.net中的两种计时方法

    //秒表方法一:            Stopwatch sw = new Stopwatch();            sw.Start();            for (int i = 0; i < 10000; i++)            {            }            sw.Stop();            MessageBox.Show(sw.Elapsed.TotalMilliseconds.ToString());            //当前时间减去开始时间方法二:            DateTime begintime = DateTime.Now;            for (int i = 0; i < 10000; i++)            {            }            TimeSpan ts = DateTime.Now.Subtract(begintime);            MessageBox.Show(ts.TotalMilliseconds.ToString());