using System;
using System.Timers;

namespace TestTimer
{
    internal class Program
    {
        private static int usingResource = 0;
        static int m = 0;
        static Timer timerTask = new Timer();
        static Timer timerMonitor = new Timer();

        static void Main(string[] args)
        {
            //任务 定时器
            timerTask.AutoReset = true;
            timerTask.Interval = 1 * 1000;//1秒触发一次
            timerTask.Enabled = true;
            timerTask.Elapsed += TimerTask_Elapsed;
            timerTask.Start();
            //监控 定时器
            timerMonitor.AutoReset = true;
            timerMonitor.Interval = 1 * 1000;//1秒触发一次
            timerMonitor.Enabled = true;
            timerMonitor.Elapsed += TimerMonitor_Elapsed; ;
            timerMonitor.Start();
            
            Console.Read();
        }

        private static void TimerMonitor_Elapsed(object sender, ElapsedEventArgs e)
        {
            Console.WriteLine("m={0}", m);
            if (m == 1)
            {
                Console.WriteLine("set task stop");
                timerTask.Stop();
            }
        }

        private static void TimerTask_Elapsed(object sender, ElapsedEventArgs e)
        {
            if (0 == System.Threading.Interlocked.Exchange(ref usingResource, 1))
            {
                m = new Random().Next(0, 2);//m只可能为0或1
                if (m == 0)
                    Console.WriteLine("m=0 => {0:HH:mm:ss}", DateTime.Now);
                else
                {
                    for (int i = 0; i < 999999999; i++)
                    {
                        Console.WriteLine("m=1 => {0:HH:mm:ss}", DateTime.Now);
                        System.Threading.Thread.Sleep(1000);
                    }
                }
                System.Threading.Interlocked.Exchange(ref usingResource, 0);
            }
            else
            {
                Console.WriteLine("{0:yyyy-MM-dd HH:mm:ss}, 未取得锁，已退出", DateTime.Now);
            }
        }
    }
}

由上面代码可以得到下面的结果：

没有停止。

有空想其它办法，能中止了写后续