Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/WebSysDefaultValueAttribute.cs

@@ -0,0 +1,52 @@
+//------------------------------------------------------------------------------
+// <copyright file="WebSysDefaultValueAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web {
+
+    using System;
+    using System.ComponentModel;
+
+    [AttributeUsage(AttributeTargets.All)]
+    internal sealed class WebSysDefaultValueAttribute : DefaultValueAttribute {
+
+        private Type _type;
+        private bool _localized;
+
+        internal WebSysDefaultValueAttribute(Type type, string value) : base(value) {
+            _type = type;
+        }
+
+        internal WebSysDefaultValueAttribute(string value) : base(value) { }
+
+        public override object TypeId {
+            get {
+                return typeof(DefaultValueAttribute);
+            }
+        }
+
+        public override object Value {
+            get {
+                if (!_localized) {
+                    _localized = true;
+                    string baseValue = (string)base.Value;
+                    if (!String.IsNullOrEmpty(baseValue)) {
+                        object value = SR.GetString(baseValue);
+                        if (_type != null) {
+                            try {
+                                value = TypeDescriptor.GetConverter(_type).ConvertFromInvariantString((string) value);
+                            }
+                            catch (NotSupportedException) {
+                                value = null;
+                            }
+                        }
+                        base.SetValue(value);
+                    }
+                }
+                return base.Value;
+            }
+        }
+    }
+}