diff --git a/src/csharp/GrpcApi/MathExamples.cs b/src/csharp/GrpcApi/MathExamples.cs
index 2202c52a277..97c91b1b1b5 100644
--- a/src/csharp/GrpcApi/MathExamples.cs
+++ b/src/csharp/GrpcApi/MathExamples.cs
@@ -32,10 +32,10 @@
 #endregion
 
 using System;
-using System.Threading.Tasks;
 using System.Collections.Generic;
 using System.Reactive.Linq;
-using Google.GRPC.Core.Utils;
+using System.Threading.Tasks;
+using Grpc.Core.Utils;
 
 namespace math
 {
diff --git a/src/csharp/GrpcApi/MathGrpc.cs b/src/csharp/GrpcApi/MathGrpc.cs
index 44e704e4969..f938a245439 100644
--- a/src/csharp/GrpcApi/MathGrpc.cs
+++ b/src/csharp/GrpcApi/MathGrpc.cs
@@ -32,11 +32,11 @@
 #endregion
 
 using System;
-using System.Threading;
-using System.Threading.Tasks;
 using System.Collections.Generic;
 using System.Reactive.Linq;
-using Google.GRPC.Core;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
 
 namespace math
 {
@@ -99,31 +99,31 @@ namespace math
 
             public DivReply Div(DivArgs request, CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<DivArgs, DivReply>(divMethod, channel);
+                var call = new Grpc.Core.Call<DivArgs, DivReply>(divMethod, channel);
                 return Calls.BlockingUnaryCall(call, request, token);
             }
 
             public Task<DivReply> DivAsync(DivArgs request, CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<DivArgs, DivReply>(divMethod, channel);
+                var call = new Grpc.Core.Call<DivArgs, DivReply>(divMethod, channel);
                 return Calls.AsyncUnaryCall(call, request, token);
             }
 
             public void Fib(FibArgs request, IObserver<Num> responseObserver, CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<FibArgs, Num>(fibMethod, channel);
+                var call = new Grpc.Core.Call<FibArgs, Num>(fibMethod, channel);
                 Calls.AsyncServerStreamingCall(call, request, responseObserver, token);
             }
 
             public ClientStreamingAsyncResult<Num, Num> Sum(CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<Num, Num>(sumMethod, channel);
+                var call = new Grpc.Core.Call<Num, Num>(sumMethod, channel);
                 return Calls.AsyncClientStreamingCall(call, token);
             }
 
             public IObserver<DivArgs> DivMany(IObserver<DivReply> responseObserver, CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<DivArgs, DivReply>(divManyMethod, channel);
+                var call = new Grpc.Core.Call<DivArgs, DivReply>(divManyMethod, channel);
                 return Calls.DuplexStreamingCall(call, responseObserver, token);
             }
         }
diff --git a/src/csharp/GrpcApi/MathServiceImpl.cs b/src/csharp/GrpcApi/MathServiceImpl.cs
index 1a2f98f8b26..462fab4454f 100644
--- a/src/csharp/GrpcApi/MathServiceImpl.cs
+++ b/src/csharp/GrpcApi/MathServiceImpl.cs
@@ -32,11 +32,11 @@
 #endregion
 
 using System;
-using System.Threading;
-using System.Threading.Tasks;
 using System.Collections.Generic;
 using System.Reactive.Linq;
-using Google.GRPC.Core.Utils;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core.Utils;
 
 namespace math
 {
diff --git a/src/csharp/GrpcApi/TestServiceGrpc.cs b/src/csharp/GrpcApi/TestServiceGrpc.cs
index 64d5c095633..15700e40ac5 100644
--- a/src/csharp/GrpcApi/TestServiceGrpc.cs
+++ b/src/csharp/GrpcApi/TestServiceGrpc.cs
@@ -30,12 +30,13 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #endregion
+
 using System;
-using System.Threading;
-using System.Threading.Tasks;
 using System.Collections.Generic;
 using System.Reactive.Linq;
-using Google.GRPC.Core;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
 
 namespace grpc.testing
 {
@@ -119,49 +120,49 @@ namespace grpc.testing
 
             public Empty EmptyCall(Empty request, CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<Empty, Empty>(emptyCallMethod, channel);
+                var call = new Grpc.Core.Call<Empty, Empty>(emptyCallMethod, channel);
                 return Calls.BlockingUnaryCall(call, request, token);
             }
 
             public Task<Empty> EmptyCallAsync(Empty request, CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<Empty, Empty>(emptyCallMethod, channel);
+                var call = new Grpc.Core.Call<Empty, Empty>(emptyCallMethod, channel);
                 return Calls.AsyncUnaryCall(call, request, token);
             }
 
             public SimpleResponse UnaryCall(SimpleRequest request, CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<SimpleRequest, SimpleResponse>(unaryCallMethod, channel);
+                var call = new Grpc.Core.Call<SimpleRequest, SimpleResponse>(unaryCallMethod, channel);
                 return Calls.BlockingUnaryCall(call, request, token);
             }
 
