使用System.Timers时的c#任务取消

using System;
using System.Timers;

class Program
{
    static Timer timer;
    static bool isCancelled = false;

    static void Main(string[] args)
    {
        timer = new Timer(1000); // 设置时间间隔为1秒
        timer.Elapsed += OnTimedEvent;
        timer.AutoReset = true; // 设置为多次触发
        timer.Enabled = true;

        Console.WriteLine("Press 'C' to cancel the timer.");
        ConsoleKeyInfo keyInfo = Console.ReadKey();
        if (keyInfo.KeyChar == 'C')
        {
            isCancelled = true;
            timer.Stop(); // 停止定时器
            Console.WriteLine("Timer stopped.");
        }

        Console.ReadKey();
    }

    private static void OnTimedEvent(Object source, ElapsedEventArgs e)
    {
        if (isCancelled)
        {
            return;
        }

        Console.WriteLine("Timer ticked at {0}", e.SignalTime);
    }
}