Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

external/referencesource/System.Configuration/System/Configuration/ConfigXmlComment.cs

@@ -0,0 +1,39 @@
+//------------------------------------------------------------------------------
+// <copyright file="ConfigXmlComment.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Configuration
+{
+    using System.Configuration.Internal;
+    using System.IO;
+    using System.Xml;
+    using System.Security.Permissions;
+
+    internal sealed class ConfigXmlComment : XmlComment, IConfigErrorInfo {
+        int _line;
+        string _filename;
+
+        public ConfigXmlComment( string filename, int line, string comment, XmlDocument doc )
+            : base( comment, doc ) {
+            _line = line;
+            _filename = filename;
+        }
+        int IConfigErrorInfo.LineNumber {
+            get { return _line; }
+        }
+        string IConfigErrorInfo.Filename {
+            get { return _filename; }
+        } 
+        public override XmlNode CloneNode(bool deep) {
+            XmlNode cloneNode = base.CloneNode(deep);
+            ConfigXmlComment clone = cloneNode as ConfigXmlComment;
+            if (clone != null) {
+                clone._line = _line;
+                clone._filename = _filename;
+            }
+            return cloneNode;
+        }
+    }
+}