             public Task<SimpleResponse> UnaryCallAsync(SimpleRequest request, CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<SimpleRequest, SimpleResponse>(unaryCallMethod, channel);
+                var call = new Grpc.Core.Call<SimpleRequest, SimpleResponse>(unaryCallMethod, channel);
                 return Calls.AsyncUnaryCall(call, request, token);
             }
 
             public void StreamingOutputCall(StreamingOutputCallRequest request, IObserver<StreamingOutputCallResponse> responseObserver, CancellationToken token = default(CancellationToken)) {
-                var call = new Google.GRPC.Core.Call<StreamingOutputCallRequest, StreamingOutputCallResponse>(streamingOutputCallMethod, channel);
+                var call = new Grpc.Core.Call<StreamingOutputCallRequest, StreamingOutputCallResponse>(streamingOutputCallMethod, channel);
                 Calls.AsyncServerStreamingCall(call, request, responseObserver, token);
             }
 
             public ClientStreamingAsyncResult<StreamingInputCallRequest, StreamingInputCallResponse> StreamingInputCall(CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<StreamingInputCallRequest, StreamingInputCallResponse>(streamingInputCallMethod, channel);
+                var call = new Grpc.Core.Call<StreamingInputCallRequest, StreamingInputCallResponse>(streamingInputCallMethod, channel);
                 return Calls.AsyncClientStreamingCall(call, token);
             }
 
             public IObserver<StreamingOutputCallRequest> FullDuplexCall(IObserver<StreamingOutputCallResponse> responseObserver, CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<StreamingOutputCallRequest, StreamingOutputCallResponse>(fullDuplexCallMethod, channel);
+                var call = new Grpc.Core.Call<StreamingOutputCallRequest, StreamingOutputCallResponse>(fullDuplexCallMethod, channel);
                 return Calls.DuplexStreamingCall(call, responseObserver, token);
             }
 
 
             public IObserver<StreamingOutputCallRequest> HalfDuplexCall(IObserver<StreamingOutputCallResponse> responseObserver, CancellationToken token = default(CancellationToken))
             {
-                var call = new Google.GRPC.Core.Call<StreamingOutputCallRequest, StreamingOutputCallResponse>(halfDuplexCallMethod, channel);
+                var call = new Grpc.Core.Call<StreamingOutputCallRequest, StreamingOutputCallResponse>(halfDuplexCallMethod, channel);
                 return Calls.DuplexStreamingCall(call, responseObserver, token);
             }
         }
diff --git a/src/csharp/GrpcApiTests/MathClientServerTests.cs b/src/csharp/GrpcApiTests/MathClientServerTests.cs
index 9056142097b..767340d6f2b 100644
--- a/src/csharp/GrpcApiTests/MathClientServerTests.cs
+++ b/src/csharp/GrpcApiTests/MathClientServerTests.cs
@@ -32,12 +32,12 @@
 #endregion
 
 using System;
-using NUnit.Framework;
-using Google.GRPC.Core;
+using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
-using Google.GRPC.Core.Utils;
-using System.Collections.Generic;
+using Grpc.Core;
+using Grpc.Core.Utils;
+using NUnit.Framework;
 
 namespace math.Tests
 {
diff --git a/src/csharp/GrpcCore/Call.cs b/src/csharp/GrpcCore/Call.cs
index 93a7507b2fa..72dca688952 100644
--- a/src/csharp/GrpcCore/Call.cs
+++ b/src/csharp/GrpcCore/Call.cs
@@ -32,9 +32,9 @@
 #endregion
 
 using System;
-using Google.GRPC.Core.Internal;
+using Grpc.Core.Internal;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     public class Call<TRequest, TResponse>
     {
diff --git a/src/csharp/GrpcCore/Calls.cs b/src/csharp/GrpcCore/Calls.cs
index e5ddd879d68..b67332676ac 100644
--- a/src/csharp/GrpcCore/Calls.cs
+++ b/src/csharp/GrpcCore/Calls.cs
@@ -34,9 +34,9 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Google.GRPC.Core.Internal;
+using Grpc.Core.Internal;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     // NOTE: this class is work-in-progress
 
diff --git a/src/csharp/GrpcCore/Channel.cs b/src/csharp/GrpcCore/Channel.cs
index d1f795541cc..942651cf393 100644
--- a/src/csharp/GrpcCore/Channel.cs
+++ b/src/csharp/GrpcCore/Channel.cs
@@ -35,9 +35,9 @@ using System;
 using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
-using Google.GRPC.Core.Internal;
+using Grpc.Core.Internal;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
 	public class Channel : IDisposable
 	{
diff --git a/src/csharp/GrpcCore/ClientStreamingAsyncResult.cs b/src/csharp/GrpcCore/ClientStreamingAsyncResult.cs
index f82fe5f26ce..44580a11542 100644
--- a/src/csharp/GrpcCore/ClientStreamingAsyncResult.cs
+++ b/src/csharp/GrpcCore/ClientStreamingAsyncResult.cs
@@ -34,7 +34,7 @@
 using System;
 using System.Threading.Tasks;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     /// <summary>
     /// Return type for client streaming async method.
diff --git a/src/csharp/GrpcCore/GrpcEnvironment.cs b/src/csharp/GrpcCore/GrpcEnvironment.cs
index 55a6cac8f69..0e3a0a581cd 100644
--- a/src/csharp/GrpcCore/GrpcEnvironment.cs
+++ b/src/csharp/GrpcCore/GrpcEnvironment.cs
@@ -32,10 +32,10 @@
 #endregion
 
