Revert "THRIFT-4982 Remove deprecated C# bindings from the code base"

Only compiler, test, lib and tutorial code.
diff --git a/lib/csharp/src/Protocol/TMessage.cs b/lib/csharp/src/Protocol/TMessage.cs
new file mode 100644
index 0000000..348263c
--- /dev/null
+++ b/lib/csharp/src/Protocol/TMessage.cs
@@ -0,0 +1,62 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ *
+ * Contains some contributions under the Thrift Software License.
+ * Please see doc/old-thrift-license.txt in the Thrift distribution for
+ * details.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Thrift.Protocol
+{
+    public struct TMessage
+    {
+        private string name;
+        private TMessageType type;
+        private int seqID;
+
+        public TMessage(string name, TMessageType type, int seqid)
+            :this()
+        {
+            this.name = name;
+            this.type = type;
+            this.seqID = seqid;
+        }
+
+        public string Name
+        {
+            get { return name; }
+            set { name = value; }
+        }
+
+        public TMessageType Type
+        {
+            get { return type; }
+            set { type = value; }
+        }
+
+        public int SeqID
+        {
+            get { return seqID; }
+            set { seqID = value; }
+        }
+    }
+}