diff --git a/lib/csharp/src/TApplicationException.cs b/lib/csharp/src/TApplicationException.cs
new file mode 100644
index 0000000..8dd7ae5
--- /dev/null
+++ b/lib/csharp/src/TApplicationException.cs
@@ -0,0 +1,146 @@
+/**
+ * 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 Thrift.Protocol;
+
+namespace Thrift
+{
+    public class TApplicationException : TException
+    {
+        protected ExceptionType type;
+
+        public TApplicationException()
+        {
+        }
+
+        public TApplicationException(ExceptionType type)
+        {
+            this.type = type;
+        }
+
+        public TApplicationException(ExceptionType type, string message)
+            : base(message, null) // TApplicationException is serializable, but we never serialize InnerException
+        {
+            this.type = type;
+        }
+
+        public static TApplicationException Read(TProtocol iprot)
+        {
+            TField field;
+
+            string message = null;
+            ExceptionType type = ExceptionType.Unknown;
+
+            iprot.ReadStructBegin();
+            while (true)
+            {
+                field = iprot.ReadFieldBegin();
+                if (field.Type == TType.Stop)
+                {
+                    break;
+                }
+
+                switch (field.ID)
+                {
+                    case 1:
+                        if (field.Type == TType.String)
+                        {
+                            message = iprot.ReadString();
+                        }
+                        else
+                        {
+                            TProtocolUtil.Skip(iprot, field.Type);
+                        }
+                        break;
+                    case 2:
+                        if (field.Type == TType.I32)
+                        {
+                            type = (ExceptionType)iprot.ReadI32();
+                        }
+                        else
+                        {
+                            TProtocolUtil.Skip(iprot, field.Type);
+                        }
+                        break;
+                    default:
+                        TProtocolUtil.Skip(iprot, field.Type);
+                        break;
+                }
+
+                iprot.ReadFieldEnd();
+            }
+
+            iprot.ReadStructEnd();
+
+            return new TApplicationException(type, message);
+        }
+
+        public void Write(TProtocol oprot)
+        {
+            TStruct struc = new TStruct("TApplicationException");
+            TField field = new TField();
+
+            oprot.WriteStructBegin(struc);
+
+            if (!string.IsNullOrEmpty(Message))
+            {
+                field.Name = "message";
+                field.Type = TType.String;
+                field.ID = 1;
+                oprot.WriteFieldBegin(field);
+                oprot.WriteString(Message);
+                oprot.WriteFieldEnd();
+            }
+
+            field.Name = "type";
+            field.Type = TType.I32;
+            field.ID = 2;
+            oprot.WriteFieldBegin(field);
+            oprot.WriteI32((int)type);
+            oprot.WriteFieldEnd();
+            oprot.WriteFieldStop();
+            oprot.WriteStructEnd();
+        }
+
+        public enum ExceptionType
+        {
+            Unknown,
+            UnknownMethod,
+            InvalidMessageType,
+            WrongMethodName,
+            BadSequenceID,
+            MissingResult,
+            InternalError,
+            ProtocolError,
+            InvalidTransform,
+            InvalidProtocol,
+            UnsupportedClientType
+        }
+
+        public ExceptionType Type
+        {
+            get { return type; }
+        }
+    }
+}