1 files changed, 40 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/NotImplementedException.cs b/src/mscorlib/shared/System/NotImplementedException.cs
new file mode 100644
index 0000000000..4d141eac8c
--- /dev/null
+++ b/src/mscorlib/shared/System/NotImplementedException.cs
@@ -0,0 +1,40 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*=============================================================================
+**
+**
+**
+** Purpose: Exception thrown when a requested method or operation is not 
+**            implemented.
+**
+**
+=============================================================================*/
+
+using System.Runtime.Serialization;
+
+namespace System
+{
+    [Serializable]
+    public class NotImplementedException : SystemException
+    {
+        public NotImplementedException()
+            : base(SR.Arg_NotImplementedException)
+        {
+            HResult = __HResults.E_NOTIMPL;
+        }
+        public NotImplementedException(String message)
+            : base(message)
+        {
+            HResult = __HResults.E_NOTIMPL;
+        }
+        public NotImplementedException(String message, Exception inner)
+            : base(message, inner)
+        {
+            HResult = __HResults.E_NOTIMPL;
+        }
+
+        protected NotImplementedException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+    }
+}