static void Main()
{
int seconds = 5;
Timer test = new Timer(seconds); //starts the test timer and time measure
Listener listener = new Listener(); //make an instance of class Listner in order to subscribe for the event TimeElapsed from class Timer
Console.WriteLine("You have to press Ctrl + C to stop the program.");
listener.Subscribe(test); //when the event "time elapsed" happens the method PrintTimeNow() will be invoked because it is added to the event TimeElapsed
test.Run(); //this method checks every n seconds and invokes the event
}
public void Subscribe(Timer timer)
{
timer.TimeElapsed += PrintTimeNow; //connects method PrintTimeNow() with the event TimeElapsed from class Timer
}