1 files changed, 1 insertions, 1 deletions
diff --git a/src/mscorlib/src/System/Runtime/InteropServices/MarshalDirectiveException.cs b/src/mscorlib/src/System/Runtime/InteropServices/MarshalDirectiveException.cs
index 6fe7574e26..75b291af30 100644
--- a/src/mscorlib/src/System/Runtime/InteropServices/MarshalDirectiveException.cs
+++ b/src/mscorlib/src/System/Runtime/InteropServices/MarshalDirectiveException.cs
@@ -17,7 +17,6 @@ using System.Runtime.Serialization;
 
 namespace System.Runtime.InteropServices
 {
-    [Serializable]
     public class MarshalDirectiveException : SystemException
     {
         public MarshalDirectiveException()
@@ -40,6 +39,7 @@ namespace System.Runtime.InteropServices
 
         protected MarshalDirectiveException(SerializationInfo info, StreamingContext context) : base(info, context)
         {
+            throw new PlatformNotSupportedException();
         }
     }
 }