Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Xml/System/Xml/Dom/XmlImplementation.cs

@@ -0,0 +1,45 @@
+//------------------------------------------------------------------------------
+// <copyright file="XmlImplementation.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>
+//------------------------------------------------------------------------------
+
+using System.Globalization;
+
+namespace System.Xml {
+
+    // Provides methods for performing operations that are independent of any
+    // particular instance of the document object model.
+    public class XmlImplementation {
+
+        private XmlNameTable nameTable;
+
+        // Initializes a new instance of the XmlImplementation class.
+        public XmlImplementation() : this( new NameTable() ) {
+        }
+
+        public XmlImplementation( XmlNameTable nt ) {
+            nameTable = nt;
+        }
+
+        // Test if the DOM implementation implements a specific feature.
+        public bool HasFeature(string strFeature, string strVersion) {
+            if (String.Compare("XML", strFeature, StringComparison.OrdinalIgnoreCase) == 0) {
+                if (strVersion == null || strVersion == "1.0" || strVersion == "2.0")
+                    return true;
+            }
+            return false;
+        }
+
+        // Creates a new XmlDocument. All documents created from the same 
+        // XmlImplementation object share the same name table.
+        public virtual XmlDocument CreateDocument() {
+            return new XmlDocument( this );
+        }
+
+        internal XmlNameTable NameTable {
+            get { return nameTable; }
+        }
+    }
+}