 using System;
-using Google.GRPC.Core.Internal;
 using System.Runtime.InteropServices;
+using Grpc.Core.Internal;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     /// <summary>
     /// Encapsulates initialization and shutdown of gRPC library.
diff --git a/src/csharp/GrpcCore/Internal/AsyncCall.cs b/src/csharp/GrpcCore/Internal/AsyncCall.cs
index ce0ba30d53d..5e96092e270 100644
--- a/src/csharp/GrpcCore/Internal/AsyncCall.cs
+++ b/src/csharp/GrpcCore/Internal/AsyncCall.cs
@@ -32,14 +32,14 @@
 #endregion
 
 using System;
-using System.Runtime.InteropServices;
 using System.Diagnostics;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
-using System.Runtime.CompilerServices;
-using Google.GRPC.Core.Internal;
+using Grpc.Core.Internal;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     /// <summary>
     /// Handles native call lifecycle and provides convenience methods.
@@ -381,7 +381,7 @@ namespace Google.GRPC.Core.Internal
 
         private void CompleteStreamObserver(Status status)
         {
-            if (status.StatusCode != StatusCode.GRPC_STATUS_OK)
+            if (status.StatusCode != StatusCode.OK)
             {
                 // TODO: wrap to handle exceptions;
                 readObserver.OnError(new RpcException(status));
@@ -413,13 +413,13 @@ namespace Google.GRPC.Core.Internal
                 if (error != GRPCOpError.GRPC_OP_OK)
                 {
                     tcs.SetException(new RpcException(
-                        new Status(StatusCode.GRPC_STATUS_INTERNAL, "Internal error occured.")
+                        new Status(StatusCode.Internal, "Internal error occured.")
                     ));
                     return;
                 }
 
                 var status = ctx.GetReceivedStatus();
-                if (status.StatusCode != StatusCode.GRPC_STATUS_OK)
+                if (status.StatusCode != StatusCode.OK)
                 {
                     tcs.SetException(new RpcException(status));
                     return;
diff --git a/src/csharp/GrpcCore/Internal/BatchContextSafeHandleNotOwned.cs b/src/csharp/GrpcCore/Internal/BatchContextSafeHandleNotOwned.cs
index ddfd94a3b56..75cd30e1a2d 100644
--- a/src/csharp/GrpcCore/Internal/BatchContextSafeHandleNotOwned.cs
+++ b/src/csharp/GrpcCore/Internal/BatchContextSafeHandleNotOwned.cs
@@ -33,9 +33,9 @@
 
 using System;
 using System.Runtime.InteropServices;
-using Google.GRPC.Core;
+using Grpc.Core;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     /// <summary>
     /// Not owned version of 
diff --git a/src/csharp/GrpcCore/Internal/CallSafeHandle.cs b/src/csharp/GrpcCore/Internal/CallSafeHandle.cs
index 55d66a62ca7..659a383b4bd 100644
--- a/src/csharp/GrpcCore/Internal/CallSafeHandle.cs
+++ b/src/csharp/GrpcCore/Internal/CallSafeHandle.cs
@@ -32,11 +32,11 @@
 #endregion
 
 using System;
-using System.Runtime.InteropServices;
 using System.Diagnostics;
-using Google.GRPC.Core;
+using System.Runtime.InteropServices;
+using Grpc.Core;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     //TODO: rename the delegate
     internal delegate void CompletionCallbackDelegate(GRPCOpError error, IntPtr batchContextPtr);
diff --git a/src/csharp/GrpcCore/Internal/ChannelSafeHandle.cs b/src/csharp/GrpcCore/Internal/ChannelSafeHandle.cs
index 379c83d5375..f15ead35724 100644
--- a/src/csharp/GrpcCore/Internal/ChannelSafeHandle.cs
+++ b/src/csharp/GrpcCore/Internal/ChannelSafeHandle.cs
@@ -36,7 +36,7 @@ using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     /// <summary>
     /// grpc_channel from <grpc/grpc.h>
diff --git a/src/csharp/GrpcCore/Internal/ClientStreamingInputObserver.cs b/src/csharp/GrpcCore/Internal/ClientStreamingInputObserver.cs
index 4d10a9bdf96..fb59e86e2d7 100644
--- a/src/csharp/GrpcCore/Internal/ClientStreamingInputObserver.cs
+++ b/src/csharp/GrpcCore/Internal/ClientStreamingInputObserver.cs
@@ -32,9 +32,9 @@
 #endregion
 
