一个简单的重试方法TryMultiTime

public static void TryMultiTime(Action act, int tryTimes=3, int interval = 2000)
        {
            var i = 0;
            while (true)
            {
                try
                {
                    i++;
                    act();
                    break;
                }
                catch (Exception ex)
                {
                    if (i >= tryTimes)
                        throw new Exception("请求超时", ex);
                    System.Threading.Thread.Sleep(interval);
                }
            }
        }