private void Start_Click(object sender, EventArgs e)
{
int minutes = (int)numericUpDown1.Value;
int secundes = (int)numericUpDown2.Value;
countdownTimer = new CountdownTimer(new TimeSpan(0,0, minutes, secundes, 0));
countdownTimer.Start(timer1);
Text = "Start";
}
// Listener unregister itself so that it no longer receives notifications
public void Unregister(CountdownTimer timer)
{
timer.CountdownEvent -= Listen;
}
// Pass the CountdownTimer object to the constructor
public Listener(CountdownTimer timer)
{
timer.CountdownEvent += Listen;
}