1 files changed, 1 insertions, 2 deletions
diff --git a/src/mscorlib/src/System/Reflection/Missing.cs b/src/mscorlib/src/System/Reflection/Missing.cs
index 8289193191..24bf77bd4e 100644
--- a/src/mscorlib/src/System/Reflection/Missing.cs
+++ b/src/mscorlib/src/System/Reflection/Missing.cs
@@ -24,11 +24,10 @@ namespace System.Reflection
         #endregion
 
         #region ISerializable
-        [System.Security.SecurityCritical]  // auto-generated_required
         void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
         {
             if (info == null)
-                throw new ArgumentNullException("info");
+                throw new ArgumentNullException(nameof(info));
             Contract.EndContractBlock();
 
             UnitySerializationHolder.GetUnitySerializationInfo(info, this);