diff --git a/examples/csharp/HelloworldUnity/Assets/Scripts/HelloWorldScript.cs b/examples/csharp/HelloworldUnity/Assets/Scripts/HelloWorldScript.cs
index df3ce8929e1..0dad0f6a5ad 100644
--- a/examples/csharp/HelloworldUnity/Assets/Scripts/HelloWorldScript.cs
+++ b/examples/csharp/HelloworldUnity/Assets/Scripts/HelloWorldScript.cs
@@ -1,20 +1,38 @@
-using UnityEngine;
-using UnityEngine.UI;
-
-public class HelloWorldScript : MonoBehaviour {
-  int counter = 1;
-
-  // Use this for initialization
-  void Start () {}
-
-  // Update is called once per frame
-  void Update() {}
-
-  // Ran when button is clicked
-  public void RunHelloWorld(Text text)
-  {
-    var reply = HelloWorldTest.Greet("Unity " + counter);
-    text.text = "Greeting: " + reply.Message;
-    counter++;
-  }
-}
+#region Copyright notice and license
+
+// Copyright 2019 The gRPC Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#endregion
+
+using UnityEngine;
+using UnityEngine.UI;
+
+public class HelloWorldScript : MonoBehaviour {
+  int counter = 1;
+
+  // Use this for initialization
+  void Start () {}
+
+  // Update is called once per frame
+  void Update() {}
+
+  // Ran when button is clicked
+  public void RunHelloWorld(Text text)
+  {
+    var reply = HelloWorldTest.Greet("Unity " + counter);
+    text.text = "Greeting: " + reply.Message;
+    counter++;
+  }
+}
diff --git a/examples/csharp/HelloworldUnity/Assets/Scripts/HelloWorldTest.cs b/examples/csharp/HelloworldUnity/Assets/Scripts/HelloWorldTest.cs
index 7138da751b5..2c10f10a144 100644
--- a/examples/csharp/HelloworldUnity/Assets/Scripts/HelloWorldTest.cs
+++ b/examples/csharp/HelloworldUnity/Assets/Scripts/HelloWorldTest.cs
@@ -1,63 +1,81 @@
-using UnityEngine;
-using System.Threading.Tasks;
-using System;
-using Grpc.Core;
-using Helloworld;
-
-class HelloWorldTest
-{
-  // Can be run from commandline.
-  // Example command:
-  // "/Applications/Unity/Unity.app/Contents/MacOS/Unity -quit -batchmode -nographics -executeMethod HelloWorldTest.RunHelloWorld -logfile"
-  public static void RunHelloWorld()
-  {
-    Application.SetStackTraceLogType(LogType.Log, StackTraceLogType.None);
-
-    Debug.Log("==============================================================");
-    Debug.Log("Starting tests");
-    Debug.Log("==============================================================");
-
-    Debug.Log("Application.platform: " + Application.platform);
-    Debug.Log("Environment.OSVersion: " + Environment.OSVersion);
-
-    var reply = Greet("Unity");
-    Debug.Log("Greeting: " + reply.Message);
-
-    Debug.Log("==============================================================");
-    Debug.Log("Tests finished successfully.");
-    Debug.Log("==============================================================");
-  }
-
-  public static HelloReply Greet(string greeting)
-  {
-    const int Port = 50051;
-
-    Server server = new Server
-    {
-      Services = { Greeter.BindService(new GreeterImpl()) },
-      Ports = { new ServerPort("localhost", Port, ServerCredentials.Insecure) }
-    };
-    server.Start();
-
-    Channel channel = new Channel("127.0.0.1:50051", ChannelCredentials.Insecure);
-
-    var client = new Greeter.GreeterClient(channel);
-
-    var reply = client.SayHello(new HelloRequest { Name = greeting });
-
-    channel.ShutdownAsync().Wait();
-
-    server.ShutdownAsync().Wait();
-
-    return reply;
-  }
-
-  class GreeterImpl : Greeter.GreeterBase
-  {
-    // Server side handler of the SayHello RPC
-    public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)
-    {
-      return Task.FromResult(new HelloReply { Message = "Hello " + request.Name });
-    }
-  }
-}
+#region Copyright notice and license
+
+// Copyright 2019 The gRPC Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#endregion
+
+using UnityEngine;
+using System.Threading.Tasks;
+using System;
+using Grpc.Core;
+using Helloworld;
+
+class HelloWorldTest
+{
+  // Can be run from commandline.
+  // Example command:
+  // "/Applications/Unity/Unity.app/Contents/MacOS/Unity -quit -batchmode -nographics -executeMethod HelloWorldTest.RunHelloWorld -logfile"
+  public static void RunHelloWorld()
+  {
+    Application.SetStackTraceLogType(LogType.Log, StackTraceLogType.None);
+
+    Debug.Log("==============================================================");
+    Debug.Log("Starting tests");
+    Debug.Log("==============================================================");
+
+    Debug.Log("Application.platform: " + Application.platform);
+    Debug.Log("Environment.OSVersion: " + Environment.OSVersion);
+
+    var reply = Greet("Unity");
+    Debug.Log("Greeting: " + reply.Message);
+
+    Debug.Log("==============================================================");
+    Debug.Log("Tests finished successfully.");
+    Debug.Log("==============================================================");
+  }
+
+  public static HelloReply Greet(string greeting)
+  {
+    const int Port = 50051;
+
+    Server server = new Server
+    {
+      Services = { Greeter.BindService(new GreeterImpl()) },
+      Ports = { new ServerPort("localhost", Port, ServerCredentials.Insecure) }
+    };
+    server.Start();
+
+    Channel channel = new Channel("127.0.0.1:50051", ChannelCredentials.Insecure);
+
+    var client = new Greeter.GreeterClient(channel);
+
+    var reply = client.SayHello(new HelloRequest { Name = greeting });
+
+    channel.ShutdownAsync().Wait();
+
+    server.ShutdownAsync().Wait();
+
+    return reply;
+  }
+
+  class GreeterImpl : Greeter.GreeterBase
+  {
+    // Server side handler of the SayHello RPC
+    public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)
+    {
+      return Task.FromResult(new HelloReply { Message = "Hello " + request.Name });
+    }
+  }
+}