1 files changed, 22 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/FlagsAttribute.cs b/src/mscorlib/shared/System/FlagsAttribute.cs
new file mode 100644
index 0000000000..5f8c108ae4
--- /dev/null
+++ b/src/mscorlib/shared/System/FlagsAttribute.cs
@@ -0,0 +1,22 @@
+// 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
+{
+    // Custom attribute to indicate that the enum
+    // should be treated as a bitfield (or set of flags).
+    // An IDE may use this information to provide a richer
+    // development experience.
+    [Serializable]
+    [AttributeUsage(AttributeTargets.Enum, Inherited = false)]
+    public class FlagsAttribute : Attribute
+    {
+        public FlagsAttribute()
+        {
+        }
+    }
+}