C#程序执行时间

Stopwatch类 using System.Diagnostics;

      static void Main(string[] args)
        {
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            Thread.Sleep();
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",
                ts.Hours, ts.Minutes, ts.Seconds,
                ts.Milliseconds / );
            Console.WriteLine("RunTime " + elapsedTime);
            Console.ReadKey();
        }