 using System;
-using Google.GRPC.Core.Internal;
+using Grpc.Core.Internal;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     internal class ClientStreamingInputObserver<TWrite, TRead> : IObserver<TWrite>
 	{
diff --git a/src/csharp/GrpcCore/Internal/CompletionQueueSafeHandle.cs b/src/csharp/GrpcCore/Internal/CompletionQueueSafeHandle.cs
index 5ea436df197..3f01fdbfd05 100644
--- a/src/csharp/GrpcCore/Internal/CompletionQueueSafeHandle.cs
+++ b/src/csharp/GrpcCore/Internal/CompletionQueueSafeHandle.cs
@@ -35,7 +35,7 @@ using System;
 using System.Runtime.InteropServices;
 using System.Threading.Tasks;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     /// <summary>
     /// grpc_completion_queue from <grpc/grpc.h>
diff --git a/src/csharp/GrpcCore/Internal/Enums.cs b/src/csharp/GrpcCore/Internal/Enums.cs
index d38896ec843..f363050b07e 100644
--- a/src/csharp/GrpcCore/Internal/Enums.cs
+++ b/src/csharp/GrpcCore/Internal/Enums.cs
@@ -34,7 +34,7 @@
 using System;
 using System.Runtime.InteropServices;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     /// <summary>
     /// from grpc/grpc.h
diff --git a/src/csharp/GrpcCore/Internal/GrpcThreadPool.cs b/src/csharp/GrpcCore/Internal/GrpcThreadPool.cs
index 634a0b2d721..9e69fe2f430 100644
--- a/src/csharp/GrpcCore/Internal/GrpcThreadPool.cs
+++ b/src/csharp/GrpcCore/Internal/GrpcThreadPool.cs
@@ -32,13 +32,13 @@
 #endregion
 
 using System;
-using Google.GRPC.Core.Internal;
+using System.Collections.Generic;
 using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
-using System.Collections.Generic;
+using Grpc.Core.Internal;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     /// <summary>
     /// Pool of threads polling on the same completion queue.
diff --git a/src/csharp/GrpcCore/Internal/SafeHandleZeroIsInvalid.cs b/src/csharp/GrpcCore/Internal/SafeHandleZeroIsInvalid.cs
index 59f08d4ca89..aa6fce2e969 100644
--- a/src/csharp/GrpcCore/Internal/SafeHandleZeroIsInvalid.cs
+++ b/src/csharp/GrpcCore/Internal/SafeHandleZeroIsInvalid.cs
@@ -34,7 +34,7 @@
 using System;
 using System.Runtime.InteropServices;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     /// <summary>
     /// Safe handle to wrap native objects.
diff --git a/src/csharp/GrpcCore/Internal/ServerSafeHandle.cs b/src/csharp/GrpcCore/Internal/ServerSafeHandle.cs
index 047bde1addf..de9bbaf7c12 100644
--- a/src/csharp/GrpcCore/Internal/ServerSafeHandle.cs
+++ b/src/csharp/GrpcCore/Internal/ServerSafeHandle.cs
@@ -32,11 +32,11 @@
 #endregion
 
 using System;
-using System.Runtime.InteropServices;
-using System.Diagnostics;
 using System.Collections.Concurrent;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     // TODO: we need to make sure that the delegates are not collected before invoked.
     internal delegate void ServerShutdownCallbackDelegate(IntPtr eventPtr);
diff --git a/src/csharp/GrpcCore/Internal/ServerStreamingOutputObserver.cs b/src/csharp/GrpcCore/Internal/ServerStreamingOutputObserver.cs
index e9cb65cb3b0..08d99214754 100644
--- a/src/csharp/GrpcCore/Internal/ServerStreamingOutputObserver.cs
+++ b/src/csharp/GrpcCore/Internal/ServerStreamingOutputObserver.cs
@@ -32,9 +32,9 @@
 #endregion
 
 using System;
-using Google.GRPC.Core.Internal;
+using Grpc.Core.Internal;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
     /// <summary>
     /// Observer that writes all arriving messages to a call abstraction (in blocking fashion)
@@ -52,7 +52,7 @@ namespace Google.GRPC.Core.Internal
 		public void OnCompleted()
 		{
             // TODO: how bad is the Wait here?
-            call.SendStatusFromServerAsync(new Status(StatusCode.GRPC_STATUS_OK, "")).Wait();
+            call.SendStatusFromServerAsync(new Status(StatusCode.OK, "")).Wait();
 		}
 
 		public void OnError(Exception error)
diff --git a/src/csharp/GrpcCore/Internal/Timespec.cs b/src/csharp/GrpcCore/Internal/Timespec.cs
index 38b75180dc5..b191ecde94c 100644
--- a/src/csharp/GrpcCore/Internal/Timespec.cs
+++ b/src/csharp/GrpcCore/Internal/Timespec.cs
@@ -35,7 +35,7 @@ using System;
 using System.Runtime.InteropServices;
 using System.Threading;
 
