@@ -3794,6 +4059,7 @@ namespace Google.Protobuf.Reflection {
 
     private int number_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Number {
       get { if ((_hasBits0 & 1) != 0) { return number_; } else { return NumberDefaultValue; } }
       set {
@@ -3803,11 +4069,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "number" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasNumber {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "number" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearNumber() {
       _hasBits0 &= ~1;
     }
@@ -3816,6 +4084,7 @@ namespace Google.Protobuf.Reflection {
     public const int OptionsFieldNumber = 3;
     private global::Google.Protobuf.Reflection.EnumValueOptions options_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.EnumValueOptions Options {
       get { return options_; }
       set {
@@ -3824,11 +4093,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as EnumValueDescriptorProto);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(EnumValueDescriptorProto other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -3843,6 +4114,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasName) hash ^= Name.GetHashCode();
@@ -3855,11 +4127,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -3884,6 +4158,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasName) {
         output.WriteRawTag(10);
@@ -3904,6 +4179,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasName) {
@@ -3922,6 +4198,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(EnumValueDescriptorProto other) {
       if (other == null) {
         return;
@@ -3942,6 +4219,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -3974,6 +4252,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -4014,19 +4293,23 @@ namespace Google.Protobuf.Reflection {
     private static readonly pb::MessageParser<ServiceDescriptorProto> _parser = new pb::MessageParser<ServiceDescriptorProto>(() => new ServiceDescriptorProto());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ServiceDescriptorProto> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[8]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ServiceDescriptorProto() {
       OnConstruction();
     }
@@ -4034,6 +4317,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ServiceDescriptorProto(ServiceDescriptorProto other) : this() {
       name_ = other.name_;
       method_ = other.method_.Clone();
@@ -4042,6 +4326,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ServiceDescriptorProto Clone() {
       return new ServiceDescriptorProto(this);
     }
@@ -4052,6 +4337,7 @@ namespace Google.Protobuf.Reflection {
 
     private string name_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_ ?? NameDefaultValue; }
       set {
@@ -4060,11 +4346,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "name" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasName {
       get { return name_ != null; }
     }
     /// <summary>Clears the value of the "name" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearName() {
       name_ = null;
     }
@@ -4075,6 +4363,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(18, global::Google.Protobuf.Reflection.MethodDescriptorProto.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.MethodDescriptorProto> method_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.MethodDescriptorProto>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.MethodDescriptorProto> Method {
       get { return method_; }
     }
@@ -4083,6 +4372,7 @@ namespace Google.Protobuf.Reflection {
     public const int OptionsFieldNumber = 3;
     private global::Google.Protobuf.Reflection.ServiceOptions options_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.ServiceOptions Options {
       get { return options_; }
       set {
@@ -4091,11 +4381,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ServiceDescriptorProto);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ServiceDescriptorProto other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -4110,6 +4402,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasName) hash ^= Name.GetHashCode();
@@ -4122,11 +4415,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -4148,6 +4443,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasName) {
         output.WriteRawTag(10);
@@ -4165,6 +4461,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasName) {
@@ -4181,6 +4478,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ServiceDescriptorProto other) {
       if (other == null) {
         return;
@@ -4199,6 +4497,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -4231,6 +4530,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -4272,19 +4572,23 @@ namespace Google.Protobuf.Reflection {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MethodDescriptorProto> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[9]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MethodDescriptorProto() {
       OnConstruction();
     }
@@ -4292,6 +4596,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MethodDescriptorProto(MethodDescriptorProto other) : this() {
       _hasBits0 = other._hasBits0;
       name_ = other.name_;
@@ -4304,6 +4609,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MethodDescriptorProto Clone() {
       return new MethodDescriptorProto(this);
     }
@@ -4314,6 +4620,7 @@ namespace Google.Protobuf.Reflection {
 
     private string name_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_ ?? NameDefaultValue; }
       set {
@@ -4322,11 +4629,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "name" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasName {
       get { return name_ != null; }
     }
     /// <summary>Clears the value of the "name" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearName() {
       name_ = null;
     }
@@ -4341,6 +4650,7 @@ namespace Google.Protobuf.Reflection {
     /// FieldDescriptorProto.type_name, but must refer to a message type.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string InputType {
       get { return inputType_ ?? InputTypeDefaultValue; }
       set {
@@ -4349,11 +4659,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "input_type" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasInputType {
       get { return inputType_ != null; }
     }
     /// <summary>Clears the value of the "input_type" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearInputType() {
       inputType_ = null;
     }
@@ -4364,6 +4676,7 @@ namespace Google.Protobuf.Reflection {
 
     private string outputType_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string OutputType {
       get { return outputType_ ?? OutputTypeDefaultValue; }
       set {
@@ -4372,11 +4685,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "output_type" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOutputType {
       get { return outputType_ != null; }
     }
     /// <summary>Clears the value of the "output_type" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOutputType() {
       outputType_ = null;
     }
@@ -4385,6 +4700,7 @@ namespace Google.Protobuf.Reflection {
     public const int OptionsFieldNumber = 4;
     private global::Google.Protobuf.Reflection.MethodOptions options_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.MethodOptions Options {
       get { return options_; }
       set {
@@ -4401,6 +4717,7 @@ namespace Google.Protobuf.Reflection {
     /// Identifies if client streams multiple client messages
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool ClientStreaming {
       get { if ((_hasBits0 & 1) != 0) { return clientStreaming_; } else { return ClientStreamingDefaultValue; } }
       set {
@@ -4410,11 +4727,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "client_streaming" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasClientStreaming {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "client_streaming" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearClientStreaming() {
       _hasBits0 &= ~1;
     }
@@ -4428,6 +4747,7 @@ namespace Google.Protobuf.Reflection {
     /// Identifies if server streams multiple server messages
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool ServerStreaming {
       get { if ((_hasBits0 & 2) != 0) { return serverStreaming_; } else { return ServerStreamingDefaultValue; } }
       set {
@@ -4437,21 +4757,25 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "server_streaming" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasServerStreaming {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "server_streaming" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearServerStreaming() {
       _hasBits0 &= ~2;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MethodDescriptorProto);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MethodDescriptorProto other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -4469,6 +4793,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasName) hash ^= Name.GetHashCode();
@@ -4484,11 +4809,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -4525,6 +4852,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasName) {
         output.WriteRawTag(10);
@@ -4557,6 +4885,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasName) {
@@ -4584,6 +4913,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MethodDescriptorProto other) {
       if (other == null) {
         return;
@@ -4613,6 +4943,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -4657,6 +4988,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -4709,19 +5041,23 @@ namespace Google.Protobuf.Reflection {
     private pb::ExtensionSet<FileOptions> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FileOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[10]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FileOptions() {
       OnConstruction();
     }
@@ -4729,6 +5065,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FileOptions(FileOptions other) : this() {
       _hasBits0 = other._hasBits0;
       javaPackage_ = other.javaPackage_;
@@ -4757,6 +5094,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FileOptions Clone() {
       return new FileOptions(this);
     }
@@ -4773,6 +5111,7 @@ namespace Google.Protobuf.Reflection {
     /// domain names.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string JavaPackage {
       get { return javaPackage_ ?? JavaPackageDefaultValue; }
       set {
@@ -4781,11 +5120,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "java_package" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasJavaPackage {
       get { return javaPackage_ != null; }
     }
     /// <summary>Clears the value of the "java_package" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearJavaPackage() {
       javaPackage_ = null;
     }
@@ -4803,6 +5144,7 @@ namespace Google.Protobuf.Reflection {
     /// .proto file will be nested inside the single wrapper outer class.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string JavaOuterClassname {
       get { return javaOuterClassname_ ?? JavaOuterClassnameDefaultValue; }
       set {
@@ -4811,11 +5153,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "java_outer_classname" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasJavaOuterClassname {
       get { return javaOuterClassname_ != null; }
     }
     /// <summary>Clears the value of the "java_outer_classname" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearJavaOuterClassname() {
       javaOuterClassname_ = null;
     }
@@ -4834,6 +5178,7 @@ namespace Google.Protobuf.Reflection {
     /// top-level extensions defined in the file.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool JavaMultipleFiles {
       get { if ((_hasBits0 & 2) != 0) { return javaMultipleFiles_; } else { return JavaMultipleFilesDefaultValue; } }
       set {
@@ -4843,11 +5188,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "java_multiple_files" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasJavaMultipleFiles {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "java_multiple_files" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearJavaMultipleFiles() {
       _hasBits0 &= ~2;
     }
@@ -4862,6 +5209,7 @@ namespace Google.Protobuf.Reflection {
     /// </summary>
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool JavaGenerateEqualsAndHash {
       get { if ((_hasBits0 & 32) != 0) { return javaGenerateEqualsAndHash_; } else { return JavaGenerateEqualsAndHashDefaultValue; } }
       set {
@@ -4872,12 +5220,14 @@ namespace Google.Protobuf.Reflection {
     /// <summary>Gets whether the "java_generate_equals_and_hash" field is set</summary>
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasJavaGenerateEqualsAndHash {
       get { return (_hasBits0 & 32) != 0; }
     }
     /// <summary>Clears the value of the "java_generate_equals_and_hash" field</summary>
     [global::System.ObsoleteAttribute]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearJavaGenerateEqualsAndHash() {
       _hasBits0 &= ~32;
     }
@@ -4896,6 +5246,7 @@ namespace Google.Protobuf.Reflection {
     /// This option has no effect on when used with the lite runtime.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool JavaStringCheckUtf8 {
       get { if ((_hasBits0 & 128) != 0) { return javaStringCheckUtf8_; } else { return JavaStringCheckUtf8DefaultValue; } }
       set {
@@ -4905,11 +5256,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "java_string_check_utf8" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasJavaStringCheckUtf8 {
       get { return (_hasBits0 & 128) != 0; }
     }
     /// <summary>Clears the value of the "java_string_check_utf8" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearJavaStringCheckUtf8() {
       _hasBits0 &= ~128;
     }
@@ -4920,6 +5273,7 @@ namespace Google.Protobuf.Reflection {
 
