Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web.Extensions/ui/ResourceCategoryAttribute.cs

@@ -0,0 +1,39 @@
+//------------------------------------------------------------------------------
+// <copyright file="ResourceCategoryAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI {
+
+    using System;
+    using System.ComponentModel;
+    using System.Reflection;
+    using System.Web.Resources;
+    using System.Web.Util;
+
+    [AttributeUsage(AttributeTargets.All)]
+    internal sealed class ResourceCategoryAttribute : CategoryAttribute {
+
+        internal ResourceCategoryAttribute(string category)
+            : base(category) {
+        }
+
+        public override object TypeId {
+            get {
+                return typeof(CategoryAttribute);
+            }
+        }
+        
+        protected override string GetLocalizedString(string value) {
+            string localizedValue = base.GetLocalizedString(value);
+            if (localizedValue == null) {
+                localizedValue = AtlasWeb.ResourceManager.GetString("Category_" + value, AtlasWeb.Culture);
+            }
+            // This attribute is internal, and we should never have a missing resource string.
+            //
+            System.Diagnostics.Debug.Assert(localizedValue != null, "All WebForms category attributes should have localized strings.  Category '" + value + "' not found.");
+            return localizedValue;
+        }
+    }
+}