Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,28 @@
+//------------------------------------------------------------------------------
+// <copyright file="ConfigurationValidatorBase.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Collections;
+using System.IO;
+using System.Reflection;
+using System.Security.Permissions;
+using System.Xml;
+using System.Collections.Specialized;
+using System.Globalization;
+using System.ComponentModel;
+using System.Security;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace System.Configuration {
+
+    public abstract class ConfigurationValidatorBase {
+        public virtual bool CanValidate(Type type) {
+            return false;
+        }
+        public abstract void Validate(object value);
+    }
+}