     private global::Google.Protobuf.Reflection.FileOptions.Types.OptimizeMode optimizeFor_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.FileOptions.Types.OptimizeMode OptimizeFor {
       get { if ((_hasBits0 & 1) != 0) { return optimizeFor_; } else { return OptimizeForDefaultValue; } }
       set {
@@ -4929,11 +5283,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "optimize_for" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasOptimizeFor {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "optimize_for" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearOptimizeFor() {
       _hasBits0 &= ~1;
     }
@@ -4951,6 +5307,7 @@ namespace Google.Protobuf.Reflection {
     ///   - Otherwise, the basename of the .proto file, without extension.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string GoPackage {
       get { return goPackage_ ?? GoPackageDefaultValue; }
       set {
@@ -4959,11 +5316,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "go_package" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasGoPackage {
       get { return goPackage_ != null; }
     }
     /// <summary>Clears the value of the "go_package" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearGoPackage() {
       goPackage_ = null;
     }
@@ -4986,6 +5345,7 @@ namespace Google.Protobuf.Reflection {
     /// explicitly set them to true.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool CcGenericServices {
       get { if ((_hasBits0 & 4) != 0) { return ccGenericServices_; } else { return CcGenericServicesDefaultValue; } }
       set {
@@ -4995,11 +5355,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "cc_generic_services" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasCcGenericServices {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "cc_generic_services" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearCcGenericServices() {
       _hasBits0 &= ~4;
     }
@@ -5010,6 +5372,7 @@ namespace Google.Protobuf.Reflection {
 
     private bool javaGenericServices_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool JavaGenericServices {
       get { if ((_hasBits0 & 8) != 0) { return javaGenericServices_; } else { return JavaGenericServicesDefaultValue; } }
       set {
@@ -5019,11 +5382,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "java_generic_services" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasJavaGenericServices {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "java_generic_services" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearJavaGenericServices() {
       _hasBits0 &= ~8;
     }
@@ -5034,6 +5399,7 @@ namespace Google.Protobuf.Reflection {
 
     private bool pyGenericServices_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool PyGenericServices {
       get { if ((_hasBits0 & 16) != 0) { return pyGenericServices_; } else { return PyGenericServicesDefaultValue; } }
       set {
@@ -5043,11 +5409,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "py_generic_services" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasPyGenericServices {
       get { return (_hasBits0 & 16) != 0; }
     }
     /// <summary>Clears the value of the "py_generic_services" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearPyGenericServices() {
       _hasBits0 &= ~16;
     }
@@ -5058,6 +5426,7 @@ namespace Google.Protobuf.Reflection {
 
