static void Main(string[] args)
{
Timer tm = new Timer(5000);
Listener1 ls1 = new Listener1(tm);
Listener2 ls2 = new Listener2(tm);
tm.SimulateCountdown();
ls1.Unregister(tm);
tm.SimulateCountdown();
Console.ReadKey(true);
}
public void Register(Timer tm)
{
tm.CountdownCompleted += Listener1Msg;
}
public void Unregister(Timer tm)
{
tm.CountdownCompleted -= Listener1Msg;
}
public Listener1(Timer tm)
{
tm.CountdownCompleted += Listener1Msg;
}