Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web.DynamicData/UI/ResourceDescriptionAttribute.cs

@@ -0,0 +1,32 @@
+//------------------------------------------------------------------------------
+// <copyright file="ResourceDescriptionAttribute.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;
+
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Property | AttributeTargets.Event, Inherited = true, AllowMultiple = false)]
+    internal sealed class ResourceDescriptionAttribute : DescriptionAttribute {
+        private bool _resourceLoaded;
+        private readonly string _descriptionResourceName;
+
+        public ResourceDescriptionAttribute(string descriptionResourceName) {
+            _descriptionResourceName = descriptionResourceName;
+        }
+
+        public override string Description {
+            get {
+                if (!_resourceLoaded) {
+                    _resourceLoaded = true;
+                    DescriptionValue = DynamicDataResources.ResourceManager.GetString(_descriptionResourceName, DynamicDataResources.Culture);
+                }
+                return base.Description;
+            }
+        }
+    }
+}