1 files changed, 1 insertions, 1 deletions
diff --git a/src/mscorlib/src/System/Runtime/InteropServices/SEHException.cs b/src/mscorlib/src/System/Runtime/InteropServices/SEHException.cs
index 5595fadc43..d61e79757c 100644
--- a/src/mscorlib/src/System/Runtime/InteropServices/SEHException.cs
+++ b/src/mscorlib/src/System/Runtime/InteropServices/SEHException.cs
@@ -19,7 +19,6 @@ namespace System.Runtime.InteropServices
 {
     // Exception for Structured Exception Handler exceptions.
     // 
-    [Serializable]
     public class SEHException : ExternalException
     {
         public SEHException()
@@ -42,6 +41,7 @@ namespace System.Runtime.InteropServices
 
         protected SEHException(SerializationInfo info, StreamingContext context) : base(info, context)
         {
+            throw new PlatformNotSupportedException();
         }
 
         // Exceptions can be resumable, meaning a filtered exception