1 files changed, 25 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/StringFreezingAttribute.cs b/src/mscorlib/src/System/StringFreezingAttribute.cs
new file mode 100644
index 0000000000..d488a88445
--- /dev/null
+++ b/src/mscorlib/src/System/StringFreezingAttribute.cs
@@ -0,0 +1,25 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*============================================================
+**
+**
+**
+** Purpose:     Custom attribute to indicate that strings should be frozen
+**
+**
+===========================================================*/
+
+namespace System.Runtime.CompilerServices
+{
+    
+[Serializable]
+    [AttributeUsage(AttributeTargets.Assembly, Inherited = false)]
+    public sealed class StringFreezingAttribute : Attribute
+    {
+        public StringFreezingAttribute()
+        {
+        }
+    }
+}