public string replyContent(string ToUserName, string FromUserName, string Content)
        {
            ReplyContent replycontext = new ReplyContent();

            replycontext.ToUserName   = "******" + ToUserName + "]]>";
            replycontext.FromUserName = "******" + FromUserName + "]]>";
            replycontext.CreateTime   = Util.ConvertDateTimeInt(DateTime.Now);
            replycontext.MsgType      = "<![CDATA[" + FromUserName + "]]>";
            replycontext.Content      = "<![CDATA[" + Content + "]]>";
            //序列化这个对象
            string        str = "";
            XmlSerializer xz  = new XmlSerializer(replycontext.GetType());

            using (StringWriter sw = new StringWriter())
            {
                XmlWriterSettings settings = new XmlWriterSettings();
                settings.OmitXmlDeclaration = false;
                XmlSerializerNamespaces xns = new XmlSerializerNamespaces();
                xns.Add("", "");
                xz.Serialize(sw, replycontext, xns);
                //xz.Serialize(sw, replycontext);
                str = sw.ToString();
            }
            //str = str.Replace("","");
            str = str.Substring(str.IndexOf("<xml>"));
            str = str.Replace("\r\n", "");
            return(str);
        }