Deprecate ATL based IPC wrapper library (#2248)

* Deprecate ATL based IPC wrapper library

* C# projects now use named pipe server implementations from two_way_pipe_message
through the interop C++/Cli library.

* Added Unit testing to interop library

src/common/interop-tests/UnitTest1.cs

@@ -0,0 +1,55 @@
+using System;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.IO.Pipes;
+using interop;
+using System.IO;
+using System.Threading;
+using System.Text;
+
+namespace interop_tests
+{
+    [TestClass]
+    public class UnitTest1
+    {
+        private string SERVER_SIDE = "\\\\.\\pipe\\serverside";
+        private string CLIENT_SIDE = "\\\\.\\pipe\\clientside";
+
+        private TwoWayPipeMessageIPCManaged clientPipe;
+
+        [TestInitialize]
+        public void Initialize()
+        {
+            clientPipe = new TwoWayPipeMessageIPCManaged(CLIENT_SIDE, SERVER_SIDE, null);
+        }
+
+        [TestCleanup]
+        public void Cleanup()
+        {
+            clientPipe.End();
+        }
+
+        [TestMethod]
+        public void TestSend()
+        {
+            var testString = "This string is a test\n";
+            var reset = new AutoResetEvent(false);
+
+            var serverPipe = new TwoWayPipeMessageIPCManaged(
+                SERVER_SIDE,
+                CLIENT_SIDE,
+                (string msg) =>
+                {
+                    Assert.AreEqual(testString, msg);
+                    reset.Set();
+                });
+            serverPipe.Start();
+            clientPipe.Start();
+
+            clientPipe.Send(testString);
+            reset.WaitOne();
+
+            serverPipe.End();
+        }
+
+    }
+}