     private bool phpGenericServices_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool PhpGenericServices {
       get { if ((_hasBits0 & 512) != 0) { return phpGenericServices_; } else { return PhpGenericServicesDefaultValue; } }
       set {
@@ -5067,11 +5436,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "php_generic_services" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasPhpGenericServices {
       get { return (_hasBits0 & 512) != 0; }
     }
     /// <summary>Clears the value of the "php_generic_services" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearPhpGenericServices() {
       _hasBits0 &= ~512;
     }
@@ -5088,6 +5459,7 @@ namespace Google.Protobuf.Reflection {
     /// least, this is a formalization for deprecating files.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Deprecated {
       get { if ((_hasBits0 & 64) != 0) { return deprecated_; } else { return DeprecatedDefaultValue; } }
       set {
@@ -5097,11 +5469,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "deprecated" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDeprecated {
       get { return (_hasBits0 & 64) != 0; }
     }
     /// <summary>Clears the value of the "deprecated" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDeprecated() {
       _hasBits0 &= ~64;
     }
@@ -5116,6 +5490,7 @@ namespace Google.Protobuf.Reflection {
     /// only to generated classes for C++.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool CcEnableArenas {
       get { if ((_hasBits0 & 256) != 0) { return ccEnableArenas_; } else { return CcEnableArenasDefaultValue; } }
       set {
@@ -5125,11 +5500,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "cc_enable_arenas" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasCcEnableArenas {
       get { return (_hasBits0 & 256) != 0; }
     }
     /// <summary>Clears the value of the "cc_enable_arenas" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearCcEnableArenas() {
       _hasBits0 &= ~256;
     }
@@ -5144,6 +5521,7 @@ namespace Google.Protobuf.Reflection {
     /// generated classes from this .proto. There is no default.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string ObjcClassPrefix {
       get { return objcClassPrefix_ ?? ObjcClassPrefixDefaultValue; }
       set {
@@ -5152,11 +5530,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "objc_class_prefix" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasObjcClassPrefix {
       get { return objcClassPrefix_ != null; }
     }
     /// <summary>Clears the value of the "objc_class_prefix" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearObjcClassPrefix() {
       objcClassPrefix_ = null;
     }
@@ -5170,6 +5550,7 @@ namespace Google.Protobuf.Reflection {
     /// Namespace for generated classes; defaults to the package.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string CsharpNamespace {
       get { return csharpNamespace_ ?? CsharpNamespaceDefaultValue; }
       set {
@@ -5178,11 +5559,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "csharp_namespace" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasCsharpNamespace {
       get { return csharpNamespace_ != null; }
     }
     /// <summary>Clears the value of the "csharp_namespace" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearCsharpNamespace() {
       csharpNamespace_ = null;
     }
@@ -5199,6 +5582,7 @@ namespace Google.Protobuf.Reflection {
     /// to prefix the types/symbols defined.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string SwiftPrefix {
       get { return swiftPrefix_ ?? SwiftPrefixDefaultValue; }
       set {
@@ -5207,11 +5591,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "swift_prefix" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasSwiftPrefix {
       get { return swiftPrefix_ != null; }
     }
     /// <summary>Clears the value of the "swift_prefix" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearSwiftPrefix() {
       swiftPrefix_ = null;
     }
@@ -5226,6 +5612,7 @@ namespace Google.Protobuf.Reflection {
     /// from this .proto. Default is empty.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string PhpClassPrefix {
       get { return phpClassPrefix_ ?? PhpClassPrefixDefaultValue; }
       set {
@@ -5234,11 +5621,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "php_class_prefix" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasPhpClassPrefix {
       get { return phpClassPrefix_ != null; }
     }
     /// <summary>Clears the value of the "php_class_prefix" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearPhpClassPrefix() {
       phpClassPrefix_ = null;
     }
@@ -5254,6 +5643,7 @@ namespace Google.Protobuf.Reflection {
     /// determining the namespace.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string PhpNamespace {
       get { return phpNamespace_ ?? PhpNamespaceDefaultValue; }
       set {
@@ -5262,11 +5652,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "php_namespace" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasPhpNamespace {
       get { return phpNamespace_ != null; }
     }
     /// <summary>Clears the value of the "php_namespace" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearPhpNamespace() {
       phpNamespace_ = null;
     }
@@ -5282,6 +5674,7 @@ namespace Google.Protobuf.Reflection {
     /// used for determining the namespace.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string PhpMetadataNamespace {
       get { return phpMetadataNamespace_ ?? PhpMetadataNamespaceDefaultValue; }
       set {
@@ -5290,11 +5683,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "php_metadata_namespace" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasPhpMetadataNamespace {
       get { return phpMetadataNamespace_ != null; }
     }
     /// <summary>Clears the value of the "php_metadata_namespace" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearPhpMetadataNamespace() {
       phpMetadataNamespace_ = null;
     }
@@ -5310,6 +5705,7 @@ namespace Google.Protobuf.Reflection {
     /// determining the ruby package.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string RubyPackage {
       get { return rubyPackage_ ?? RubyPackageDefaultValue; }
       set {
@@ -5318,11 +5714,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "ruby_package" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasRubyPackage {
       get { return rubyPackage_ != null; }
     }
     /// <summary>Clears the value of the "ruby_package" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearRubyPackage() {
       rubyPackage_ = null;
     }
@@ -5337,16 +5735,19 @@ namespace Google.Protobuf.Reflection {
     /// See the documentation for the "Options" section above.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption> UninterpretedOption {
       get { return uninterpretedOption_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FileOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FileOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -5382,6 +5783,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasJavaPackage) hash ^= JavaPackage.GetHashCode();
@@ -5415,11 +5817,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -5516,6 +5920,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasJavaPackage) {
         output.WriteRawTag(10);
@@ -5608,6 +6013,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasJavaPackage) {
@@ -5681,6 +6087,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FileOptions other) {
       if (other == null) {
         return;
@@ -5751,6 +6158,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -5854,6 +6262,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -5977,6 +6386,7 @@ namespace Google.Protobuf.Reflection {
     #region Nested types
     /// <summary>Container for nested types declared in the FileOptions message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       /// <summary>
       /// Generated classes can be optimized for speed or code size.
@@ -6012,19 +6422,23 @@ namespace Google.Protobuf.Reflection {
     private pb::ExtensionSet<MessageOptions> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MessageOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[11]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MessageOptions() {
       OnConstruction();
     }
@@ -6032,6 +6446,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MessageOptions(MessageOptions other) : this() {
       _hasBits0 = other._hasBits0;
       messageSetWireFormat_ = other.messageSetWireFormat_;
@@ -6044,6 +6459,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MessageOptions Clone() {
       return new MessageOptions(this);
     }
@@ -6074,6 +6490,7 @@ namespace Google.Protobuf.Reflection {
     /// the protocol compiler.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool MessageSetWireFormat {
       get { if ((_hasBits0 & 1) != 0) { return messageSetWireFormat_; } else { return MessageSetWireFormatDefaultValue; } }
       set {
@@ -6083,11 +6500,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "message_set_wire_format" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasMessageSetWireFormat {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "message_set_wire_format" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearMessageSetWireFormat() {
       _hasBits0 &= ~1;
     }
@@ -6103,6 +6522,7 @@ namespace Google.Protobuf.Reflection {
     /// from proto1 easier; new code should avoid fields named "descriptor".
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool NoStandardDescriptorAccessor {
       get { if ((_hasBits0 & 2) != 0) { return noStandardDescriptorAccessor_; } else { return NoStandardDescriptorAccessorDefaultValue; } }
       set {
@@ -6112,11 +6532,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "no_standard_descriptor_accessor" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasNoStandardDescriptorAccessor {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "no_standard_descriptor_accessor" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearNoStandardDescriptorAccessor() {
       _hasBits0 &= ~2;
     }
@@ -6133,6 +6555,7 @@ namespace Google.Protobuf.Reflection {
     /// this is a formalization for deprecating messages.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Deprecated {
       get { if ((_hasBits0 & 4) != 0) { return deprecated_; } else { return DeprecatedDefaultValue; } }
       set {
@@ -6142,11 +6565,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "deprecated" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDeprecated {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "deprecated" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDeprecated() {
       _hasBits0 &= ~4;
     }
@@ -6180,6 +6605,7 @@ namespace Google.Protobuf.Reflection {
     /// parser.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool MapEntry {
       get { if ((_hasBits0 & 8) != 0) { return mapEntry_; } else { return MapEntryDefaultValue; } }
       set {
@@ -6189,11 +6615,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "map_entry" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasMapEntry {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "map_entry" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearMapEntry() {
       _hasBits0 &= ~8;
     }
@@ -6207,16 +6635,19 @@ namespace Google.Protobuf.Reflection {
     /// The parser stores options it doesn't recognize here. See above.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption> UninterpretedOption {
       get { return uninterpretedOption_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MessageOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MessageOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6236,6 +6667,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasMessageSetWireFormat) hash ^= MessageSetWireFormat.GetHashCode();
@@ -6253,11 +6685,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6290,6 +6724,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasMessageSetWireFormat) {
         output.WriteRawTag(8);
@@ -6318,6 +6753,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasMessageSetWireFormat) {
@@ -6343,6 +6779,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MessageOptions other) {
       if (other == null) {
         return;
@@ -6365,6 +6802,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6404,6 +6842,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -6473,19 +6912,23 @@ namespace Google.Protobuf.Reflection {
     private pb::ExtensionSet<FieldOptions> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FieldOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[12]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FieldOptions() {
       OnConstruction();
     }
@@ -6493,6 +6936,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FieldOptions(FieldOptions other) : this() {
       _hasBits0 = other._hasBits0;
       ctype_ = other.ctype_;
@@ -6507,6 +6951,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FieldOptions Clone() {
       return new FieldOptions(this);
     }
@@ -6523,6 +6968,7 @@ namespace Google.Protobuf.Reflection {
     /// release -- sorry, we'll try to include it in a future version!
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.FieldOptions.Types.CType Ctype {
       get { if ((_hasBits0 & 1) != 0) { return ctype_; } else { return CtypeDefaultValue; } }
       set {
@@ -6532,11 +6978,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "ctype" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasCtype {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "ctype" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearCtype() {
       _hasBits0 &= ~1;
     }
@@ -6554,6 +7002,7 @@ namespace Google.Protobuf.Reflection {
     /// false will avoid using packed encoding.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Packed {
       get { if ((_hasBits0 & 2) != 0) { return packed_; } else { return PackedDefaultValue; } }
       set {
@@ -6563,11 +7012,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "packed" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasPacked {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "packed" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearPacked() {
       _hasBits0 &= ~2;
     }
@@ -6591,6 +7042,7 @@ namespace Google.Protobuf.Reflection {
     /// goog.math.Integer.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.FieldOptions.Types.JSType Jstype {
       get { if ((_hasBits0 & 16) != 0) { return jstype_; } else { return JstypeDefaultValue; } }
       set {
@@ -6600,11 +7052,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "jstype" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasJstype {
       get { return (_hasBits0 & 16) != 0; }
     }
     /// <summary>Clears the value of the "jstype" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearJstype() {
       _hasBits0 &= ~16;
     }
@@ -6644,6 +7098,7 @@ namespace Google.Protobuf.Reflection {
     /// been parsed.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Lazy {
       get { if ((_hasBits0 & 8) != 0) { return lazy_; } else { return LazyDefaultValue; } }
       set {
@@ -6653,11 +7108,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "lazy" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasLazy {
       get { return (_hasBits0 & 8) != 0; }
     }
     /// <summary>Clears the value of the "lazy" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearLazy() {
       _hasBits0 &= ~8;
     }
@@ -6674,6 +7131,7 @@ namespace Google.Protobuf.Reflection {
     /// is a formalization for deprecating fields.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Deprecated {
       get { if ((_hasBits0 & 4) != 0) { return deprecated_; } else { return DeprecatedDefaultValue; } }
       set {
@@ -6683,11 +7141,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "deprecated" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDeprecated {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "deprecated" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDeprecated() {
       _hasBits0 &= ~4;
     }
@@ -6701,6 +7161,7 @@ namespace Google.Protobuf.Reflection {
     /// For Google-internal migration only. Do not use.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Weak {
       get { if ((_hasBits0 & 32) != 0) { return weak_; } else { return WeakDefaultValue; } }
       set {
@@ -6710,11 +7171,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "weak" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasWeak {
       get { return (_hasBits0 & 32) != 0; }
     }
     /// <summary>Clears the value of the "weak" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearWeak() {
       _hasBits0 &= ~32;
     }
@@ -6728,16 +7191,19 @@ namespace Google.Protobuf.Reflection {
     /// The parser stores options it doesn't recognize here. See above.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption> UninterpretedOption {
       get { return uninterpretedOption_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FieldOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FieldOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -6759,6 +7225,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasCtype) hash ^= Ctype.GetHashCode();
@@ -6778,11 +7245,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -6823,6 +7292,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasCtype) {
         output.WriteRawTag(8);
@@ -6859,6 +7329,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasCtype) {
@@ -6890,6 +7361,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FieldOptions other) {
       if (other == null) {
         return;
@@ -6918,6 +7390,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -6965,6 +7438,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -7032,6 +7506,7 @@ namespace Google.Protobuf.Reflection {
     #region Nested types
     /// <summary>Container for nested types declared in the FieldOptions message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public enum CType {
         /// <summary>
@@ -7072,19 +7547,23 @@ namespace Google.Protobuf.Reflection {
     internal pb::ExtensionSet<OneofOptions> _extensions;
     private pb::ExtensionSet<OneofOptions> _Extensions { get { return _extensions; } }
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<OneofOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[13]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofOptions() {
       OnConstruction();
     }
@@ -7092,6 +7571,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofOptions(OneofOptions other) : this() {
       uninterpretedOption_ = other.uninterpretedOption_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
@@ -7099,6 +7579,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public OneofOptions Clone() {
       return new OneofOptions(this);
     }
@@ -7112,16 +7593,19 @@ namespace Google.Protobuf.Reflection {
     /// The parser stores options it doesn't recognize here. See above.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption> UninterpretedOption {
       get { return uninterpretedOption_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as OneofOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(OneofOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -7137,6 +7621,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= uninterpretedOption_.GetHashCode();
@@ -7150,11 +7635,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -7171,6 +7658,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       uninterpretedOption_.WriteTo(ref output, _repeated_uninterpretedOption_codec);
       if (_extensions != null) {
@@ -7183,6 +7671,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += uninterpretedOption_.CalculateSize(_repeated_uninterpretedOption_codec);
@@ -7196,6 +7685,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(OneofOptions other) {
       if (other == null) {
         return;
@@ -7206,6 +7696,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -7229,6 +7720,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -7282,19 +7774,23 @@ namespace Google.Protobuf.Reflection {
     private pb::ExtensionSet<EnumOptions> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<EnumOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[14]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumOptions() {
       OnConstruction();
     }
@@ -7302,6 +7798,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumOptions(EnumOptions other) : this() {
       _hasBits0 = other._hasBits0;
       allowAlias_ = other.allowAlias_;
@@ -7312,6 +7809,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumOptions Clone() {
       return new EnumOptions(this);
     }
@@ -7326,6 +7824,7 @@ namespace Google.Protobuf.Reflection {
     /// value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool AllowAlias {
       get { if ((_hasBits0 & 1) != 0) { return allowAlias_; } else { return AllowAliasDefaultValue; } }
       set {
@@ -7335,11 +7834,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "allow_alias" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasAllowAlias {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "allow_alias" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearAllowAlias() {
       _hasBits0 &= ~1;
     }
@@ -7356,6 +7857,7 @@ namespace Google.Protobuf.Reflection {
     /// is a formalization for deprecating enums.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Deprecated {
       get { if ((_hasBits0 & 2) != 0) { return deprecated_; } else { return DeprecatedDefaultValue; } }
       set {
@@ -7365,11 +7867,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "deprecated" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDeprecated {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "deprecated" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDeprecated() {
       _hasBits0 &= ~2;
     }
@@ -7383,16 +7887,19 @@ namespace Google.Protobuf.Reflection {
     /// The parser stores options it doesn't recognize here. See above.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption> UninterpretedOption {
       get { return uninterpretedOption_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as EnumOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(EnumOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -7410,6 +7917,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasAllowAlias) hash ^= AllowAlias.GetHashCode();
@@ -7425,11 +7933,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -7454,6 +7964,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasAllowAlias) {
         output.WriteRawTag(16);
@@ -7474,6 +7985,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasAllowAlias) {
@@ -7493,6 +8005,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(EnumOptions other) {
       if (other == null) {
         return;
@@ -7509,6 +8022,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -7540,6 +8054,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -7601,19 +8116,23 @@ namespace Google.Protobuf.Reflection {
     private pb::ExtensionSet<EnumValueOptions> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<EnumValueOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[15]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumValueOptions() {
       OnConstruction();
     }
@@ -7621,6 +8140,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumValueOptions(EnumValueOptions other) : this() {
       _hasBits0 = other._hasBits0;
       deprecated_ = other.deprecated_;
@@ -7630,6 +8150,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumValueOptions Clone() {
       return new EnumValueOptions(this);
     }
@@ -7646,6 +8167,7 @@ namespace Google.Protobuf.Reflection {
     /// this is a formalization for deprecating enum values.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Deprecated {
       get { if ((_hasBits0 & 1) != 0) { return deprecated_; } else { return DeprecatedDefaultValue; } }
       set {
@@ -7655,11 +8177,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "deprecated" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDeprecated {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "deprecated" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDeprecated() {
       _hasBits0 &= ~1;
     }
@@ -7673,16 +8197,19 @@ namespace Google.Protobuf.Reflection {
     /// The parser stores options it doesn't recognize here. See above.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption> UninterpretedOption {
       get { return uninterpretedOption_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as EnumValueOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(EnumValueOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -7699,6 +8226,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasDeprecated) hash ^= Deprecated.GetHashCode();
@@ -7713,11 +8241,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -7738,6 +8268,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasDeprecated) {
         output.WriteRawTag(8);
@@ -7754,6 +8285,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasDeprecated) {
@@ -7770,6 +8302,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(EnumValueOptions other) {
       if (other == null) {
         return;
@@ -7783,6 +8316,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -7810,6 +8344,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -7867,19 +8402,23 @@ namespace Google.Protobuf.Reflection {
     private pb::ExtensionSet<ServiceOptions> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ServiceOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[16]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ServiceOptions() {
       OnConstruction();
     }
@@ -7887,6 +8426,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ServiceOptions(ServiceOptions other) : this() {
       _hasBits0 = other._hasBits0;
       deprecated_ = other.deprecated_;
@@ -7896,6 +8436,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ServiceOptions Clone() {
       return new ServiceOptions(this);
     }
@@ -7912,6 +8453,7 @@ namespace Google.Protobuf.Reflection {
     /// this is a formalization for deprecating services.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Deprecated {
       get { if ((_hasBits0 & 1) != 0) { return deprecated_; } else { return DeprecatedDefaultValue; } }
       set {
@@ -7921,11 +8463,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "deprecated" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDeprecated {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "deprecated" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDeprecated() {
       _hasBits0 &= ~1;
     }
@@ -7939,16 +8483,19 @@ namespace Google.Protobuf.Reflection {
     /// The parser stores options it doesn't recognize here. See above.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption> UninterpretedOption {
       get { return uninterpretedOption_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ServiceOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ServiceOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -7965,6 +8512,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasDeprecated) hash ^= Deprecated.GetHashCode();
@@ -7979,11 +8527,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -8004,6 +8554,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasDeprecated) {
         output.WriteRawTag(136, 2);
@@ -8020,6 +8571,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasDeprecated) {
@@ -8036,6 +8588,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ServiceOptions other) {
       if (other == null) {
         return;
@@ -8049,6 +8602,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -8076,6 +8630,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -8133,19 +8688,23 @@ namespace Google.Protobuf.Reflection {
     private pb::ExtensionSet<MethodOptions> _Extensions { get { return _extensions; } }
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<MethodOptions> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[17]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MethodOptions() {
       OnConstruction();
     }
@@ -8153,6 +8712,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MethodOptions(MethodOptions other) : this() {
       _hasBits0 = other._hasBits0;
       deprecated_ = other.deprecated_;
@@ -8163,6 +8723,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public MethodOptions Clone() {
       return new MethodOptions(this);
     }
@@ -8179,6 +8740,7 @@ namespace Google.Protobuf.Reflection {
     /// this is a formalization for deprecating methods.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Deprecated {
       get { if ((_hasBits0 & 1) != 0) { return deprecated_; } else { return DeprecatedDefaultValue; } }
       set {
@@ -8188,11 +8750,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "deprecated" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDeprecated {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "deprecated" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDeprecated() {
       _hasBits0 &= ~1;
     }
@@ -8203,6 +8767,7 @@ namespace Google.Protobuf.Reflection {
 
