1 files changed, 1 insertions, 1 deletions
diff --git a/src/mscorlib/src/System/Collections/Generic/DebugView.cs b/src/mscorlib/src/System/Collections/Generic/DebugView.cs
index 57b91eff51..d0711e551e 100644
--- a/src/mscorlib/src/System/Collections/Generic/DebugView.cs
+++ b/src/mscorlib/src/System/Collections/Generic/DebugView.cs
@@ -110,7 +110,7 @@ namespace System.Collections.Generic {
         
         public Mscorlib_KeyedCollectionDebugView(KeyedCollection<K, T> keyedCollection) {
             if (keyedCollection == null) {
-                throw new ArgumentNullException("keyedCollection");
+                throw new ArgumentNullException(nameof(keyedCollection));
             }
             Contract.EndContractBlock();