Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.ServiceModel/System/ServiceModel/Channels/CloseSequence.cs

@@ -0,0 +1,76 @@
+//----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//----------------------------------------------------------------------------
+
+namespace System.ServiceModel.Channels
+{
+    using System.Runtime;
+    using System.Xml;
+
+    sealed class CloseSequence : BodyWriter
+    {
+        UniqueId identifier;
+        Int64 lastMsgNumber;
+
+        public CloseSequence(UniqueId identifier, Int64 lastMsgNumber)
+            : base(true)
+        {
+            this.identifier = identifier;
+            this.lastMsgNumber = lastMsgNumber;
+        }
+
+        public static CloseSequenceInfo Create(XmlDictionaryReader reader)
+        {
+            if (reader == null)
+            {
+                Fx.Assert("Argument reader cannot be null.");
+            }
+
+            CloseSequenceInfo closeSequenceInfo = new CloseSequenceInfo();
+
+            XmlDictionaryString wsrmNs = WsrmIndex.GetNamespace(ReliableMessagingVersion.WSReliableMessaging11);
+            Wsrm11Dictionary wsrm11Dictionary = DXD.Wsrm11Dictionary;
+
+            reader.ReadStartElement(wsrm11Dictionary.CloseSequence, wsrmNs);
+            reader.ReadStartElement(XD.WsrmFeb2005Dictionary.Identifier, wsrmNs);
+            closeSequenceInfo.Identifier = reader.ReadContentAsUniqueId();
+            reader.ReadEndElement();
+
+            if (reader.IsStartElement(wsrm11Dictionary.LastMsgNumber, wsrmNs))
+            {
+                reader.ReadStartElement();
+                closeSequenceInfo.LastMsgNumber = WsrmUtilities.ReadSequenceNumber(reader, false);
+                reader.ReadEndElement();
+            }
+
+            while (reader.IsStartElement())
+            {
+                reader.Skip();
+            }
+
+            reader.ReadEndElement();
+
+            return closeSequenceInfo;
+        }
+
+        protected override void OnWriteBodyContents(XmlDictionaryWriter writer)
+        {
+            XmlDictionaryString wsrmNs = WsrmIndex.GetNamespace(ReliableMessagingVersion.WSReliableMessaging11);
+            Wsrm11Dictionary wsrm11Dictionary = DXD.Wsrm11Dictionary;
+
+            writer.WriteStartElement(wsrm11Dictionary.CloseSequence, wsrmNs);
+            writer.WriteStartElement(XD.WsrmFeb2005Dictionary.Identifier, wsrmNs);
+            writer.WriteValue(this.identifier);
+            writer.WriteEndElement();
+
+            if (this.lastMsgNumber > 0)
+            {
+                writer.WriteStartElement(wsrm11Dictionary.LastMsgNumber, wsrmNs);
+                writer.WriteValue(this.lastMsgNumber);
+                writer.WriteEndElement();
+            }
+
+            writer.WriteEndElement();
+        }
+    }
+}