在.NET中，使用StopWatch类(中文为秒表，非常形象）可以很方便的统计执行时间，示例如下：

using System;using System.Diagnostics;using System.Threading;class Program{    static void Main(string[] args)    {        Stopwatch stopWatch = new Stopwatch();        stopWatch.Start();        Thread.Sleep(10000);        stopWatch.Stop();        // Get the elapsed time as a TimeSpan value.        TimeSpan ts = stopWatch.Elapsed;        // Format and display the TimeSpan value.         string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",            ts.Hours, ts.Minutes, ts.Seconds,            ts.Milliseconds / 10);        Console.WriteLine("RunTime " + elapsedTime);    }}

需要更详细的介绍请参考:http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch(v=vs.110).aspx

.Net统计代码执行时间