参考：

 

转换成秒：

using System;  using System.Collections.Generic;    class Sentence  {    static void Main()    {      long ticks0 = DateTime.Now.Ticks;      for (int i = 0; i < int.MaxValue; i++)      {        // ...      }      long ticks1 = DateTime.Now.Ticks;      double n = (ticks1 - ticks0) / 10000000.0;      Console.WriteLine("上面这段程序运行了{0}秒", n);    }  }