     private global::Google.Protobuf.Reflection.MethodOptions.Types.IdempotencyLevel idempotencyLevel_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.Reflection.MethodOptions.Types.IdempotencyLevel IdempotencyLevel {
       get { if ((_hasBits0 & 2) != 0) { return idempotencyLevel_; } else { return IdempotencyLevelDefaultValue; } }
       set {
@@ -8212,11 +8777,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "idempotency_level" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasIdempotencyLevel {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "idempotency_level" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearIdempotencyLevel() {
       _hasBits0 &= ~2;
     }
@@ -8230,16 +8797,19 @@ namespace Google.Protobuf.Reflection {
     /// The parser stores options it doesn't recognize here. See above.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption> UninterpretedOption {
       get { return uninterpretedOption_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as MethodOptions);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(MethodOptions other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -8257,6 +8827,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (HasDeprecated) hash ^= Deprecated.GetHashCode();
@@ -8272,11 +8843,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -8301,6 +8874,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (HasDeprecated) {
         output.WriteRawTag(136, 2);
@@ -8321,6 +8895,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (HasDeprecated) {
@@ -8340,6 +8915,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(MethodOptions other) {
       if (other == null) {
         return;
@@ -8356,6 +8932,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -8387,6 +8964,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -8438,6 +9016,7 @@ namespace Google.Protobuf.Reflection {
     #region Nested types
     /// <summary>Container for nested types declared in the MethodOptions message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       /// <summary>
       /// Is this method side-effect-free (or safe in HTTP parlance), or idempotent,
@@ -8478,19 +9057,23 @@ namespace Google.Protobuf.Reflection {
     private pb::UnknownFieldSet _unknownFields;
     private int _hasBits0;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<UninterpretedOption> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[18]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UninterpretedOption() {
       OnConstruction();
     }
@@ -8498,6 +9081,7 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UninterpretedOption(UninterpretedOption other) : this() {
       _hasBits0 = other._hasBits0;
       name_ = other.name_.Clone();
@@ -8511,6 +9095,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UninterpretedOption Clone() {
       return new UninterpretedOption(this);
     }
@@ -8521,6 +9106,7 @@ namespace Google.Protobuf.Reflection {
         = pb::FieldCodec.ForMessage(18, global::Google.Protobuf.Reflection.UninterpretedOption.Types.NamePart.Parser);
     private readonly pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption.Types.NamePart> name_ = new pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption.Types.NamePart>();
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.UninterpretedOption.Types.NamePart> Name {
       get { return name_; }
     }
@@ -8535,6 +9121,7 @@ namespace Google.Protobuf.Reflection {
     /// identified it as during parsing. Exactly one of these should be set.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string IdentifierValue {
       get { return identifierValue_ ?? IdentifierValueDefaultValue; }
       set {
@@ -8543,11 +9130,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "identifier_value" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasIdentifierValue {
       get { return identifierValue_ != null; }
     }
     /// <summary>Clears the value of the "identifier_value" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearIdentifierValue() {
       identifierValue_ = null;
     }
@@ -8558,6 +9147,7 @@ namespace Google.Protobuf.Reflection {
 
     private ulong positiveIntValue_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong PositiveIntValue {
       get { if ((_hasBits0 & 1) != 0) { return positiveIntValue_; } else { return PositiveIntValueDefaultValue; } }
       set {
@@ -8567,11 +9157,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "positive_int_value" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasPositiveIntValue {
       get { return (_hasBits0 & 1) != 0; }
     }
     /// <summary>Clears the value of the "positive_int_value" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearPositiveIntValue() {
       _hasBits0 &= ~1;
     }
@@ -8582,6 +9174,7 @@ namespace Google.Protobuf.Reflection {
 
     private long negativeIntValue_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long NegativeIntValue {
       get { if ((_hasBits0 & 2) != 0) { return negativeIntValue_; } else { return NegativeIntValueDefaultValue; } }
       set {
@@ -8591,11 +9184,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "negative_int_value" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasNegativeIntValue {
       get { return (_hasBits0 & 2) != 0; }
     }
     /// <summary>Clears the value of the "negative_int_value" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearNegativeIntValue() {
       _hasBits0 &= ~2;
     }
@@ -8606,6 +9201,7 @@ namespace Google.Protobuf.Reflection {
 
     private double doubleValue_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double DoubleValue {
       get { if ((_hasBits0 & 4) != 0) { return doubleValue_; } else { return DoubleValueDefaultValue; } }
       set {
@@ -8615,11 +9211,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "double_value" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasDoubleValue {
       get { return (_hasBits0 & 4) != 0; }
     }
     /// <summary>Clears the value of the "double_value" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearDoubleValue() {
       _hasBits0 &= ~4;
     }
@@ -8630,6 +9228,7 @@ namespace Google.Protobuf.Reflection {
 
     private pb::ByteString stringValue_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString StringValue {
       get { return stringValue_ ?? StringValueDefaultValue; }
       set {
@@ -8638,11 +9237,13 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "string_value" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasStringValue {
       get { return stringValue_ != null; }
     }
     /// <summary>Clears the value of the "string_value" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearStringValue() {
       stringValue_ = null;
     }
@@ -8653,6 +9254,7 @@ namespace Google.Protobuf.Reflection {
 
     private string aggregateValue_;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string AggregateValue {
       get { return aggregateValue_ ?? AggregateValueDefaultValue; }
       set {
@@ -8661,21 +9263,25 @@ namespace Google.Protobuf.Reflection {
     }
     /// <summary>Gets whether the "aggregate_value" field is set</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool HasAggregateValue {
       get { return aggregateValue_ != null; }
     }
     /// <summary>Clears the value of the "aggregate_value" field</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearAggregateValue() {
       aggregateValue_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as UninterpretedOption);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(UninterpretedOption other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -8694,6 +9300,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= name_.GetHashCode();
@@ -8710,11 +9317,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -8752,6 +9361,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       name_.WriteTo(ref output, _repeated_name_codec);
       if (HasIdentifierValue) {
@@ -8785,6 +9395,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += name_.CalculateSize(_repeated_name_codec);
@@ -8813,6 +9424,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(UninterpretedOption other) {
       if (other == null) {
         return;
@@ -8840,6 +9452,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -8885,6 +9498,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -8928,6 +9542,7 @@ namespace Google.Protobuf.Reflection {
     #region Nested types
     /// <summary>Container for nested types declared in the UninterpretedOption message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       /// <summary>
       /// The name of the uninterpreted option.  Each string represents a segment in
@@ -8945,19 +9560,23 @@ namespace Google.Protobuf.Reflection {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<NamePart> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.Reflection.UninterpretedOption.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NamePart() {
           OnConstruction();
         }
@@ -8965,6 +9584,7 @@ namespace Google.Protobuf.Reflection {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NamePart(NamePart other) : this() {
           _hasBits0 = other._hasBits0;
           namePart_ = other.namePart_;
@@ -8973,6 +9593,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public NamePart Clone() {
           return new NamePart(this);
         }
@@ -8983,6 +9604,7 @@ namespace Google.Protobuf.Reflection {
 
         private string namePart_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string NamePart_ {
           get { return namePart_ ?? NamePart_DefaultValue; }
           set {
@@ -8991,11 +9613,13 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "name_part" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasNamePart_ {
           get { return namePart_ != null; }
         }
         /// <summary>Clears the value of the "name_part" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearNamePart_() {
           namePart_ = null;
         }
@@ -9006,6 +9630,7 @@ namespace Google.Protobuf.Reflection {
 
         private bool isExtension_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool IsExtension {
           get { if ((_hasBits0 & 1) != 0) { return isExtension_; } else { return IsExtensionDefaultValue; } }
           set {
@@ -9015,21 +9640,25 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "is_extension" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasIsExtension {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "is_extension" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearIsExtension() {
           _hasBits0 &= ~1;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as NamePart);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(NamePart other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -9043,6 +9672,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           if (HasNamePart_) hash ^= NamePart_.GetHashCode();
@@ -9054,11 +9684,13 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -9079,6 +9711,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           if (HasNamePart_) {
             output.WriteRawTag(10);
@@ -9095,6 +9728,7 @@ namespace Google.Protobuf.Reflection {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           if (HasNamePart_) {
@@ -9110,6 +9744,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(NamePart other) {
           if (other == null) {
             return;
@@ -9124,6 +9759,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -9149,6 +9785,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -9188,19 +9825,23 @@ namespace Google.Protobuf.Reflection {
     private static readonly pb::MessageParser<SourceCodeInfo> _parser = new pb::MessageParser<SourceCodeInfo>(() => new SourceCodeInfo());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<SourceCodeInfo> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[19]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SourceCodeInfo() {
       OnConstruction();
     }
@@ -9208,12 +9849,14 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SourceCodeInfo(SourceCodeInfo other) : this() {
       location_ = other.location_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SourceCodeInfo Clone() {
       return new SourceCodeInfo(this);
     }
@@ -9269,16 +9912,19 @@ namespace Google.Protobuf.Reflection {
     ///   be recorded in the future.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.SourceCodeInfo.Types.Location> Location {
       get { return location_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as SourceCodeInfo);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(SourceCodeInfo other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -9291,6 +9937,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= location_.GetHashCode();
@@ -9301,11 +9948,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -9319,6 +9968,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       location_.WriteTo(ref output, _repeated_location_codec);
       if (_unknownFields != null) {
@@ -9328,6 +9978,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += location_.CalculateSize(_repeated_location_codec);
@@ -9338,6 +9989,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(SourceCodeInfo other) {
       if (other == null) {
         return;
@@ -9347,6 +9999,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -9368,6 +10021,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -9387,6 +10041,7 @@ namespace Google.Protobuf.Reflection {
     #region Nested types
     /// <summary>Container for nested types declared in the SourceCodeInfo message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class Location : pb::IMessage<Location>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -9396,19 +10051,23 @@ namespace Google.Protobuf.Reflection {
         private static readonly pb::MessageParser<Location> _parser = new pb::MessageParser<Location>(() => new Location());
         private pb::UnknownFieldSet _unknownFields;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<Location> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.Reflection.SourceCodeInfo.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Location() {
           OnConstruction();
         }
@@ -9416,6 +10075,7 @@ namespace Google.Protobuf.Reflection {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Location(Location other) : this() {
           path_ = other.path_.Clone();
           span_ = other.span_.Clone();
@@ -9426,6 +10086,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Location Clone() {
           return new Location(this);
         }
@@ -9461,6 +10122,7 @@ namespace Google.Protobuf.Reflection {
         /// of the label to the terminating semicolon).
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<int> Path {
           get { return path_; }
         }
@@ -9478,6 +10140,7 @@ namespace Google.Protobuf.Reflection {
         /// 1 to each before displaying to a user.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<int> Span {
           get { return span_; }
         }
@@ -9537,6 +10200,7 @@ namespace Google.Protobuf.Reflection {
         ///   // ignored detached comments.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string LeadingComments {
           get { return leadingComments_ ?? LeadingCommentsDefaultValue; }
           set {
@@ -9545,11 +10209,13 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "leading_comments" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasLeadingComments {
           get { return leadingComments_ != null; }
         }
         /// <summary>Clears the value of the "leading_comments" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearLeadingComments() {
           leadingComments_ = null;
         }
@@ -9560,6 +10226,7 @@ namespace Google.Protobuf.Reflection {
 
