winform post xml 并获取返回xml

        public XDocument sendXmlAndGetResponse(XDocument xDocument)
        {
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(xDocument.Document.ToString());
            WebResponse resp;
            string strUrl = XMLTools.getXmlValue("LFListenerAddress", "Address");// "http://localhost:8008/hello/";
            HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(strUrl);
            myRequest.ContentType = "text/xml";
            myRequest.Method = "POST";
            Stream stm = myRequest.GetRequestStream();
            doc.Save(stm);
            stm.Close();
            resp = myRequest.GetResponse();
            stm = resp.GetResponseStream();

            var reDoc = new XmlDocument();
            reDoc.Load(stm);

            return reDoc.ToXDocument();
        }