1 files changed, 4 insertions, 2 deletions
diff --git a/src/mscorlib/shared/System/TimeZoneNotFoundException.cs b/src/mscorlib/shared/System/TimeZoneNotFoundException.cs
index ee21c2524f..5b7ce10268 100644
--- a/src/mscorlib/shared/System/TimeZoneNotFoundException.cs
+++ b/src/mscorlib/shared/System/TimeZoneNotFoundException.cs
@@ -6,7 +6,6 @@ using System.Runtime.Serialization;
 
 namespace System
 {
-    [Serializable]
     public class TimeZoneNotFoundException : Exception
     {
         public TimeZoneNotFoundException()
@@ -23,6 +22,9 @@ namespace System
         {
         }
 
-        protected TimeZoneNotFoundException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+        protected TimeZoneNotFoundException(SerializationInfo info, StreamingContext context) : base(info, context)
+        {
+            throw new PlatformNotSupportedException();
+        }
     }
 }