1 files changed, 65 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/DuplicateWaitObjectException.cs b/src/mscorlib/shared/System/DuplicateWaitObjectException.cs
new file mode 100644
index 0000000000..da29e2ad76
--- /dev/null
+++ b/src/mscorlib/shared/System/DuplicateWaitObjectException.cs
@@ -0,0 +1,65 @@
+// 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 class for duplicate objects in WaitAll/WaitAny.
+**
+**
+=============================================================================*/
+
+using System.Runtime.Serialization;
+
+namespace System
+{
+    // The DuplicateWaitObjectException is thrown when an object 
+    // appears more than once in the list of objects to WaitAll or WaitAny.
+    // 
+    [Serializable]
+    public class DuplicateWaitObjectException : ArgumentException
+    {
+        private static volatile String s_duplicateWaitObjectMessage = null;
+
+        private static String DuplicateWaitObjectMessage
+        {
+            get
+            {
+                if (s_duplicateWaitObjectMessage == null)
+                    s_duplicateWaitObjectMessage = SR.Arg_DuplicateWaitObjectException;
+                return s_duplicateWaitObjectMessage;
+            }
+        }
+
+        // Creates a new DuplicateWaitObjectException with its message 
+        // string set to a default message.
+        public DuplicateWaitObjectException()
+            : base(DuplicateWaitObjectMessage)
+        {
+            HResult = __HResults.COR_E_DUPLICATEWAITOBJECT;
+        }
+
+        public DuplicateWaitObjectException(String parameterName)
+            : base(DuplicateWaitObjectMessage, parameterName)
+        {
+            HResult = __HResults.COR_E_DUPLICATEWAITOBJECT;
+        }
+
+        public DuplicateWaitObjectException(String parameterName, String message)
+            : base(message, parameterName)
+        {
+            HResult = __HResults.COR_E_DUPLICATEWAITOBJECT;
+        }
+
+        public DuplicateWaitObjectException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+            HResult = __HResults.COR_E_DUPLICATEWAITOBJECT;
+        }
+
+        // This constructor is required for serialization
+        protected DuplicateWaitObjectException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+    }
+}