Stopwatch sw = new Stopwatch();
sw.Start();
//这里填写要执行的代码
sw.Stop();
Console.WriteLine("总运行时间：" + sw.Elapsed);
Console.WriteLine("测量实例得出的总运行时间（毫秒为单位）：" + sw.ElapsedMilliseconds);
Console.WriteLine("总运行时间(计时器刻度标识)：" + sw.ElapsedTicks);
Console.WriteLine("计时器是否运行：" + sw.IsRunning.ToString());
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