System.Threading.Timer

GLog.WLog("_thdTimer before");
                _thdTimer = new System.Threading.Timer(new TimerCallback(TimerProc));
                //2秒后开始执行计时器；每3秒执行一次
                _thdTimer.Change(2000,3000);
                GLog.WLog("_thdTimer after");

private void TimerProc(object state)
        {
            try
            {
                GLog.WLog("threading timer tick");
            }
            catch (Exception ex)
            { }
        }