Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/Configuration/CheckPair.cs

@@ -0,0 +1,57 @@
+//------------------------------------------------------------------------------
+// <copyright file="CheckPair.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Configuration {
+    using System;
+    using System.Collections;
+    using System.Collections.Specialized;
+    using System.Configuration;
+    using System.Text;
+    using System.Text.RegularExpressions;
+    using System.Web.Compilation;
+    using System.Web.UI;
+    using System.Web.Util;
+    using System.Xml;
+    using System.Globalization;
+
+    internal class CheckPair {
+        private string _header;
+        private string _match;
+        private bool _nonMatch;
+        internal CheckPair(string header, string match, bool nonMatch) {
+            _header = header;
+            _match = match;
+            _nonMatch = nonMatch;
+            //check validity of match string at parse time
+            Regex regex = new Regex(match);
+        }
+
+        internal CheckPair(string header, string match) {
+            _header = header;
+            _match = match;
+            _nonMatch = false;
+            Regex regex = new Regex(match);
+        }
+
+        public string Header {
+            get {
+                return _header;
+            }
+        }
+
+        public string MatchString {
+            get {
+                return _match;
+            }
+        }
+
+        public bool NonMatch {
+            get {
+                return _nonMatch;
+            }
+        }
+    }
+}