static void Main(string[] args)
{
Bulb b1 = new Bulb();
Bulb b2 = new Bulb();
Person p = new Person();
// observer
b1.RegisterObserver(p);
b2.RegisterObserver(p);
// del[]
b1.RegisterDelegate(p.FF);
b2.RegisterDelegate(p.FF);
// event
b1.OnFire += p.FF;
b2.OnFire += p.FF;
b1.Fire();
Console.ReadLine();
}
public void FF(Bulb sender)
{
Console.WriteLine("Person: FF");
}
public void OnFire(Bulb sender)
{
Console.WriteLine("Person: on fire");
}