public WBAccessReplyResponse(string xmlFile)
        {
            if (xmlFile!=string.Empty)
            {
                XmlDocument xmldoc = new XmlDocument();
                xmldoc.LoadXml(xmlFile);
                XmlNode xnroot = xmldoc.SelectSingleNode("comment");

                SinaComment s = SinaModelFactory.CreateComment(xnroot);
                s.user = SinaModelFactory.CreateUser(xnroot.SelectSingleNode("user"));
                s.status = SinaModelFactory.CreateStatus(xnroot.SelectSingleNode("status"));
                s.reply_comment = SinaModelFactory.CreateReply_comment(xnroot.SelectSingleNode("reply_comment"));
                s.reply_comment.user = SinaModelFactory.CreateUser(xnroot.SelectSingleNode("reply_comment").SelectSingleNode("user"));

                s.status.user = SinaModelFactory.CreateUser(xnroot.SelectSingleNode("status").SelectSingleNode("user"));
                s.status.retweeted_status = SinaModelFactory.CreateRetweeted_status(xnroot.SelectSingleNode("status").SelectSingleNode("user").SelectSingleNode("retweeted_status"));
                s.status.retweeted_status.user = SinaModelFactory.CreateUser(xnroot.SelectSingleNode("status").SelectSingleNode("user").SelectSingleNode("retweeted_status").SelectSingleNode("user"));

                s.user.status = SinaModelFactory.CreateStatus(xnroot.SelectSingleNode("user").SelectSingleNode("status"));
                s.user.status.retweeted_status = SinaModelFactory.CreateRetweeted_status(xnroot.SelectSingleNode("user").SelectSingleNode("status").SelectSingleNode("retweeted_status"));
                s.user.status.retweeted_status.user = SinaModelFactory.CreateUser(xnroot.SelectSingleNode("user").SelectSingleNode("status").SelectSingleNode("retweeted_status").SelectSingleNode("user"));

                this._comment = s;
            }
        }
        public static SinaComment CreateComment(XmlNode xnComment)
        {
            SinaComment s = null;

            if (xnComment != null)
            {
                s = new SinaComment();

                //                <created_at>Mon Dec 13 14:55:05 +0800 2010</created_at>
                s.created_at = xnComment.SelectSingleNode("created_at").InnerText;

                //<id>4288554507</id>
                s.id = Convert.ToInt64(xnComment.SelectSingleNode("id").InnerText);

                //<text>abcedf</text>
                s.text = xnComment.SelectSingleNode("text").InnerText;

                //s._thrumbnail_pic = xnComment.SelectSingleNode("thrumbnail_pic") != null ? xnComment.SelectSingleNode("thrumbnail_pic").InnerText : null;
                //s._original_pic = xnComment.SelectSingleNode("original_pic") != null ? xnComment.SelectSingleNode("original_pic").InnerText : null;
                //s._bmiddle_pic = xnComment.SelectSingleNode("bmiddle_pic") != null ? xnComment.SelectSingleNode("bmiddle_pic").InnerText : null;

            }
            return s;
        }