带计时器的C#控制台基本用户界面

using System;
using System.Threading;

class TimerApp
{
    static void Main()
    {
        Timer timer = new Timer(UpdateTime, null, 0, 1000);
        bool running = true;

        Console.WriteLine("按下 'S' 启动计时器，'P' 停止计时器，'R' 重置计时器，'Q' 退出程序");

        while (running)
        {
            var key = Console.ReadKey().KeyChar;
            switch (key)
            {
                case 'S':
                    timer.Change(0, 1000);
                    break;
                case 'P':
                    timer.Change(-1, -1);
                    break;
                case 'R':
                    Console.WriteLine("\r\n计时器已重置");
                    break;
                case 'Q':
                    running = false;
                    break;
            }
        }

        timer.Dispose();
    }

    static void UpdateTime(object state)
    {
        Console.SetCursorPosition(0, Console.CursorTop);
        Console.Write($"当前时间: {DateTime.Now.ToString("HH:mm:ss")}");
    }
}