Environment.TickCount与DateTime.Now

使用秒表类。msdn上有一个不错的示例：http : //msdn.microsoft.com/zh-
cn/library/system.diagnostics.stopwatch.aspx

    Stopwatch stopWatch = Stopwatch.StartNew();    Thread.Sleep(10000);    stopWatch.Stop();    // Get the elapsed time as a TimeSpan value.    TimeSpan ts = stopWatch.Elapsed;