public bool IsBeiJingIPAddress()        {            string clientIP = GetClientIP();            string val = CS.Utility.Strfunc.GetHtml(string.Format("http://www.youdao.com/smartresult-xml/search.s?type=ip&q={0}", clientIP));            val = val.Replace("\0", "");            CS.Utility.Log.LogHelper.Log.WriteLog("youdao:" + val);            if (string.IsNullOrEmpty(val))            {                val = CS.Utility.Strfunc.GetHtml(string.Format("http://www.ip138.com/ips1388.asp?ip={0}&action=2", clientIP));                val = val.Replace("\0", "");                CS.Utility.Log.LogHelper.Log.WriteLog("ip138:" + val);            }            if (string.IsNullOrEmpty(val))            {                val = CS.Utility.Strfunc.GetHtml(string.Format("http://api.liqwei.com/location/?ip={0}", clientIP));                val = val.Replace("\0", "");                CS.Utility.Log.LogHelper.Log.WriteLog("liqwei:" + val);            }            if (val.Contains("北京"))            {                return true;            }            else            {                return false;            }        }