static void Main()
{
// setup the metronome and make sure the EventHandler delegate is ready
Metronome metronome = new Metronome();
// wires up the metronome_Tick method to the EventHandler delegate
Listener listener = new Listener(metronome);
ListenerB listenerB = new ListenerB(metronome);
metronome.Go();
}
public void Change(Listener listener)
{
listener = new ListenerB();
}
