计算代码运行时间：

using System;
using System.Diagnostics;
namespace 计算代码运行时间
{
    class Program
    {
        static void Main(string[] args)
        {
            Stopwatch during = new Stopwatch();
            during.Start();
            //需要计算运行时间的代码
            during.Stop();
            Console.WriteLine("代码运行耗时：{0}",during.Elapsed);
            during.Reset();//清零
            Console.ReadKey();
        }
    }
}