Add Stop methods for C# servers.


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665538 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/csharp/src/Server/TServer.cs b/lib/csharp/src/Server/TServer.cs
index b168d99..a9b2816 100644
--- a/lib/csharp/src/Server/TServer.cs
+++ b/lib/csharp/src/Server/TServer.cs
@@ -103,6 +103,8 @@
 		 * The run method fires up the server and gets things going.
 		 */
 		public abstract void Serve();
+
+		public abstract void Stop();
 	}
 }