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diff --git a/src/csharp/Grpc.Core/ServerPort.cs b/src/csharp/Grpc.Core/ServerPort.cs
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+++ b/src/csharp/Grpc.Core/ServerPort.cs
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+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+
+using Grpc.Core.Utils;
+
+namespace Grpc.Core
+{
+    /// <summary>
+    /// A port exposed by a server.
+    /// </summary>
+    public class ServerPort
+    {
+        /// <summary>
+        /// Pass this value as port to have the server choose an unused listening port for you.
+        /// Ports added to a server will contain the bound port in their <see cref="BoundPort"/> property.
+        /// </summary>
+        public const int PickUnused = 0;
+
+        readonly string host;
+        readonly int port;
+        readonly ServerCredentials credentials;
+        readonly int boundPort;
+
+        /// <summary>
+        /// Creates a new port on which server should listen.
+        /// </summary>
+        /// <returns>The port on which server will be listening.</returns>
+        /// <param name="host">the host</param>
+        /// <param name="port">the port. If zero, an unused port is chosen automatically.</param>
+        /// <param name="credentials">credentials to use to secure this port.</param>
+        public ServerPort(string host, int port, ServerCredentials credentials)
+        {
+            this.host = Preconditions.CheckNotNull(host);
+            this.port = port;
+            this.credentials = Preconditions.CheckNotNull(credentials);
+        }
+
+        /// <summary>
+        /// Creates a port from an existing <c>ServerPort</c> instance and boundPort value.
+        /// </summary>
+        internal ServerPort(ServerPort serverPort, int boundPort)
+        {
+            this.host = serverPort.host;
+            this.port = serverPort.port;
+            this.credentials = serverPort.credentials;
+            this.boundPort = boundPort;
+        }
+
+        /// <value>The host.</value>
+        public string Host
+        {
+            get
+            {
+                return host;
+            }
+        }
+
+        /// <value>The port.</value>
+        public int Port
+        {
+            get
+            {
+                return port;
+            }
+        }
+
+        /// <value>The server credentials.</value>
+        public ServerCredentials Credentials
+        {
+            get
+            {
+                return credentials;
+            }
+        }
+
+        /// <value>
+        /// The port actually bound by the server. This is useful if you let server
+        /// pick port automatically. <see cref="PickUnused"/>
+        /// </value>
+        public int BoundPort
+        {
+            get
+            {
+                return boundPort;
+            }
+        }
+    }
+}