如何编辑WCF消息-WCF消息拦截器

| 我在实现WCF消息拦截器时遇到一些问题。基本上，我正在访问主体内容，并在节点集上执行xslt转换以按字母顺序对其进行排序。我已经测试了XSLT样式表，并且没有任何问题。我将转换结果写入MemoryStream对象，然后尝试从流内容中重新创建消息。我使用StreamReader或将其加载到XmlDocument中来检查生成的流，并且可以看到包含它的xml从XSLT转换得到的预期结果。当我尝试重新创建消息时出现我的问题！我基于该流创建一个XmlReader，并将其用作Message.CreateMessage（.....）;的正文源。我不明白为什么当我可以检查并更早地看到一些声明时，为什么突然丢失了流中的“正确”内容。非常感谢帮助！以下方法的完整代码：

public object AfterReceiveRequest(ref System.ServiceModel.Channels.Message request,   IClientChannel channel, InstanceContext instanceContext)
    {

        MessageBuffer msgbuf = request.CreateBufferedCopy(int.MaxValue);
        Message tmpMessage = msgbuf.CreateMessage();
        XmlDictionaryReader xdr = tmpMessage.GetReaderAtBodyContents();

        MemoryStream ms = new MemoryStream();
        _compiledTransform.Transform(xdr,null,ms);

        ms.Position = 0;
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.Load(ms);

        MemoryStream newStream = new MemoryStream();
        xmlDoc.Save(newStream);
        newStream.Position = 0;

        //To debug contents of the stream
        StreamReader sr = new StreamReader(newStream);
        var temp = sr.ReadToEnd();
        //At this point the XSLT tranforms has resulted in the fragment we want so all good!


        XmlReaderSettings settings = new XmlReaderSettings();
        settings.ConformanceLevel = ConformanceLevel.Fragment;
        newStream.Position = 0;
        XmlReader reader = XmlReader.Create(newStream,settings);
        reader.MoveToContent();

        //Reader seems to have lost the correct fragment!!! At least returned message does not contain correct fragment.
        Message newMessage = Message.CreateMessage(request.Version, null, reader);
        newMessage.Properties.CopyProperties(request.Properties);
        request = newMessage;

        return request;
    }