1 files changed, 48 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/ComponentModel/EditorBrowsableAttribute.cs b/src/mscorlib/src/System/ComponentModel/EditorBrowsableAttribute.cs
new file mode 100644
index 0000000000..a7946f8203
--- /dev/null
+++ b/src/mscorlib/src/System/ComponentModel/EditorBrowsableAttribute.cs
@@ -0,0 +1,48 @@
+// 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.ComponentModel
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum | AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Event | AttributeTargets.Delegate | AttributeTargets.Interface)]
+    public sealed class EditorBrowsableAttribute : Attribute
+    {
+        private EditorBrowsableState browsableState;
+
+        public EditorBrowsableAttribute(EditorBrowsableState state)
+        {
+            browsableState = state;
+        }
+
+        public EditorBrowsableAttribute () : this(EditorBrowsableState.Always) { }
+
+        public EditorBrowsableState State
+        {
+            get { return browsableState; }
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj == this)
+            {
+                return true;
+            }
+
+            EditorBrowsableAttribute other = obj as EditorBrowsableAttribute;
+
+            return (other != null) && other.browsableState == browsableState;
+        }
+
+        public override int GetHashCode()
+        {
+            return base.GetHashCode();
+        }
+    }
+
+    public enum EditorBrowsableState
+    {
+        Always,
+        Never,
+        Advanced
+    }
+}