Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/DataKeyPropertyAttribute.cs

@@ -0,0 +1,43 @@
+//------------------------------------------------------------------------------
+// <copyright file="DataKeyPropertyAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI {
+    using System;
+    using System.ComponentModel;
+    using System.Diagnostics;
+    using System.Security.Permissions;
+    using System.Web.Util;
+    using System.Diagnostics.CodeAnalysis;
+    
+    [AttributeUsage(AttributeTargets.Class)]
+    public sealed class DataKeyPropertyAttribute : Attribute {
+        private readonly string _name;
+
+        public DataKeyPropertyAttribute(string name) {
+            _name = name;
+        }
+        
+        public string Name {
+            get {
+                return _name;
+            }
+        }
+
+        [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        public override bool Equals(object obj) {
+            DataKeyPropertyAttribute other = obj as DataKeyPropertyAttribute;
+            if (other != null) {
+                return String.Equals(_name, other.Name, StringComparison.Ordinal);
+            }
+            return false;
+        }
+
+        [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        public override int GetHashCode() {
+            return (Name != null) ? Name.GetHashCode() : 0;
+        }
+    }
+}