public void Connect()
        {
            try
            {
                cn = new MySqlConnection();
                cn.ConnectionString = ConnectionString;
                cn.Open();                 
            }
 
            catch (Exception exp)
            {
                System.Windows.Forms.MessageBox.Show("Ошибка соединения с MySQL\n" + exp.Message + "Текст ошибки в отчете - exception.log\n");               
 
                StreamWriter exception = new StreamWriter(Application.StartupPath + @"\exception.log", true, Encoding.Default);
                exception.Write(DateTime.Now.ToString("dd.MM.yyyy hh:mm:ss  ") + Convert.ToString(exp) + "\r\n");
                exception.Close();
                Application.Exit(); 
            }
        }

bool WriteException = false;

 for (int i = 0; i < 3; i++)
            {
 
                if (MycSQL.Connect(WriteException))
                {
                    break;
                }
                if (i == 3)
                {
                    WriteException = true;
                    MycSQL.Connect(WriteException);                 
                }
                System.Threading.Thread.Sleep(10000);
            }

 public bool Connect(bool WriteException)
        {
            bool success = false;
 
            try
            {
                cn = new MySqlConnection();
                cn.ConnectionString = ConnectionString;
                cn.Open();
                success = true; 
            }
 
 
            catch (Exception exp)
            {
                //System.Windows.Forms.MessageBox.Show("Ошибка соединения с MySQL\n" + exp.Message + "Текст ошибки в отчете - exception.log\n");               
                if (WriteException)
                {
                    StreamWriter exception = new StreamWriter(Application.StartupPath + @"\" + DateTime.Now.ToString("dd.MM.yyyy_hh.mm.ss_") + "exception " + SystemInformation.UserName + ".log", true, Encoding.Default);
                    exception.Write(DateTime.Now.ToString("dd.MM.yyyy hh:mm:ss  ") + Convert.ToString(exp) + "\r\n");
                    exception.Close();
                    Application.Exit();
                }
            }
 
 
            return success;
        }

  for (int i = 0; i < 4; i++)
            {
 
                if (MycSQL.Connect(WriteException))
                {
                    break;
                }
                if (i == 3)
                {
                    WriteException = true;
                    MycSQL.Connect(WriteException);
                    Application.Exit();
                }
                System.Threading.Thread.Sleep(10000);
            }