More of System.Diagnostics.Private

2 files changed, 4 insertions, 1 deletions

diff --git a/src/Common/src/CoreLib/System/String.Comparison.cs b/src/Common/src/CoreLib/System/String.Comparison.cs
index 32951b4aa5..fdb4704a96 100644
--- a/src/Common/src/CoreLib/System/String.Comparison.cs
+++ b/src/Common/src/CoreLib/System/String.Comparison.cs
@@ -2,7 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using System.Diagnostics;
+using System.Diagnostics.Private;
 using System.Globalization;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
diff --git a/src/Common/src/CoreLib/System/String.cs b/src/Common/src/CoreLib/System/String.cs
index 07d65ead43..8af736978a 100644
--- a/src/Common/src/CoreLib/System/String.cs
+++ b/src/Common/src/CoreLib/System/String.cs
@@ -6,6 +6,7 @@ using System.Buffers;
 using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Diagnostics.Private;
 using System.Globalization;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -20,7 +21,9 @@ namespace System
     // positions (indices) are zero-based.
 
     [Serializable]
+#if !MONO
     [System.Runtime.CompilerServices.TypeForwardedFrom("mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
+#endif
     public sealed partial class String : IComparable, IEnumerable, IEnumerable<char>, IComparable<String>, IEquatable<String>, IConvertible, ICloneable
     {
         // String constructors