-namespace Google.GRPC.Core.Internal
+namespace Grpc.Core.Internal
 {
 	/// <summary>
 	/// gpr_timespec from grpc/support/time.h
diff --git a/src/csharp/GrpcCore/Marshaller.cs b/src/csharp/GrpcCore/Marshaller.cs
index f031354fd2d..602e0eb8240 100644
--- a/src/csharp/GrpcCore/Marshaller.cs
+++ b/src/csharp/GrpcCore/Marshaller.cs
@@ -33,7 +33,7 @@
 
 using System;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     /// <summary>
     /// For serializing and deserializing messages.
diff --git a/src/csharp/GrpcCore/Method.cs b/src/csharp/GrpcCore/Method.cs
index 64a4f71396d..c94aa8161fe 100644
--- a/src/csharp/GrpcCore/Method.cs
+++ b/src/csharp/GrpcCore/Method.cs
@@ -33,7 +33,7 @@
 
 using System;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     public enum MethodType
     {
diff --git a/src/csharp/GrpcCore/RpcException.cs b/src/csharp/GrpcCore/RpcException.cs
index 9ec1d2f2f33..5a9d0039bc9 100644
--- a/src/csharp/GrpcCore/RpcException.cs
+++ b/src/csharp/GrpcCore/RpcException.cs
@@ -33,7 +33,7 @@
 
 using System;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     public class RpcException : Exception
     {
diff --git a/src/csharp/GrpcCore/Server.cs b/src/csharp/GrpcCore/Server.cs
index 91842d81821..002592a3d88 100644
--- a/src/csharp/GrpcCore/Server.cs
+++ b/src/csharp/GrpcCore/Server.cs
@@ -32,14 +32,14 @@
 #endregion
 
 using System;
-using System.Runtime.InteropServices;
-using System.Diagnostics;
-using System.Threading.Tasks;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
-using Google.GRPC.Core.Internal;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Threading.Tasks;
+using Grpc.Core.Internal;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     /// <summary>
     /// Server is implemented only to be able to do
diff --git a/src/csharp/GrpcCore/ServerCallHandler.cs b/src/csharp/GrpcCore/ServerCallHandler.cs
index 48d1eaa3359..1296947f34d 100644
--- a/src/csharp/GrpcCore/ServerCallHandler.cs
+++ b/src/csharp/GrpcCore/ServerCallHandler.cs
@@ -32,9 +32,9 @@
 #endregion
 
 using System;
-using Google.GRPC.Core.Internal;
+using Grpc.Core.Internal;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     internal interface IServerCallHandler
     {
@@ -111,7 +111,7 @@ namespace Google.GRPC.Core
 
             var finishedTask = asyncCall.ServerSideStreamingRequestCallAsync(new NullObserver<byte[]>());
 
-            asyncCall.SendStatusFromServerAsync(new Status(StatusCode.GRPC_STATUS_UNIMPLEMENTED, "No such method.")).Wait();
+            asyncCall.SendStatusFromServerAsync(new Status(StatusCode.Unimplemented, "No such method.")).Wait();
 
             finishedTask.Wait();
         }
diff --git a/src/csharp/GrpcCore/ServerCalls.cs b/src/csharp/GrpcCore/ServerCalls.cs
index 273029cab60..bed77796de1 100644
--- a/src/csharp/GrpcCore/ServerCalls.cs
+++ b/src/csharp/GrpcCore/ServerCalls.cs
@@ -33,7 +33,7 @@
 
 using System;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     // TODO: perhaps add also serverSideStreaming and clientSideStreaming
 
diff --git a/src/csharp/GrpcCore/ServerServiceDefinition.cs b/src/csharp/GrpcCore/ServerServiceDefinition.cs
index 1eb17837e44..231c3760620 100644
--- a/src/csharp/GrpcCore/ServerServiceDefinition.cs
+++ b/src/csharp/GrpcCore/ServerServiceDefinition.cs
@@ -34,7 +34,7 @@
 using System;
 using System.Collections.Generic;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     public class ServerServiceDefinition
     {
diff --git a/src/csharp/GrpcCore/Status.cs b/src/csharp/GrpcCore/Status.cs
index 6430e6b7ab7..5ea1df7b481 100644
--- a/src/csharp/GrpcCore/Status.cs
+++ b/src/csharp/GrpcCore/Status.cs
@@ -34,7 +34,7 @@
 using System;
 using System.Runtime.InteropServices;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
 	/// <summary>
 	/// Represents RPC result.
diff --git a/src/csharp/GrpcCore/StatusCode.cs b/src/csharp/GrpcCore/StatusCode.cs
index ba99f9b5e0b..1fbf9c1b687 100644
--- a/src/csharp/GrpcCore/StatusCode.cs
+++ b/src/csharp/GrpcCore/StatusCode.cs
@@ -33,22 +33,22 @@
 
 using System;
 
-namespace Google.GRPC.Core
+namespace Grpc.Core
 {
     // TODO: element names should changed to comply with C# naming conventions.
     /// <summary>
-    /// grpc_status_code from grpc/status.h
+    /// based on grpc_status_code from grpc/status.h
     /// </summary>
     public enum StatusCode
     {
         /* Not an error; returned on success
 
      HTTP Mapping: 200 OK */
-        GRPC_STATUS_OK = 0,
+        OK = 0,
         /* The operation was cancelled (typically by the caller).
 
