Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/mscorlib/system/nullreferenceexception.cs

@@ -0,0 +1,42 @@
+// ==++==
+// 
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// ==--==
+/*=============================================================================
+**
+** Class: NullReferenceException
+**
+**
+** Purpose: Exception class for dereferencing a null reference.
+**
+**
+=============================================================================*/
+
+namespace System {   
+    
+    using System;
+    using System.Runtime.Serialization;
+[System.Runtime.InteropServices.ComVisible(true)]
+    [Serializable]
+    public class NullReferenceException : SystemException {
+        public NullReferenceException() 
+            : base(Environment.GetResourceString("Arg_NullReferenceException")) {
+            SetErrorCode(__HResults.COR_E_NULLREFERENCE);
+        }
+    
+        public NullReferenceException(String message) 
+            : base(message) {
+            SetErrorCode(__HResults.COR_E_NULLREFERENCE);
+        }
+        
+        public NullReferenceException(String message, Exception innerException) 
+            : base(message, innerException) {
+            SetErrorCode(__HResults.COR_E_NULLREFERENCE);
+        }
+
+        protected NullReferenceException(SerializationInfo info, StreamingContext context) : base(info, context) {}
+
+    }
+
+}