public string getAccessToken()
        {
            string accessToken = string.Empty;
            string url         = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=" + appid + "&corpsecret=" + appsecret + "";

            try
            {
                AccessToken     AT       = new AccessToken();
                HttpWebResponse response = new HttpWebResponseUtility().CreateGetHttpResponse(url, 10000, null, null);
                StreamReader    reader   = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                string          str      = reader.ReadToEnd();
                AT = ParseFromJson <AccessToken>(str);
                reader.Dispose();
                reader.Close();
                if (response != null)
                {
                    response.Close();
                }
                if (AT != null)
                {
                    accessToken = AT.access_token;
                }
            }
            catch
            {
            }
            return(accessToken);
        }
        /// <summary>
        /// POST方式请求 微信返回信息
        /// </summary>
        /// <param name="parameters">参数</param>
        /// <param name="URL">请求地址</param>
        /// <returns>返回字符</returns>
        public string PostForWeiXin(StringBuilder parameters, string URL)
        {
            string access_token = getAccessToken();
            string url          = URL + "access_token=" + access_token;

            HttpWebResponse response = new HttpWebResponseUtility().WXCreateGetHttpResponse(url, parameters, 10000, null, Encoding.UTF8, null);
            StreamReader    reader   = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
            string          str      = reader.ReadToEnd();

            WriteLog(url + "----------------" + parameters + "---------------" + str);
            return(str);
        }