      HTTP Mapping: 499 Client Closed Request */
-        GRPC_STATUS_CANCELLED = 1,
+        Cancelled = 1,
         /* Unknown error.  An example of where this error may be returned is
      if a Status value received from another address space belongs to
      an error-space that is not known in this address space.  Also
@@ -56,14 +56,14 @@ namespace Google.GRPC.Core
      may be converted to this error.
 
      HTTP Mapping: 500 Internal Server Error */
-        GRPC_STATUS_UNKNOWN = 2,
+        Unknown = 2,
         /* Client specified an invalid argument.  Note that this differs
      from FAILED_PRECONDITION.  INVALID_ARGUMENT indicates arguments
      that are problematic regardless of the state of the system
      (e.g., a malformed file name).
 
      HTTP Mapping: 400 Bad Request */
-        GRPC_STATUS_INVALID_ARGUMENT = 3,
+        InvalidArgument = 3,
         /* Deadline expired before operation could complete.  For operations
      that change the state of the system, this error may be returned
      even if the operation has completed successfully.  For example, a
@@ -71,16 +71,16 @@ namespace Google.GRPC.Core
      enough for the deadline to expire.
 
      HTTP Mapping: 504 Gateway Timeout */
-        GRPC_STATUS_DEADLINE_EXCEEDED = 4,
+        DeadlineExceeded = 4,
         /* Some requested entity (e.g., file or directory) was not found.
 
      HTTP Mapping: 404 Not Found */
-        GRPC_STATUS_NOT_FOUND = 5,
+        NotFound = 5,
         /* Some entity that we attempted to create (e.g., file or directory)
      already exists.
 
      HTTP Mapping: 409 Conflict */
-        GRPC_STATUS_ALREADY_EXISTS = 6,
+        AlreadyExists = 6,
         /* The caller does not have permission to execute the specified
      operation.  PERMISSION_DENIED must not be used for rejections
      caused by exhausting some resource (use RESOURCE_EXHAUSTED
@@ -89,17 +89,17 @@ namespace Google.GRPC.Core
      instead for those errors).
 
      HTTP Mapping: 403 Forbidden */
-        GRPC_STATUS_PERMISSION_DENIED = 7,
+        PermissionDenied = 7,
         /* The request does not have valid authentication credentials for the
      operation.
 
      HTTP Mapping: 401 Unauthorized */
-        GRPC_STATUS_UNAUTHENTICATED = 16,
+        Unauthenticated = 16,
         /* Some resource has been exhausted, perhaps a per-user quota, or
      perhaps the entire file system is out of space.
 
      HTTP Mapping: 429 Too Many Requests */
-        GRPC_STATUS_RESOURCE_EXHAUSTED = 8,
+        ResourceExhausted = 8,
         /* Operation was rejected because the system is not in a state
      required for the operation's execution.  For example, directory
      to be deleted may be non-empty, an rmdir operation is applied to
@@ -126,7 +126,7 @@ namespace Google.GRPC.Core
      the request contains Etag related headers. So if the server does see
      Etag related headers in the request, it may choose to return 412
      instead of 400 for this error code. */
-        GRPC_STATUS_FAILED_PRECONDITION = 9,
+        FailedPrecondition = 9,
         /* The operation was aborted, typically due to a concurrency issue
      like sequencer check failures, transaction aborts, etc.
 
@@ -134,7 +134,7 @@ namespace Google.GRPC.Core
      ABORTED, and UNAVAILABLE.
 
      HTTP Mapping: 409 Conflict */
-        GRPC_STATUS_ABORTED = 10,
+        Aborted = 10,
         /* Operation was attempted past the valid range.  E.g., seeking or
      reading past end of file.
 
@@ -152,17 +152,17 @@ namespace Google.GRPC.Core
      they are done.
 
      HTTP Mapping: 400 Bad Request */
-        GRPC_STATUS_OUT_OF_RANGE = 11,
+        OutOfRange = 11,
         /* Operation is not implemented or not supported/enabled in this service.
 
      HTTP Mapping: 501 Not Implemented */
-        GRPC_STATUS_UNIMPLEMENTED = 12,
+        Unimplemented = 12,
         /* Internal errors.  Means some invariants expected by underlying
      system has been broken.  If you see one of these errors,
      something is very broken.
 
      HTTP Mapping: 500 Internal Server Error */
-        GRPC_STATUS_INTERNAL = 13,
+        Internal = 13,
         /* The service is currently unavailable.  This is a most likely a
      transient condition and may be corrected by retrying with
      a backoff.
@@ -171,13 +171,11 @@ namespace Google.GRPC.Core
      ABORTED, and UNAVAILABLE.
 
