1 files changed, 39 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/Runtime/CompilerServices/ReferenceAssemblyAttribute.cs b/src/mscorlib/src/System/Runtime/CompilerServices/ReferenceAssemblyAttribute.cs
new file mode 100644
index 0000000000..d5e64a1177
--- /dev/null
+++ b/src/mscorlib/src/System/Runtime/CompilerServices/ReferenceAssemblyAttribute.cs
@@ -0,0 +1,39 @@
+// 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.
+
+/*============================================================
+**
+** Attribute: ReferenceAssemblyAttribute
+**
+** Purpose: Identifies an assembly as being a "reference 
+**    assembly", meaning it contains public surface area but
+**    no usable implementation.  Reference assemblies 
+**    should be loadable for introspection, but not execution.
+**
+============================================================*/
+namespace System.Runtime.CompilerServices 
+{    
+    using System;
+    
+    [Serializable]
+    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple=false)]
+    public sealed class ReferenceAssemblyAttribute : Attribute
+    {
+        private String _description;  // Maybe ".NET FX v4.0 SP1, partial trust"?
+
+        public ReferenceAssemblyAttribute()
+        {
+        }
+
+        public ReferenceAssemblyAttribute(String description)
+        {
+            _description = description;
+        }
+
+        public String Description
+        {
+            get { return _description; }
+        }
+    }
+}