         private string trailingComments_;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string TrailingComments {
           get { return trailingComments_ ?? TrailingCommentsDefaultValue; }
           set {
@@ -9568,11 +10235,13 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "trailing_comments" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasTrailingComments {
           get { return trailingComments_ != null; }
         }
         /// <summary>Clears the value of the "trailing_comments" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearTrailingComments() {
           trailingComments_ = null;
         }
@@ -9583,16 +10252,19 @@ namespace Google.Protobuf.Reflection {
             = pb::FieldCodec.ForString(50);
         private readonly pbc::RepeatedField<string> leadingDetachedComments_ = new pbc::RepeatedField<string>();
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<string> LeadingDetachedComments {
           get { return leadingDetachedComments_; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as Location);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(Location other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -9609,6 +10281,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           hash ^= path_.GetHashCode();
@@ -9623,11 +10296,13 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -9651,6 +10326,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           path_.WriteTo(ref output, _repeated_path_codec);
           span_.WriteTo(ref output, _repeated_span_codec);
@@ -9670,6 +10346,7 @@ namespace Google.Protobuf.Reflection {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           size += path_.CalculateSize(_repeated_path_codec);
@@ -9688,6 +10365,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(Location other) {
           if (other == null) {
             return;
@@ -9705,6 +10383,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -9744,6 +10423,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
@@ -9798,19 +10478,23 @@ namespace Google.Protobuf.Reflection {
     private static readonly pb::MessageParser<GeneratedCodeInfo> _parser = new pb::MessageParser<GeneratedCodeInfo>(() => new GeneratedCodeInfo());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<GeneratedCodeInfo> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.Reflection.DescriptorReflection.Descriptor.MessageTypes[20]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public GeneratedCodeInfo() {
       OnConstruction();
     }
@@ -9818,12 +10502,14 @@ namespace Google.Protobuf.Reflection {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public GeneratedCodeInfo(GeneratedCodeInfo other) : this() {
       annotation_ = other.annotation_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public GeneratedCodeInfo Clone() {
       return new GeneratedCodeInfo(this);
     }
@@ -9838,16 +10524,19 @@ namespace Google.Protobuf.Reflection {
     /// of its generating .proto file.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.Reflection.GeneratedCodeInfo.Types.Annotation> Annotation {
       get { return annotation_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as GeneratedCodeInfo);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(GeneratedCodeInfo other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -9860,6 +10549,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= annotation_.GetHashCode();
@@ -9870,11 +10560,13 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -9888,6 +10580,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       annotation_.WriteTo(ref output, _repeated_annotation_codec);
       if (_unknownFields != null) {
@@ -9897,6 +10590,7 @@ namespace Google.Protobuf.Reflection {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += annotation_.CalculateSize(_repeated_annotation_codec);
@@ -9907,6 +10601,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(GeneratedCodeInfo other) {
       if (other == null) {
         return;
@@ -9916,6 +10611,7 @@ namespace Google.Protobuf.Reflection {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -9937,6 +10633,7 @@ namespace Google.Protobuf.Reflection {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -9956,6 +10653,7 @@ namespace Google.Protobuf.Reflection {
     #region Nested types
     /// <summary>Container for nested types declared in the GeneratedCodeInfo message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       public sealed partial class Annotation : pb::IMessage<Annotation>
       #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
@@ -9966,19 +10664,23 @@ namespace Google.Protobuf.Reflection {
         private pb::UnknownFieldSet _unknownFields;
         private int _hasBits0;
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pb::MessageParser<Annotation> Parser { get { return _parser; } }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public static pbr::MessageDescriptor Descriptor {
           get { return global::Google.Protobuf.Reflection.GeneratedCodeInfo.Descriptor.NestedTypes[0]; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         pbr::MessageDescriptor pb::IMessage.Descriptor {
           get { return Descriptor; }
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Annotation() {
           OnConstruction();
         }
@@ -9986,6 +10688,7 @@ namespace Google.Protobuf.Reflection {
         partial void OnConstruction();
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Annotation(Annotation other) : this() {
           _hasBits0 = other._hasBits0;
           path_ = other.path_.Clone();
@@ -9996,6 +10699,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public Annotation Clone() {
           return new Annotation(this);
         }
@@ -10010,6 +10714,7 @@ namespace Google.Protobuf.Reflection {
         /// is formatted the same as SourceCodeInfo.Location.path.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public pbc::RepeatedField<int> Path {
           get { return path_; }
         }
@@ -10023,6 +10728,7 @@ namespace Google.Protobuf.Reflection {
         /// Identifies the filesystem path to the original source .proto.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public string SourceFile {
           get { return sourceFile_ ?? SourceFileDefaultValue; }
           set {
@@ -10031,11 +10737,13 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "source_file" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasSourceFile {
           get { return sourceFile_ != null; }
         }
         /// <summary>Clears the value of the "source_file" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearSourceFile() {
           sourceFile_ = null;
         }
@@ -10050,6 +10758,7 @@ namespace Google.Protobuf.Reflection {
         /// that relates to the identified object.
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int Begin {
           get { if ((_hasBits0 & 1) != 0) { return begin_; } else { return BeginDefaultValue; } }
           set {
@@ -10059,11 +10768,13 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "begin" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasBegin {
           get { return (_hasBits0 & 1) != 0; }
         }
         /// <summary>Clears the value of the "begin" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearBegin() {
           _hasBits0 &= ~1;
         }
@@ -10079,6 +10790,7 @@ namespace Google.Protobuf.Reflection {
         /// the last relevant byte (so the length of the text = end - begin).
         /// </summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int End {
           get { if ((_hasBits0 & 2) != 0) { return end_; } else { return EndDefaultValue; } }
           set {
@@ -10088,21 +10800,25 @@ namespace Google.Protobuf.Reflection {
         }
         /// <summary>Gets whether the "end" field is set</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool HasEnd {
           get { return (_hasBits0 & 2) != 0; }
         }
         /// <summary>Clears the value of the "end" field</summary>
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void ClearEnd() {
           _hasBits0 &= ~2;
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override bool Equals(object other) {
           return Equals(other as Annotation);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public bool Equals(Annotation other) {
           if (ReferenceEquals(other, null)) {
             return false;
@@ -10118,6 +10834,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override int GetHashCode() {
           int hash = 1;
           hash ^= path_.GetHashCode();
@@ -10131,11 +10848,13 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public override string ToString() {
           return pb::JsonFormatter.ToDiagnosticString(this);
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void WriteTo(pb::CodedOutputStream output) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           output.WriteRawMessage(this);
@@ -10161,6 +10880,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
           path_.WriteTo(ref output, _repeated_path_codec);
           if (HasSourceFile) {
@@ -10182,6 +10902,7 @@ namespace Google.Protobuf.Reflection {
         #endif
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public int CalculateSize() {
           int size = 0;
           size += path_.CalculateSize(_repeated_path_codec);
@@ -10201,6 +10922,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(Annotation other) {
           if (other == null) {
             return;
@@ -10219,6 +10941,7 @@ namespace Google.Protobuf.Reflection {
         }
 
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         public void MergeFrom(pb::CodedInputStream input) {
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
           input.ReadRawMessage(this);
@@ -10253,6 +10976,7 @@ namespace Google.Protobuf.Reflection {
 