      HTTP Mapping: 503 Service Unavailable */
-        GRPC_STATUS_UNAVAILABLE = 14,
+        Unavailable = 14,
         /* Unrecoverable data loss or corruption.
 
      HTTP Mapping: 500 Internal Server Error */
-        GRPC_STATUS_DATA_LOSS = 15,
-        /* Force users to include a default branch: */
-        GRPC_STATUS__DO_NOT_USE = -1
+        DataLoss = 15
     }
 }
 
diff --git a/src/csharp/GrpcCore/Utils/RecordingObserver.cs b/src/csharp/GrpcCore/Utils/RecordingObserver.cs
index 0c784e1d356..99d2725b70e 100644
--- a/src/csharp/GrpcCore/Utils/RecordingObserver.cs
+++ b/src/csharp/GrpcCore/Utils/RecordingObserver.cs
@@ -32,10 +32,10 @@
 #endregion
 
 using System;
-using System.Threading.Tasks;
 using System.Collections.Generic;
+using System.Threading.Tasks;
 
-namespace Google.GRPC.Core.Utils
+namespace Grpc.Core.Utils
 {
     public class RecordingObserver<T> : IObserver<T>
     {
diff --git a/src/csharp/GrpcCore/Utils/RecordingQueue.cs b/src/csharp/GrpcCore/Utils/RecordingQueue.cs
index f8940d7584c..63992da6a95 100644
--- a/src/csharp/GrpcCore/Utils/RecordingQueue.cs
+++ b/src/csharp/GrpcCore/Utils/RecordingQueue.cs
@@ -36,7 +36,7 @@ using System.Threading.Tasks;
 using System.Collections.Generic;
 using System.Collections.Concurrent;
 
-namespace Google.GRPC.Core.Utils
+namespace Grpc.Core.Utils
 {
     // TODO: replace this by something that implements IAsyncEnumerator.
     /// <summary>
diff --git a/src/csharp/GrpcCoreTests/ClientServerTest.cs b/src/csharp/GrpcCoreTests/ClientServerTest.cs
index ba43e4f6a07..7e564a2fba5 100644
--- a/src/csharp/GrpcCoreTests/ClientServerTest.cs
+++ b/src/csharp/GrpcCoreTests/ClientServerTest.cs
@@ -32,15 +32,15 @@
 #endregion
 
 using System;
-using NUnit.Framework;
-using Google.GRPC.Core;
-using Google.GRPC.Core.Internal;
-using System.Threading;
 using System.Diagnostics;
+using System.Threading;
 using System.Threading.Tasks;
-using Google.GRPC.Core.Utils;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+using NUnit.Framework;
 
-namespace Google.GRPC.Core.Tests
+namespace Grpc.Core.Tests
 {
     public class ClientServerTest
     {
@@ -133,7 +133,7 @@ namespace Google.GRPC.Core.Tests
                     Calls.BlockingUnaryCall(call, "ABC", default(CancellationToken));
                     Assert.Fail();
                 } catch(RpcException e) {
-                    Assert.AreEqual(StatusCode.GRPC_STATUS_UNIMPLEMENTED, e.Status.StatusCode);
+                    Assert.AreEqual(StatusCode.Unimplemented, e.Status.StatusCode);
                 }
             }
 
diff --git a/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs b/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs
index 8656b1bf016..8d3aef946a6 100644
--- a/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs
+++ b/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs
@@ -32,11 +32,11 @@
 #endregion
 
 using System;
-using NUnit.Framework;
-using Google.GRPC.Core;
 using System.Threading;
+using Grpc.Core;
+using NUnit.Framework;
 
-namespace Google.GRPC.Core.Tests
+namespace Grpc.Core.Tests
 {
     public class GrpcEnvironmentTest
     {
diff --git a/src/csharp/GrpcCoreTests/ServerTest.cs b/src/csharp/GrpcCoreTests/ServerTest.cs
index 43414a4cc49..dd30366f6a1 100644
--- a/src/csharp/GrpcCoreTests/ServerTest.cs
+++ b/src/csharp/GrpcCoreTests/ServerTest.cs
@@ -32,12 +32,12 @@
 #endregion
 
 using System;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
 using NUnit.Framework;
-using Google.GRPC.Core.Internal;
-using Google.GRPC.Core;
-using Google.GRPC.Core.Utils;
 
-namespace Google.GRPC.Core.Tests
+namespace Grpc.Core.Tests
 {
     public class ServerTest
     {
@@ -47,7 +47,7 @@ namespace Google.GRPC.Core.Tests
             GrpcEnvironment.Initialize();
 
