1 files changed, 4 insertions, 2 deletions
diff --git a/src/mscorlib/shared/System/UnauthorizedAccessException.cs b/src/mscorlib/shared/System/UnauthorizedAccessException.cs
index 997358826f..667d576292 100644
--- a/src/mscorlib/shared/System/UnauthorizedAccessException.cs
+++ b/src/mscorlib/shared/System/UnauthorizedAccessException.cs
@@ -19,7 +19,6 @@ namespace System
 {
     // The UnauthorizedAccessException is thrown when access errors 
     // occur from IO or other OS methods.  
-    [Serializable]
     public class UnauthorizedAccessException : SystemException
     {
         public UnauthorizedAccessException()
@@ -40,6 +39,9 @@ namespace System
             HResult = __HResults.COR_E_UNAUTHORIZEDACCESS;
         }
 
-        protected UnauthorizedAccessException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+        protected UnauthorizedAccessException(SerializationInfo info, StreamingContext context) : base(info, context)
+        {
+            throw new PlatformNotSupportedException();
+        }
     }
 }