How do I stop a class from running

Hi All,
I have a class that creates a timer and raises an event event when the timer tick event occurs (See Code Snippet) I can create an instance of my timer class like this:

private TimerClass MyTimer;

private void button1_Click(object sender, EventArgs e)
{
    //Create timer with 1 second interval.
    MyTimer = new TimerClass(1000);
    ((TimerClass)MyTimer).TimerEvent += new TimerEventDelegate(Form1_TimerEvent);
}

and it happily ticks away. However I want to destroy the instance of my class and recreate it with a different constructor initialiser like this:

private void button2_Click(object sender, EventArgs e)
{
    //Create timer with 5 second interval
    MyTimer = new TimerClass(5000);
    ((TimerClass)MyTimer).TimerEvent += new TimerEventDelegate(Form1_TimerEvent);
}

I thought this would delete the first instance of MyTimer and a new instance would start. Instead I end up with 2 timers running. How do I delete the first instance of my TimerClass before creating a new one?Start Free Trial

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public class TimerClass : Timer
    {
        public event TimerEventDelegate TimerEvent;
 
        Timer ClassTimer = new Timer();
 
        public TimerClass(int TimerInterval)
        {
            ClassTimer.Interval = TimerInterval;
            ClassTimer.Tick += new EventHandler(FirstTimer_Tick);
            ClassTimer.Enabled = true;
        }
 
        void FirstTimer_Tick(object sender, EventArgs e)
        {
            OnTimerEvent(new EventArgs());
        }
 
        public virtual void OnTimerEvent(EventArgs Args)
        {
            TimerEvent(this, DateTime.Now.ToLongTimeString() + " " + ClassTimer.Interval.ToString());
        }
    }