Imported Upstream version 4.2.0.179

Former-commit-id: 0a113cb3a6feb7873f632839b1307cc6033cd595

external/referencesource/System.Configuration/System/Configuration/RegexStringValidatorAttribute.cs

@@ -0,0 +1,41 @@
+//------------------------------------------------------------------------------
+// <copyright file="RegexStringValidatorAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Configuration.Internal;
+using System.Collections;
+using System.Collections.Specialized;
+using System.Collections.Generic;
+using System.IO;
+using System.Reflection;
+using System.Security.Permissions;
+using System.Xml;
+using System.Globalization;
+using System.ComponentModel;
+using System.Security;
+using System.Text;
+
+namespace System.Configuration {
+
+    [AttributeUsage(AttributeTargets.Property)]
+    public sealed class RegexStringValidatorAttribute : ConfigurationValidatorAttribute {
+        private string _regex;
+
+        public RegexStringValidatorAttribute(string regex) {
+            _regex = regex;
+        }
+        public override ConfigurationValidatorBase ValidatorInstance {
+            get {
+                return new RegexStringValidator(_regex);
+            }
+        }
+        public string Regex {
+            get {
+                return _regex;
+            }
+        }
+    }
+}