         #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+        [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
         void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
           uint tag;
           while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Any.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Any.cs
index 60ae03da94..7b5019a8ac 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Any.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Any.cs
@@ -130,19 +130,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Any> _parser = new pb::MessageParser<Any>(() => new Any());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Any> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.AnyReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Any() {
       OnConstruction();
     }
@@ -150,6 +154,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Any(Any other) : this() {
       typeUrl_ = other.typeUrl_;
       value_ = other.value_;
@@ -157,6 +162,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Any Clone() {
       return new Any(this);
     }
@@ -194,6 +200,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// used with implementation specific semantics.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string TypeUrl {
       get { return typeUrl_; }
       set {
@@ -208,6 +215,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Must be a valid serialized protocol buffer of the above specified type.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString Value {
       get { return value_; }
       set {
@@ -216,11 +224,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Any);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Any other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -234,6 +244,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (TypeUrl.Length != 0) hash ^= TypeUrl.GetHashCode();
@@ -245,11 +256,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -270,6 +283,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (TypeUrl.Length != 0) {
         output.WriteRawTag(10);
@@ -286,6 +300,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (TypeUrl.Length != 0) {
@@ -301,6 +316,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Any other) {
       if (other == null) {
         return;
@@ -315,6 +331,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -340,6 +357,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Api.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Api.cs
index 7c65ac761d..58a658e077 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Api.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Api.cs
@@ -72,19 +72,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Api> _parser = new pb::MessageParser<Api>(() => new Api());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Api> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.ApiReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Api() {
       OnConstruction();
     }
@@ -92,6 +96,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Api(Api other) : this() {
       name_ = other.name_;
       methods_ = other.methods_.Clone();
@@ -104,6 +109,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Api Clone() {
       return new Api(this);
     }
@@ -116,6 +122,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// followed by the interface's simple name.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -132,6 +139,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The methods of this interface, in unspecified order.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Method> Methods {
       get { return methods_; }
     }
@@ -145,6 +153,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Any metadata attached to the interface.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Option> Options {
       get { return options_; }
     }
@@ -174,6 +183,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// experimental, non-GA interfaces.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Version {
       get { return version_; }
       set {
@@ -189,6 +199,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// message.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.SourceContext SourceContext {
       get { return sourceContext_; }
       set {
@@ -205,6 +216,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Included interfaces. See [Mixin][].
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Mixin> Mixins {
       get { return mixins_; }
     }
@@ -216,6 +228,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The source syntax of the service.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Syntax Syntax {
       get { return syntax_; }
       set {
@@ -224,11 +237,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Api);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Api other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -247,6 +262,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Name.Length != 0) hash ^= Name.GetHashCode();
@@ -263,11 +279,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -299,6 +317,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Name.Length != 0) {
         output.WriteRawTag(10);
@@ -326,6 +345,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Name.Length != 0) {
@@ -350,6 +370,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Api other) {
       if (other == null) {
         return;
@@ -376,6 +397,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -424,6 +446,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -480,19 +503,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Method> _parser = new pb::MessageParser<Method>(() => new Method());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Method> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.ApiReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Method() {
       OnConstruction();
     }
@@ -500,6 +527,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Method(Method other) : this() {
       name_ = other.name_;
       requestTypeUrl_ = other.requestTypeUrl_;
@@ -512,6 +540,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Method Clone() {
       return new Method(this);
     }
@@ -523,6 +552,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The simple name of this method.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -537,6 +567,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// A URL of the input message type.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string RequestTypeUrl {
       get { return requestTypeUrl_; }
       set {
@@ -551,6 +582,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// If true, the request is streamed.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool RequestStreaming {
       get { return requestStreaming_; }
       set {
@@ -565,6 +597,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The URL of the output message type.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string ResponseTypeUrl {
       get { return responseTypeUrl_; }
       set {
@@ -579,6 +612,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// If true, the response is streamed.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool ResponseStreaming {
       get { return responseStreaming_; }
       set {
@@ -595,6 +629,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Any metadata attached to the method.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Option> Options {
       get { return options_; }
     }
@@ -606,6 +641,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The source syntax of this method.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Syntax Syntax {
       get { return syntax_; }
       set {
@@ -614,11 +650,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Method);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Method other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -637,6 +675,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Name.Length != 0) hash ^= Name.GetHashCode();
@@ -653,11 +692,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -695,6 +736,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Name.Length != 0) {
         output.WriteRawTag(10);
@@ -728,6 +770,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Name.Length != 0) {
@@ -756,6 +799,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Method other) {
       if (other == null) {
         return;
@@ -783,6 +827,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -828,6 +873,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -958,19 +1004,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Mixin> _parser = new pb::MessageParser<Mixin>(() => new Mixin());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Mixin> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.ApiReflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Mixin() {
       OnConstruction();
     }
@@ -978,6 +1028,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Mixin(Mixin other) : this() {
       name_ = other.name_;
       root_ = other.root_;
@@ -985,6 +1036,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Mixin Clone() {
       return new Mixin(this);
     }
@@ -996,6 +1048,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The fully qualified name of the interface which is included.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -1011,6 +1064,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// are rooted.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Root {
       get { return root_; }
       set {
@@ -1019,11 +1073,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Mixin);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Mixin other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1037,6 +1093,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Name.Length != 0) hash ^= Name.GetHashCode();
@@ -1048,11 +1105,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1073,6 +1132,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Name.Length != 0) {
         output.WriteRawTag(10);
@@ -1089,6 +1149,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Name.Length != 0) {
@@ -1104,6 +1165,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Mixin other) {
       if (other == null) {
         return;
@@ -1118,6 +1180,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1143,6 +1206,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Duration.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Duration.cs
index 2a653a3754..b46f4d2936 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Duration.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Duration.cs
@@ -108,19 +108,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Duration> _parser = new pb::MessageParser<Duration>(() => new Duration());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Duration> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.DurationReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Duration() {
       OnConstruction();
     }
@@ -128,6 +132,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Duration(Duration other) : this() {
       seconds_ = other.seconds_;
       nanos_ = other.nanos_;
@@ -135,6 +140,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Duration Clone() {
       return new Duration(this);
     }
@@ -148,6 +154,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Seconds {
       get { return seconds_; }
       set {
@@ -167,6 +174,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// to +999,999,999 inclusive.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Nanos {
       get { return nanos_; }
       set {
@@ -175,11 +183,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Duration);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Duration other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -193,6 +203,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Seconds != 0L) hash ^= Seconds.GetHashCode();
@@ -204,11 +215,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -229,6 +242,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Seconds != 0L) {
         output.WriteRawTag(8);
@@ -245,6 +259,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Seconds != 0L) {
@@ -260,6 +275,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Duration other) {
       if (other == null) {
         return;
@@ -274,6 +290,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -299,6 +316,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Empty.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Empty.cs
index e2e35182fd..073b59eb0d 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Empty.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Empty.cs
@@ -58,19 +58,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Empty> _parser = new pb::MessageParser<Empty>(() => new Empty());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Empty> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.EmptyReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Empty() {
       OnConstruction();
     }
@@ -78,21 +82,25 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Empty(Empty other) : this() {
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Empty Clone() {
       return new Empty(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Empty);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Empty other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -104,6 +112,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (_unknownFields != null) {
@@ -113,11 +122,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -130,6 +141,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
@@ -138,6 +150,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (_unknownFields != null) {
@@ -147,6 +160,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Empty other) {
       if (other == null) {
         return;
@@ -155,6 +169,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -172,6 +187,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/FieldMask.cs b/csharp/src/Google.Protobuf/WellKnownTypes/FieldMask.cs
index d5da31441e..e90c3d571d 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/FieldMask.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/FieldMask.cs
@@ -247,19 +247,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<FieldMask> _parser = new pb::MessageParser<FieldMask>(() => new FieldMask());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FieldMask> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.FieldMaskReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FieldMask() {
       OnConstruction();
     }
@@ -267,12 +271,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FieldMask(FieldMask other) : this() {
       paths_ = other.paths_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FieldMask Clone() {
       return new FieldMask(this);
     }
@@ -286,16 +292,19 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The set of field mask paths.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> Paths {
       get { return paths_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FieldMask);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FieldMask other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -308,6 +317,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= paths_.GetHashCode();
@@ -318,11 +328,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -336,6 +348,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       paths_.WriteTo(ref output, _repeated_paths_codec);
       if (_unknownFields != null) {
@@ -345,6 +358,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += paths_.CalculateSize(_repeated_paths_codec);
@@ -355,6 +369,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FieldMask other) {
       if (other == null) {
         return;
@@ -364,6 +379,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -385,6 +401,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/SourceContext.cs b/csharp/src/Google.Protobuf/WellKnownTypes/SourceContext.cs
index 5fe9b89536..58c23cea1d 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/SourceContext.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/SourceContext.cs
@@ -52,19 +52,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<SourceContext> _parser = new pb::MessageParser<SourceContext>(() => new SourceContext());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<SourceContext> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.SourceContextReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SourceContext() {
       OnConstruction();
     }
@@ -72,12 +76,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SourceContext(SourceContext other) : this() {
       fileName_ = other.fileName_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public SourceContext Clone() {
       return new SourceContext(this);
     }
@@ -90,6 +96,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// protobuf element.  For example: `"google/protobuf/source_context.proto"`.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string FileName {
       get { return fileName_; }
       set {
@@ -98,11 +105,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as SourceContext);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(SourceContext other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -115,6 +124,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (FileName.Length != 0) hash ^= FileName.GetHashCode();
@@ -125,11 +135,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -146,6 +158,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (FileName.Length != 0) {
         output.WriteRawTag(10);
@@ -158,6 +171,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (FileName.Length != 0) {
@@ -170,6 +184,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(SourceContext other) {
       if (other == null) {
         return;
@@ -181,6 +196,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -202,6 +218,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Struct.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Struct.cs
index 0bbb1fcdf9..b32b76c0a5 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Struct.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Struct.cs
@@ -85,19 +85,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Struct> _parser = new pb::MessageParser<Struct>(() => new Struct());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Struct> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.StructReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Struct() {
       OnConstruction();
     }
@@ -105,12 +109,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Struct(Struct other) : this() {
       fields_ = other.fields_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Struct Clone() {
       return new Struct(this);
     }
@@ -124,16 +130,19 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Unordered map of dynamically typed values.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::MapField<string, global::Google.Protobuf.WellKnownTypes.Value> Fields {
       get { return fields_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Struct);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Struct other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -146,6 +155,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= Fields.GetHashCode();
@@ -156,11 +166,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -174,6 +186,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       fields_.WriteTo(ref output, _map_fields_codec);
       if (_unknownFields != null) {