             Server server = new Server();
-            int port = server.AddPort("localhost:0");
+            server.AddPort("localhost:0");
             server.Start();
             server.ShutdownAsync().Wait();
 
diff --git a/src/csharp/GrpcCoreTests/TestResult.xml b/src/csharp/GrpcCoreTests/TestResult.xml
index a5a6abd7b95..13da80739ce 100644
--- a/src/csharp/GrpcCoreTests/TestResult.xml
+++ b/src/csharp/GrpcCoreTests/TestResult.xml
@@ -15,17 +15,17 @@
                     <results>
                       <test-suite type="TestFixture" name="CallsTest" executed="True" result="Success" success="True" time="0.009" asserts="0">
                         <results>
-                          <test-case name="Google.GRPC.Core.Tests.CallsTest.Test1" executed="True" result="Success" success="True" time="0.004" asserts="0" />
+                          <test-case name="Grpc.Core.Tests.CallsTest.Test1" executed="True" result="Success" success="True" time="0.004" asserts="0" />
                         </results>
                       </test-suite>
                       <test-suite type="TestFixture" name="ClientServerTest" executed="True" result="Success" success="True" time="0.149" asserts="0">
                         <results>
-                          <test-case name="Google.GRPC.Core.Tests.ClientServerTest.EmptyCall" executed="True" result="Success" success="True" time="0.111" asserts="0" />
+                          <test-case name="Grpc.Core.Tests.ClientServerTest.EmptyCall" executed="True" result="Success" success="True" time="0.111" asserts="0" />
                         </results>
                       </test-suite>
                       <test-suite type="TestFixture" name="ServerTest" executed="True" result="Success" success="True" time="0.001" asserts="0">
                         <results>
-                          <test-case name="Google.GRPC.Core.Tests.ServerTest.StartAndShutdownServer" executed="True" result="Success" success="True" time="0.001" asserts="0" />
+                          <test-case name="Grpc.Core.Tests.ServerTest.StartAndShutdownServer" executed="True" result="Success" success="True" time="0.001" asserts="0" />
                         </results>
                       </test-suite>
                     </results>
diff --git a/src/csharp/GrpcCoreTests/TimespecTest.cs b/src/csharp/GrpcCoreTests/TimespecTest.cs
index 21698242191..0ca84ec44bf 100644
--- a/src/csharp/GrpcCoreTests/TimespecTest.cs
+++ b/src/csharp/GrpcCoreTests/TimespecTest.cs
@@ -32,11 +32,11 @@
 #endregion
 
 using System;
-using NUnit.Framework;
 using System.Runtime.InteropServices;
-using Google.GRPC.Core.Internal;
+using Grpc.Core.Internal;
+using NUnit.Framework;
 
-namespace Google.GRPC.Core.Internal.Tests
+namespace Grpc.Core.Internal.Tests
 {
     public class TimespecTest
     {
diff --git a/src/csharp/InteropClient/Client.cs b/src/csharp/InteropClient/Client.cs
index 945afe0642f..fdec6efd2ef 100644
--- a/src/csharp/InteropClient/Client.cs
+++ b/src/csharp/InteropClient/Client.cs
@@ -33,14 +33,14 @@
 
 using System;
 using System.Collections.Generic;
-using NUnit.Framework;
 using System.Text.RegularExpressions;
-using Google.GRPC.Core;
-using Google.GRPC.Core.Utils;
 using Google.ProtocolBuffers;
+using Grpc.Core;
+using Grpc.Core.Utils;
+using NUnit.Framework;
 using grpc.testing;
 
-namespace Google.GRPC.Interop
+namespace Grpc.Interop
 {
     class Client
     {
diff --git a/src/csharp/InteropClient/InteropClient.csproj b/src/csharp/InteropClient/InteropClient.csproj
index a450f3a2feb..29590f49508 100644
--- a/src/csharp/InteropClient/InteropClient.csproj
+++ b/src/csharp/InteropClient/InteropClient.csproj
@@ -9,7 +9,7 @@
     <OutputType>Exe</OutputType>
     <RootNamespace>InteropClient</RootNamespace>
     <AssemblyName>InteropClient</AssemblyName>
-    <StartupObject>Google.GRPC.Interop.Client</StartupObject>
+    <StartupObject>Grpc.Interop.Client</StartupObject>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
@@ -33,14 +33,13 @@
     <PlatformTarget>x86</PlatformTarget>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Google.ProtocolBuffers, Version=2.4.1.521, Culture=neutral, PublicKeyToken=55f7125234beb589, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.ProtocolBuffers.2.4.1.521\lib\net40\Google.ProtocolBuffers.dll</HintPath>
-    </Reference>
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.2.6.4\lib\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System" />
+    <Reference Include="Google.ProtocolBuffers">
+      <HintPath>..\packages\Google.ProtocolBuffers.2.4.1.521\lib\net40\Google.ProtocolBuffers.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs" />
diff --git a/src/csharp/MathClient/MathClient.cs b/src/csharp/MathClient/MathClient.cs
index eb9b7b105b8..95a4678bb8f 100644
--- a/src/csharp/MathClient/MathClient.cs
+++ b/src/csharp/MathClient/MathClient.cs
@@ -33,8 +33,8 @@
 
 using System;
 using System.Runtime.InteropServices;
-using Google.GRPC.Core;
 using System.Threading;
+using Grpc.Core;
 
 namespace math
 {