Stopwatch sw = new Stopwatch();  
    sw.Start();  
    //这里填写要执行的代码  
    sw.Stop();  
    Console.WriteLine("总运行时间：" + sw.Elapsed);  
    Console.WriteLine("测量实例得出的总运行时间（毫秒为单位）：" + sw.ElapsedMilliseconds);  
    Console.WriteLine("总运行时间(计时器刻度标识)：" + sw.ElapsedTicks);  
    Console.WriteLine("计时器是否运行：" + sw.IsRunning.ToString());