add metadata attrib for net4

1 files changed, 25 insertions, 0 deletions

diff --git a/crypto/src/AssemblyInfo.cs b/crypto/src/AssemblyInfo.cs
index 022895b0a..43935c8dc 100644
--- a/crypto/src/AssemblyInfo.cs
+++ b/crypto/src/AssemblyInfo.cs
@@ -61,3 +61,28 @@ internal class AssemblyInfo
         }
     }
 }
+
+
+#if NET40
+// 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.
+
+namespace System.Reflection
+{
+    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true, Inherited = false)]
+    internal sealed class AssemblyMetadataAttribute : Attribute
+    {
+        public AssemblyMetadataAttribute(string key, string value)
+        {
+            Key = key;
+            Value = value;
+        }
+
+        public string Key { get; }
+
+        public string Value { get; }
+    }
+}
+
+#endif
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