private void _pictureBoxCaptcha_Click(object sender, EventArgs e)
 {
     try
     {
         var responseData =
             ClassHttp.HttpGet(FormMain.SelectCourseCaptchaUrl, FormMain.UrpIp, FormMain.SelectUrl,
                               "application/json, text/plain, */*",
                               _token, _userAgent).Replace("\"", "").Trim();
         _pictureBoxCaptcha.Load(FormMain.ImgUrl + responseData + "." + _type);
     }
     catch (Exception ex)
     {
     }
 }
        public static string GetNetWorkTime()
        {
            try
            {
                foreach (var str in TimeHttpList)
                {
                    var input = ClassHttp.HttpGet(str, null, null, "text/plain, */*", null, null);
                    var match = new Regex(@"(?<timestamp>\d{13})").Match(input);
                    if (match.Success)
                    {
                        return(match.Groups["timestamp"].Value);
                    }
                }
            }
            catch (Exception)
            {
                var span = DateTime.Now - StartTime;
                return(Convert.ToInt64(span.TotalMilliseconds).ToString());
            }
            var span2 = DateTime.Now - StartTime;

            return(Convert.ToInt64(span2.TotalMilliseconds).ToString());
        }