1 files changed, 61 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/ObsoleteAttribute.cs b/src/mscorlib/shared/System/ObsoleteAttribute.cs
new file mode 100644
index 0000000000..f183685998
--- /dev/null
+++ b/src/mscorlib/shared/System/ObsoleteAttribute.cs
@@ -0,0 +1,61 @@
+// 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: Attribute for functions, etc that will be removed.
+**
+** 
+===========================================================*/
+
+using System;
+
+namespace System
+{
+    // This attribute is attached to members that are not to be used any longer.
+    // Message is some human readable explanation of what to use
+    // Error indicates if the compiler should treat usage of such a method as an
+    //   error. (this would be used if the actual implementation of the obsolete 
+    //   method's implementation had changed).
+    // 
+    [Serializable]
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum |
+        AttributeTargets.Interface | AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Event | AttributeTargets.Delegate
+        , Inherited = false)]
+    public sealed class ObsoleteAttribute : Attribute
+    {
+        private String _message;
+        private bool _error;
+
+        public ObsoleteAttribute()
+        {
+            _message = null;
+            _error = false;
+        }
+
+        public ObsoleteAttribute(String message)
+        {
+            _message = message;
+            _error = false;
+        }
+
+        public ObsoleteAttribute(String message, bool error)
+        {
+            _message = message;
+            _error = error;
+        }
+
+        public String Message
+        {
+            get { return _message; }
+        }
+
+        public bool IsError
+        {
+            get { return _error; }
+        }
+    }
+}