Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Configuration/System/Configuration/Internal/IInternalConfigRoot.cs

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+//------------------------------------------------------------------------------
+// <copyright file="IInternalConfigRoot.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.IO;
+using System.Security;
+using System.Collections.Specialized;
+using System.Configuration;
+using ClassConfiguration=System.Configuration.Configuration;
+
+//
+// This file contains most of the interfaces that allow System.Web, Venus, and 
+// Whitehorse to customize configuration in some way.
+//
+// The goal of the design of customization is to only require other MS assemblies
+// to create an instance of an internal object via Activator.CreateInstance(), and then
+// use these objects through *public* System.Configuration.Internal interfaces. 
+// We do not want extenders to have to use reflection to call a method - it is slow,
+// not typesafe, and more difficult to promote correct use of the internal object.
+//
+namespace System.Configuration.Internal {
+
+    // Exposes the functionality of InternalConfigRoot.
+    [System.Runtime.InteropServices.ComVisible(false)]
+    public interface IInternalConfigRoot {
+        void                                Init(IInternalConfigHost host, bool isDesignTime);
+        bool                                IsDesignTime {get;}
+        event InternalConfigEventHandler    ConfigChanged;
+        event InternalConfigEventHandler    ConfigRemoved;
+        object                              GetSection(string section, string configPath);
+
+        // Get the configPath of the nearest ancestor that has the config data
+        string                              GetUniqueConfigPath(string configPath);   
+        
+        IInternalConfigRecord               GetUniqueConfigRecord(string configPath); 
+        IInternalConfigRecord               GetConfigRecord(string configPath);       
+        void                                RemoveConfig(string configPath);          
+    }
+}