1 files changed, 4 insertions, 7 deletions
diff --git a/src/mscorlib/src/System/Runtime/InteropServices/WindowsRuntime/BindableVectorToCollectionAdapter.cs b/src/mscorlib/src/System/Runtime/InteropServices/WindowsRuntime/BindableVectorToCollectionAdapter.cs
index 5574f3c251..e3c6a926d3 100644
--- a/src/mscorlib/src/System/Runtime/InteropServices/WindowsRuntime/BindableVectorToCollectionAdapter.cs
+++ b/src/mscorlib/src/System/Runtime/InteropServices/WindowsRuntime/BindableVectorToCollectionAdapter.cs
@@ -9,6 +9,7 @@ using System.Runtime;
 using System.Security;
 using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Diagnostics.Contracts;
 using System.Runtime.InteropServices;
 using System.Runtime.CompilerServices;
@@ -27,12 +28,11 @@ namespace System.Runtime.InteropServices.WindowsRuntime
     {
         private BindableVectorToCollectionAdapter()
         {
-            Contract.Assert(false, "This class is never instantiated");
+            Debug.Assert(false, "This class is never instantiated");
         }
 
         // int Count { get }
         [Pure]
-        [SecurityCritical]
         internal int Count()
         {
             IBindableVector _this = JitHelpers.UnsafeCast<IBindableVector>(this);
@@ -47,7 +47,6 @@ namespace System.Runtime.InteropServices.WindowsRuntime
 
         // bool IsSynchronized { get }
         [Pure]
-        [SecurityCritical]
         internal bool IsSynchronized()
         {
             return false;
@@ -55,7 +54,6 @@ namespace System.Runtime.InteropServices.WindowsRuntime
 
         // object SyncRoot { get }
         [Pure]
-        [SecurityCritical]
         internal object SyncRoot()
         {
             return this;
@@ -63,11 +61,10 @@ namespace System.Runtime.InteropServices.WindowsRuntime
 
         // void CopyTo(Array array, int index)
         [Pure]
-        [SecurityCritical]
         internal void CopyTo(Array array, int arrayIndex)
         {
             if (array == null)
-                throw new ArgumentNullException("array");
+                throw new ArgumentNullException(nameof(array));
 
             // ICollection expects the destination array to be single-dimensional.
             if (array.Rank != 1)
@@ -79,7 +76,7 @@ namespace System.Runtime.InteropServices.WindowsRuntime
             int destLen = array.GetLength(0);
 
             if (arrayIndex < destLB)
-                throw new ArgumentOutOfRangeException("arrayIndex");
+                throw new ArgumentOutOfRangeException(nameof(arrayIndex));
 
             // Does the dimension in question have sufficient space to copy the expected number of entries?
             // We perform this check before valid index check to ensure the exception message is in sync with