Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Configuration/System/Configuration/ConfigurationElementProperty.cs

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+//------------------------------------------------------------------------------
+// <copyright file="ConfigurationElementProperty.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 {
+
+    //  Although in Whidbey this class contain just one property, but we still do this this way, 
+    // instead of exposing a Validator property in ConfigurationElement, because if we need 
+    // another property in the future we'll expand this ElementProperty class rather than adding a 
+    // new overridable on ConfigurationElement
+    public sealed class ConfigurationElementProperty {
+        private ConfigurationValidatorBase _validator;
+
+        public ConfigurationElementProperty(ConfigurationValidatorBase validator) {
+            if (validator == null) {
+                throw new ArgumentNullException("validator");
+            }
+
+            _validator = validator;
+        }
+        public ConfigurationValidatorBase Validator {
+            get {
+                return _validator;
+            }
+        }
+    }
+}