Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.IdentityModel/System/IdentityModel/EncryptionMethodElement.cs

@@ -0,0 +1,75 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.IdentityModel
+{
+    using System.IdentityModel.Diagnostics;
+    using System.Xml;
+    
+    internal class EncryptionMethodElement
+    {
+        private string _algorithm;
+        private string _parameters;
+
+        public string Algorithm
+        {
+            get { return _algorithm; }
+            set { _algorithm = value; }
+        }
+
+        public string Parameters
+        {
+            get { return _parameters; }
+            set { _parameters = value; }
+        }
+
+        public void ReadXml( XmlDictionaryReader reader )
+        {
+            if ( reader == null )
+            {
+                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull( "reader" );
+            }
+
+            reader.MoveToContent();
+            if ( !reader.IsStartElement( XmlEncryptionConstants.Elements.EncryptionMethod, XmlEncryptionConstants.Namespace ) )
+            {
+                return;
+            }
+
+            _algorithm = reader.GetAttribute( XmlEncryptionConstants.Attributes.Algorithm, null );
+
+            if ( !reader.IsEmptyElement )
+            {
+                //
+                // Trace unread missing element
+                //
+
+                string xml = reader.ReadOuterXml();
+                if ( DiagnosticUtility.ShouldTraceWarning )
+                {
+                    TraceUtility.TraceString( System.Diagnostics.TraceEventType.Warning, SR.GetString( SR.ID8024, reader.Name, reader.NamespaceURI, xml ) );
+                }
+            }
+            else
+            {
+                //
+                // Read to the next element
+                //
+                reader.Read();
+            }
+        }
+
+        public void WriteXml( XmlWriter writer )
+        {
+            writer.WriteStartElement( XmlEncryptionConstants.Prefix, XmlEncryptionConstants.Elements.EncryptionMethod, XmlEncryptionConstants.Namespace );
+
+            writer.WriteAttributeString( XmlEncryptionConstants.Attributes.Algorithm, null, _algorithm );
+
+            // <EncryptionMethod>
+
+            writer.WriteEndElement(); 
+        }
+
+    }
+}