先引用Diagnostics
using System.Diagnostics;
然后:
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
中间放要测试的代码
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 / 10);
Debug.WriteLine("RunTime " + elapsedTime);
打出的运行时间: 13秒08
RunTime 00:00:13.08
参考: Stopwatch 类
http://msdn.microsoft.com/zh-cn/library/system.diagnostics.stopwatch.aspx