Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebParts/WebDisplayNameAttribute.cs

@@ -0,0 +1,57 @@
+//------------------------------------------------------------------------------
+// <copyright file="WebDisplayNameAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls.WebParts {
+    using System;
+
+    [AttributeUsage(AttributeTargets.Property)]
+    public class WebDisplayNameAttribute : Attribute {
+        public static readonly WebDisplayNameAttribute Default = new WebDisplayNameAttribute();
+
+        private string _displayName;
+
+        public WebDisplayNameAttribute() : this(String.Empty) {
+        }
+
+        public WebDisplayNameAttribute(string displayName) {
+            _displayName = displayName;
+        }
+
+        public virtual string DisplayName {
+            get {
+                return DisplayNameValue;
+            }
+        }
+
+        protected string DisplayNameValue {
+            get {
+                return _displayName;
+            }
+            set {
+                _displayName = value;
+            }
+        }
+
+        public override bool Equals(object obj) {
+            if (obj == this) {
+                return true;
+            }
+
+            WebDisplayNameAttribute other = obj as WebDisplayNameAttribute;
+            return (other != null) && other.DisplayName == DisplayName;
+        }
+
+        public override int GetHashCode() {
+            return DisplayName.GetHashCode();
+        }
+
+        /// <internalonly/>
+        public override bool IsDefaultAttribute() {
+            return (this.Equals(Default));
+        }
+    }
+}
+