@@ -183,6 +196,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += fields_.CalculateSize(_map_fields_codec);
@@ -193,6 +207,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Struct other) {
       if (other == null) {
         return;
@@ -202,6 +217,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -223,6 +239,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -257,19 +274,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Value> _parser = new pb::MessageParser<Value>(() => new Value());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Value> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.StructReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Value() {
       OnConstruction();
     }
@@ -277,6 +298,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Value(Value other) : this() {
       switch (other.KindCase) {
         case KindOneofCase.NullValue:
@@ -303,6 +325,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Value Clone() {
       return new Value(this);
     }
@@ -313,6 +336,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Represents a null value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.NullValue NullValue {
       get { return kindCase_ == KindOneofCase.NullValue ? (global::Google.Protobuf.WellKnownTypes.NullValue) kind_ : global::Google.Protobuf.WellKnownTypes.NullValue.NullValue; }
       set {
@@ -327,6 +351,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Represents a double value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double NumberValue {
       get { return kindCase_ == KindOneofCase.NumberValue ? (double) kind_ : 0D; }
       set {
@@ -341,6 +366,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Represents a string value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string StringValue {
       get { return kindCase_ == KindOneofCase.StringValue ? (string) kind_ : ""; }
       set {
@@ -355,6 +381,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Represents a boolean value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool BoolValue {
       get { return kindCase_ == KindOneofCase.BoolValue ? (bool) kind_ : false; }
       set {
@@ -369,6 +396,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Represents a structured value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Struct StructValue {
       get { return kindCase_ == KindOneofCase.StructValue ? (global::Google.Protobuf.WellKnownTypes.Struct) kind_ : null; }
       set {
@@ -383,6 +411,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Represents a repeated `Value`.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.ListValue ListValue {
       get { return kindCase_ == KindOneofCase.ListValue ? (global::Google.Protobuf.WellKnownTypes.ListValue) kind_ : null; }
       set {
@@ -404,22 +433,26 @@ namespace Google.Protobuf.WellKnownTypes {
     }
     private KindOneofCase kindCase_ = KindOneofCase.None;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public KindOneofCase KindCase {
       get { return kindCase_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void ClearKind() {
       kindCase_ = KindOneofCase.None;
       kind_ = null;
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Value);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Value other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -438,6 +471,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (kindCase_ == KindOneofCase.NullValue) hash ^= NullValue.GetHashCode();
@@ -454,11 +488,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -495,6 +531,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (kindCase_ == KindOneofCase.NullValue) {
         output.WriteRawTag(8);
@@ -527,6 +564,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (kindCase_ == KindOneofCase.NullValue) {
@@ -554,6 +592,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Value other) {
       if (other == null) {
         return;
@@ -589,6 +628,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -641,6 +681,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -703,19 +744,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<ListValue> _parser = new pb::MessageParser<ListValue>(() => new ListValue());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<ListValue> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.StructReflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ListValue() {
       OnConstruction();
     }
@@ -723,12 +768,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ListValue(ListValue other) : this() {
       values_ = other.values_.Clone();
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ListValue Clone() {
       return new ListValue(this);
     }
@@ -742,16 +789,19 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Repeated field of dynamically typed values.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Value> Values {
       get { return values_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as ListValue);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(ListValue other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -764,6 +814,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       hash ^= values_.GetHashCode();
@@ -774,11 +825,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -792,6 +845,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       values_.WriteTo(ref output, _repeated_values_codec);
       if (_unknownFields != null) {
@@ -801,6 +855,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       size += values_.CalculateSize(_repeated_values_codec);
@@ -811,6 +866,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(ListValue other) {
       if (other == null) {
         return;
@@ -820,6 +876,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -841,6 +898,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Timestamp.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Timestamp.cs
index 2fb1b4d164..e981dc2a01 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Timestamp.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Timestamp.cs
@@ -139,19 +139,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Timestamp> _parser = new pb::MessageParser<Timestamp>(() => new Timestamp());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Timestamp> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.TimestampReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Timestamp() {
       OnConstruction();
     }
@@ -159,6 +163,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Timestamp(Timestamp other) : this() {
       seconds_ = other.seconds_;
       nanos_ = other.nanos_;
@@ -166,6 +171,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Timestamp Clone() {
       return new Timestamp(this);
     }
@@ -179,6 +185,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// 9999-12-31T23:59:59Z inclusive.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Seconds {
       get { return seconds_; }
       set {
@@ -196,6 +203,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// inclusive.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Nanos {
       get { return nanos_; }
       set {
@@ -204,11 +212,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Timestamp);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Timestamp other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -222,6 +232,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Seconds != 0L) hash ^= Seconds.GetHashCode();
@@ -233,11 +244,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -258,6 +271,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Seconds != 0L) {
         output.WriteRawTag(8);
@@ -274,6 +288,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Seconds != 0L) {
@@ -289,6 +304,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Timestamp other) {
       if (other == null) {
         return;
@@ -303,6 +319,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -328,6 +345,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Type.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Type.cs
index f5dfdb7e3e..120f31a90a 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Type.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Type.cs
@@ -102,19 +102,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Type> _parser = new pb::MessageParser<Type>(() => new Type());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Type> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.TypeReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Type() {
       OnConstruction();
     }
@@ -122,6 +126,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Type(Type other) : this() {
       name_ = other.name_;
       fields_ = other.fields_.Clone();
@@ -133,6 +138,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Type Clone() {
       return new Type(this);
     }
@@ -144,6 +150,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The fully qualified message name.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -160,6 +167,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The list of fields.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Field> Fields {
       get { return fields_; }
     }
@@ -173,6 +181,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The list of types appearing in `oneof` definitions in this type.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<string> Oneofs {
       get { return oneofs_; }
     }
@@ -186,6 +195,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The protocol buffer options.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Option> Options {
       get { return options_; }
     }
@@ -197,6 +207,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The source context.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.SourceContext SourceContext {
       get { return sourceContext_; }
       set {
@@ -211,6 +222,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The source syntax.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Syntax Syntax {
       get { return syntax_; }
       set {
@@ -219,11 +231,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Type);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Type other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -241,6 +255,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Name.Length != 0) hash ^= Name.GetHashCode();
@@ -256,11 +271,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -288,6 +305,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Name.Length != 0) {
         output.WriteRawTag(10);
@@ -311,6 +329,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Name.Length != 0) {
@@ -332,6 +351,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Type other) {
       if (other == null) {
         return;
@@ -355,6 +375,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -399,6 +420,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -451,19 +473,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Field> _parser = new pb::MessageParser<Field>(() => new Field());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Field> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.TypeReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Field() {
       OnConstruction();
     }
@@ -471,6 +497,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Field(Field other) : this() {
       kind_ = other.kind_;
       cardinality_ = other.cardinality_;
@@ -486,6 +513,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Field Clone() {
       return new Field(this);
     }
@@ -497,6 +525,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The field type.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Field.Types.Kind Kind {
       get { return kind_; }
       set {
@@ -511,6 +540,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The field cardinality.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Field.Types.Cardinality Cardinality {
       get { return cardinality_; }
       set {
@@ -525,6 +555,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The field number.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Number {
       get { return number_; }
       set {
@@ -539,6 +570,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The field name.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -554,6 +586,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// types. Example: `"type.googleapis.com/google.protobuf.Timestamp"`.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string TypeUrl {
       get { return typeUrl_; }
       set {
@@ -569,6 +602,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// types. The first type has index 1; zero means the type is not in the list.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int OneofIndex {
       get { return oneofIndex_; }
       set {
@@ -583,6 +617,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Whether to use alternative packed wire representation.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Packed {
       get { return packed_; }
       set {
@@ -599,6 +634,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The protocol buffer options.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Option> Options {
       get { return options_; }
     }
@@ -610,6 +646,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The field JSON name.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string JsonName {
       get { return jsonName_; }
       set {
@@ -624,6 +661,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The string value of the default value of this field. Proto2 syntax only.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string DefaultValue {
       get { return defaultValue_; }
       set {
@@ -632,11 +670,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Field);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Field other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -658,6 +698,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Kind != global::Google.Protobuf.WellKnownTypes.Field.Types.Kind.TypeUnknown) hash ^= Kind.GetHashCode();
@@ -677,11 +718,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -731,6 +774,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Kind != global::Google.Protobuf.WellKnownTypes.Field.Types.Kind.TypeUnknown) {
         output.WriteRawTag(8);
@@ -776,6 +820,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Kind != global::Google.Protobuf.WellKnownTypes.Field.Types.Kind.TypeUnknown) {
@@ -813,6 +858,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Field other) {
       if (other == null) {
         return;
@@ -849,6 +895,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -906,6 +953,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -961,6 +1009,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #region Nested types
     /// <summary>Container for nested types declared in the Field message type.</summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static partial class Types {
       /// <summary>
       /// Basic field types.
@@ -1082,19 +1131,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Enum> _parser = new pb::MessageParser<Enum>(() => new Enum());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Enum> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.TypeReflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Enum() {
       OnConstruction();
     }
@@ -1102,6 +1155,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Enum(Enum other) : this() {
       name_ = other.name_;
       enumvalue_ = other.enumvalue_.Clone();
@@ -1112,6 +1166,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Enum Clone() {
       return new Enum(this);
     }
@@ -1123,6 +1178,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Enum type name.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -1139,6 +1195,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Enum value definitions.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.EnumValue> Enumvalue {
       get { return enumvalue_; }
     }
@@ -1152,6 +1209,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Protocol buffer options.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Option> Options {
       get { return options_; }
     }
@@ -1163,6 +1221,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The source context.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.SourceContext SourceContext {
       get { return sourceContext_; }
       set {
@@ -1177,6 +1236,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The source syntax.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Syntax Syntax {
       get { return syntax_; }
       set {
@@ -1185,11 +1245,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Enum);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Enum other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1206,6 +1268,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Name.Length != 0) hash ^= Name.GetHashCode();
@@ -1220,11 +1283,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1251,6 +1316,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Name.Length != 0) {
         output.WriteRawTag(10);
@@ -1273,6 +1339,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Name.Length != 0) {
@@ -1293,6 +1360,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Enum other) {
       if (other == null) {
         return;
@@ -1315,6 +1383,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1355,6 +1424,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1403,19 +1473,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<EnumValue> _parser = new pb::MessageParser<EnumValue>(() => new EnumValue());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<EnumValue> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.TypeReflection.Descriptor.MessageTypes[3]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumValue() {
       OnConstruction();
     }
@@ -1423,6 +1497,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumValue(EnumValue other) : this() {
       name_ = other.name_;
       number_ = other.number_;
@@ -1431,6 +1506,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public EnumValue Clone() {
       return new EnumValue(this);
     }
@@ -1442,6 +1518,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Enum value name.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -1456,6 +1533,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Enum value number.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Number {
       get { return number_; }
       set {
@@ -1472,16 +1550,19 @@ namespace Google.Protobuf.WellKnownTypes {
     /// Protocol buffer options.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pbc::RepeatedField<global::Google.Protobuf.WellKnownTypes.Option> Options {
       get { return options_; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as EnumValue);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(EnumValue other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1496,6 +1577,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Name.Length != 0) hash ^= Name.GetHashCode();
@@ -1508,11 +1590,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1534,6 +1618,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Name.Length != 0) {
         output.WriteRawTag(10);
@@ -1551,6 +1636,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Name.Length != 0) {
@@ -1567,6 +1653,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(EnumValue other) {
       if (other == null) {
         return;
