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diff --git a/examples/csharp/HelloworldXamarin/iOS/ViewController.cs b/examples/csharp/HelloworldXamarin/iOS/ViewController.cs
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+++ b/examples/csharp/HelloworldXamarin/iOS/ViewController.cs
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+#region Copyright notice and license
+
+// Copyright 2018 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 System;
+using System.Threading.Tasks;
+
+using Grpc.Core;
+using Helloworld;
+
+using UIKit;
+
+namespace HelloworldXamarin.iOS
+{
+    public partial class ViewController : UIViewController
+    {
+        const int Port = 50051;
+        int count = 1;
+
+        public ViewController(IntPtr handle) : base(handle)
+        {
+        }
+
+        public override void ViewDidLoad()
+        {
+            base.ViewDidLoad();
+
+            // Perform any additional setup after loading the view, typically from a nib.
+            Button.AccessibilityIdentifier = "myButton";
+            Button.TouchUpInside += delegate
+            {
+                var title = SayHello();
+                Button.SetTitle(title, UIControlState.Normal);
+            };
+        }
+
+        public override void DidReceiveMemoryWarning()
+        {
+            base.DidReceiveMemoryWarning();
+            // Release any cached data, images, etc that aren't in use.		
+        }
+
+        private string SayHello()
+        {
+            Server server = new Server
+            {
+                Services = { Greeter.BindService(new GreeterImpl()) },
+                Ports = { new ServerPort("localhost", Port, ServerCredentials.Insecure) }
+            };
+            server.Start();
+
+            Channel channel = new Channel("localhost:50051", ChannelCredentials.Insecure);
+
+            var client = new Greeter.GreeterClient(channel);
+            string user = "Xamarin " + count;
+
+            var reply = client.SayHello(new HelloRequest { Name = user });
+
+            channel.ShutdownAsync().Wait();
+            server.ShutdownAsync().Wait();
+
+            count++;
+
+            return "Greeting: " + reply.Message;
+        }
+
+
+        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 });
+            }
+        }
+    }
+}