1 files changed, 53 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/ArgumentNullException.cs b/src/mscorlib/shared/System/ArgumentNullException.cs
new file mode 100644
index 0000000000..3a86223ccf
--- /dev/null
+++ b/src/mscorlib/shared/System/ArgumentNullException.cs
@@ -0,0 +1,53 @@
+// 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 null arguments to a method.
+**
+**
+=============================================================================*/
+
+using System.Runtime.Serialization;
+
+namespace System
+{
+    // The ArgumentException is thrown when an argument 
+    // is null when it shouldn't be.
+    // 
+    [Serializable]
+    public class ArgumentNullException : ArgumentException
+    {
+        // Creates a new ArgumentNullException with its message 
+        // string set to a default message explaining an argument was null.
+        public ArgumentNullException()
+             : base(SR.ArgumentNull_Generic)
+        {
+            // Use E_POINTER - COM used that for null pointers.  Description is "invalid pointer"
+            HResult = __HResults.E_POINTER;
+        }
+
+        public ArgumentNullException(String paramName)
+            : base(SR.ArgumentNull_Generic, paramName)
+        {
+            HResult = __HResults.E_POINTER;
+        }
+
+        public ArgumentNullException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+            HResult = __HResults.E_POINTER;
+        }
+
+        public ArgumentNullException(String paramName, String message)
+            : base(message, paramName)
+        {
+            HResult = __HResults.E_POINTER;
+        }
+
+        protected ArgumentNullException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+    }
+}