@@ -1582,6 +1669,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1611,6 +1699,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1649,19 +1738,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Option> _parser = new pb::MessageParser<Option>(() => new Option());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Option> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.TypeReflection.Descriptor.MessageTypes[4]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Option() {
       OnConstruction();
     }
@@ -1669,6 +1762,7 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Option(Option other) : this() {
       name_ = other.name_;
       value_ = other.value_ != null ? other.value_.Clone() : null;
@@ -1676,6 +1770,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Option Clone() {
       return new Option(this);
     }
@@ -1690,6 +1785,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// `"google.api.http"`.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Name {
       get { return name_; }
       set {
@@ -1707,6 +1803,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// value using the google.protobuf.Int32Value type.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public global::Google.Protobuf.WellKnownTypes.Any Value {
       get { return value_; }
       set {
@@ -1715,11 +1812,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Option);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Option other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1733,6 +1832,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Name.Length != 0) hash ^= Name.GetHashCode();
@@ -1744,11 +1844,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1769,6 +1871,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Name.Length != 0) {
         output.WriteRawTag(10);
@@ -1785,6 +1888,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Name.Length != 0) {
@@ -1800,6 +1904,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Option other) {
       if (other == null) {
         return;
@@ -1817,6 +1922,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1845,6 +1951,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Wrappers.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Wrappers.cs
index 01d31216e8..29c04b36b4 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Wrappers.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Wrappers.cs
@@ -66,19 +66,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<DoubleValue> _parser = new pb::MessageParser<DoubleValue>(() => new DoubleValue());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<DoubleValue> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.WrappersReflection.Descriptor.MessageTypes[0]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DoubleValue() {
       OnConstruction();
     }
@@ -86,12 +90,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DoubleValue(DoubleValue other) : this() {
       value_ = other.value_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public DoubleValue Clone() {
       return new DoubleValue(this);
     }
@@ -103,6 +109,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The double value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public double Value {
       get { return value_; }
       set {
@@ -111,11 +118,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as DoubleValue);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(DoubleValue other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -128,6 +137,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value != 0D) hash ^= pbc::ProtobufEqualityComparers.BitwiseDoubleEqualityComparer.GetHashCode(Value);
@@ -138,11 +148,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -159,6 +171,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value != 0D) {
         output.WriteRawTag(9);
@@ -171,6 +184,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value != 0D) {
@@ -183,6 +197,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(DoubleValue other) {
       if (other == null) {
         return;
@@ -194,6 +209,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -215,6 +231,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -246,19 +263,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<FloatValue> _parser = new pb::MessageParser<FloatValue>(() => new FloatValue());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<FloatValue> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.WrappersReflection.Descriptor.MessageTypes[1]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FloatValue() {
       OnConstruction();
     }
@@ -266,12 +287,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FloatValue(FloatValue other) : this() {
       value_ = other.value_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public FloatValue Clone() {
       return new FloatValue(this);
     }
@@ -283,6 +306,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The float value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public float Value {
       get { return value_; }
       set {
@@ -291,11 +315,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as FloatValue);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(FloatValue other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -308,6 +334,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value != 0F) hash ^= pbc::ProtobufEqualityComparers.BitwiseSingleEqualityComparer.GetHashCode(Value);
@@ -318,11 +345,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -339,6 +368,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value != 0F) {
         output.WriteRawTag(13);
@@ -351,6 +381,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value != 0F) {
@@ -363,6 +394,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(FloatValue other) {
       if (other == null) {
         return;
@@ -374,6 +406,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -395,6 +428,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -426,19 +460,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Int64Value> _parser = new pb::MessageParser<Int64Value>(() => new Int64Value());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Int64Value> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.WrappersReflection.Descriptor.MessageTypes[2]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int64Value() {
       OnConstruction();
     }
@@ -446,12 +484,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int64Value(Int64Value other) : this() {
       value_ = other.value_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int64Value Clone() {
       return new Int64Value(this);
     }
@@ -463,6 +503,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The int64 value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public long Value {
       get { return value_; }
       set {
@@ -471,11 +512,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Int64Value);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Int64Value other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -488,6 +531,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value != 0L) hash ^= Value.GetHashCode();
@@ -498,11 +542,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -519,6 +565,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value != 0L) {
         output.WriteRawTag(8);
@@ -531,6 +578,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value != 0L) {
@@ -543,6 +591,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Int64Value other) {
       if (other == null) {
         return;
@@ -554,6 +603,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -575,6 +625,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -606,19 +657,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<UInt64Value> _parser = new pb::MessageParser<UInt64Value>(() => new UInt64Value());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<UInt64Value> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.WrappersReflection.Descriptor.MessageTypes[3]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UInt64Value() {
       OnConstruction();
     }
@@ -626,12 +681,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UInt64Value(UInt64Value other) : this() {
       value_ = other.value_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UInt64Value Clone() {
       return new UInt64Value(this);
     }
@@ -643,6 +700,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The uint64 value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public ulong Value {
       get { return value_; }
       set {
@@ -651,11 +709,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as UInt64Value);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(UInt64Value other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -668,6 +728,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value != 0UL) hash ^= Value.GetHashCode();
@@ -678,11 +739,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -699,6 +762,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value != 0UL) {
         output.WriteRawTag(8);
@@ -711,6 +775,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value != 0UL) {
@@ -723,6 +788,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(UInt64Value other) {
       if (other == null) {
         return;
@@ -734,6 +800,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -755,6 +822,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -786,19 +854,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<Int32Value> _parser = new pb::MessageParser<Int32Value>(() => new Int32Value());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<Int32Value> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.WrappersReflection.Descriptor.MessageTypes[4]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int32Value() {
       OnConstruction();
     }
@@ -806,12 +878,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int32Value(Int32Value other) : this() {
       value_ = other.value_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public Int32Value Clone() {
       return new Int32Value(this);
     }
@@ -823,6 +897,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The int32 value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int Value {
       get { return value_; }
       set {
@@ -831,11 +906,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as Int32Value);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(Int32Value other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -848,6 +925,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value != 0) hash ^= Value.GetHashCode();
@@ -858,11 +936,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -879,6 +959,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value != 0) {
         output.WriteRawTag(8);
@@ -891,6 +972,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value != 0) {
@@ -903,6 +985,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(Int32Value other) {
       if (other == null) {
         return;
@@ -914,6 +997,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -935,6 +1019,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -966,19 +1051,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<UInt32Value> _parser = new pb::MessageParser<UInt32Value>(() => new UInt32Value());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<UInt32Value> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.WrappersReflection.Descriptor.MessageTypes[5]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UInt32Value() {
       OnConstruction();
     }
@@ -986,12 +1075,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UInt32Value(UInt32Value other) : this() {
       value_ = other.value_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public UInt32Value Clone() {
       return new UInt32Value(this);
     }
@@ -1003,6 +1094,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The uint32 value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public uint Value {
       get { return value_; }
       set {
@@ -1011,11 +1103,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as UInt32Value);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(UInt32Value other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1028,6 +1122,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value != 0) hash ^= Value.GetHashCode();
@@ -1038,11 +1133,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1059,6 +1156,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value != 0) {
         output.WriteRawTag(8);
@@ -1071,6 +1169,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value != 0) {
@@ -1083,6 +1182,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(UInt32Value other) {
       if (other == null) {
         return;
@@ -1094,6 +1194,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1115,6 +1216,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1146,19 +1248,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<BoolValue> _parser = new pb::MessageParser<BoolValue>(() => new BoolValue());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<BoolValue> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.WrappersReflection.Descriptor.MessageTypes[6]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BoolValue() {
       OnConstruction();
     }
@@ -1166,12 +1272,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BoolValue(BoolValue other) : this() {
       value_ = other.value_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BoolValue Clone() {
       return new BoolValue(this);
     }
@@ -1183,6 +1291,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The bool value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Value {
       get { return value_; }
       set {
@@ -1191,11 +1300,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as BoolValue);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(BoolValue other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1208,6 +1319,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value != false) hash ^= Value.GetHashCode();
@@ -1218,11 +1330,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1239,6 +1353,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value != false) {
         output.WriteRawTag(8);
@@ -1251,6 +1366,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value != false) {
@@ -1263,6 +1379,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(BoolValue other) {
       if (other == null) {
         return;
@@ -1274,6 +1391,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1295,6 +1413,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1326,19 +1445,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<StringValue> _parser = new pb::MessageParser<StringValue>(() => new StringValue());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<StringValue> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.WrappersReflection.Descriptor.MessageTypes[7]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public StringValue() {
       OnConstruction();
     }
@@ -1346,12 +1469,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public StringValue(StringValue other) : this() {
       value_ = other.value_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public StringValue Clone() {
       return new StringValue(this);
     }
@@ -1363,6 +1488,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The string value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public string Value {
       get { return value_; }
       set {
@@ -1371,11 +1497,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as StringValue);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(StringValue other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1388,6 +1516,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value.Length != 0) hash ^= Value.GetHashCode();
@@ -1398,11 +1527,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1419,6 +1550,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value.Length != 0) {
         output.WriteRawTag(10);
@@ -1431,6 +1563,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value.Length != 0) {
@@ -1443,6 +1576,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(StringValue other) {
       if (other == null) {
         return;
@@ -1454,6 +1588,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1475,6 +1610,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {
@@ -1506,19 +1642,23 @@ namespace Google.Protobuf.WellKnownTypes {
     private static readonly pb::MessageParser<BytesValue> _parser = new pb::MessageParser<BytesValue>(() => new BytesValue());
     private pb::UnknownFieldSet _unknownFields;
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pb::MessageParser<BytesValue> Parser { get { return _parser; } }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public static pbr::MessageDescriptor Descriptor {
       get { return global::Google.Protobuf.WellKnownTypes.WrappersReflection.Descriptor.MessageTypes[8]; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     pbr::MessageDescriptor pb::IMessage.Descriptor {
       get { return Descriptor; }
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BytesValue() {
       OnConstruction();
     }
@@ -1526,12 +1666,14 @@ namespace Google.Protobuf.WellKnownTypes {
     partial void OnConstruction();
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BytesValue(BytesValue other) : this() {
       value_ = other.value_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public BytesValue Clone() {
       return new BytesValue(this);
     }
@@ -1543,6 +1685,7 @@ namespace Google.Protobuf.WellKnownTypes {
     /// The bytes value.
     /// </summary>
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public pb::ByteString Value {
       get { return value_; }
       set {
@@ -1551,11 +1694,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
       return Equals(other as BytesValue);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public bool Equals(BytesValue other) {
       if (ReferenceEquals(other, null)) {
         return false;
@@ -1568,6 +1713,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override int GetHashCode() {
       int hash = 1;
       if (Value.Length != 0) hash ^= Value.GetHashCode();
@@ -1578,11 +1724,13 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override string ToString() {
       return pb::JsonFormatter.ToDiagnosticString(this);
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void WriteTo(pb::CodedOutputStream output) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       output.WriteRawMessage(this);
@@ -1599,6 +1747,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalWriteTo(ref pb::WriteContext output) {
       if (Value.Length != 0) {
         output.WriteRawTag(10);
@@ -1611,6 +1760,7 @@ namespace Google.Protobuf.WellKnownTypes {
     #endif
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public int CalculateSize() {
       int size = 0;
       if (Value.Length != 0) {
@@ -1623,6 +1773,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(BytesValue other) {
       if (other == null) {
         return;
@@ -1634,6 +1785,7 @@ namespace Google.Protobuf.WellKnownTypes {
     }
 
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public void MergeFrom(pb::CodedInputStream input) {
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
       input.ReadRawMessage(this);
@@ -1655,6 +1807,7 @@ namespace Google.Protobuf.WellKnownTypes {
 
     #if !GOOGLE_PROTOBUF_REFSTRUCT_COMPATIBILITY_MODE
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     void pb::IBufferMessage.InternalMergeFrom(ref pb::ParseContext input) {
       uint tag;
       while ((tag = input.ReadTag()) != 0) {