Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

external/referencesource/System.Configuration/System/Configuration/ContextInformation.cs

@@ -0,0 +1,85 @@
+//------------------------------------------------------------------------------
+// <copyright file="ContextInformation.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+
+namespace System.Configuration
+{
+
+    // ContextInformation
+    //
+    // Class that encapsulates all of the Context Information that
+    // is going to be associated with a ConfigurationElement
+    //
+    public sealed class ContextInformation 
+    {
+        private bool   _hostingContextEvaluated;    // Do we know the Context?
+        private object _hostingContext;             // HostingContext
+        private BaseConfigurationRecord _configRecord;
+
+        // Constructor
+        //
+        //
+        internal ContextInformation( BaseConfigurationRecord configRecord )
+        {
+            Debug.Assert(configRecord != null, "configRecord != null");
+            
+            _hostingContextEvaluated = false;
+            _hostingContext          = null;
+            _configRecord            = configRecord;
+        }
+        
+        // HostingContext
+        //
+        // Retrieve the Context of the environment that we are being
+        // evaluated in. (currently this can we WebContext, ExeContext,
+        // or null)
+        //
+        public object HostingContext
+        {
+            get
+            {
+                if ( !_hostingContextEvaluated )
+                {
+                    // Retrieve Context
+                    _hostingContext = _configRecord.ConfigContext;
+
+                    _hostingContextEvaluated = true;
+                }
+
+                return _hostingContext;
+            }
+        }
+
+        // IsMachineLevel
+        //
+        // Is this the machine.config file or not?  If it is not
+        // then use the Hosting Context to determine where you are
+        // and in what hierarchy you are in
+        //
+        public bool IsMachineLevel
+        { 
+            get
+            {
+                return _configRecord.IsMachineConfig;
+            }
+        }
+
+        // GetSection
+        //
+        // Get a Section within the context of where we are.  What
+        // ever section you retrieve here will be at the same level
+        // in the hierarchy as we are.
+        //
+        // Note: Watch out for a situation where you request a section
+        //       that will call you.
+        //
+        public object GetSection(string sectionName)
+        {
+            return _configRecord.GetSection(sectionName);
+        }
+    }
+}