using System;

using System.Timers;

namespace ConsoleApp

{

public class Clock

{

private Timer timer;

private int hour;

private int minute;

private int second;

public Clock()

{

timer = new Timer(1000);

timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);

}

public void Start()

{

timer.Start();

}

public void Stop()

{

timer.Stop();

}

void timer_Elapsed(object sender, ElapsedEventArgs e)

{

DateTime time = e.SignalTime;

hour = time.Hour;

minute = time.Minute;

second = time.Second;

string display = string.Format("{0}:{1}:{2}",

hour, minute, second);

Console.Clear();

Console.WriteLine(display);

}

}

}

Main函數里寫new Clock().Start();

即可。