// Use this for initialization
void Start()
{
ConcreteSubject subject = new ConcreteSubject();
Observer observer = new ConcreteObserver();
subject.AddObserver(observer);
subject.State = "下雨";
subject.State = "下雪";
}
public static void Main(string[] args)
{
ConcreteSubject s = new ConcreteSubject();
s.AddObserver(new ConcreteObserver()
{
Name = "A"
});
s.AddObserver(new ConcreteObserver()
{
Name = "B"
});
s.AddObserver(new ConcreteObserver()
{
Name = "C"
});
s.SubjectState = "Where have all the flowers gone ?";
Console.ReadLine();
}
public ConcreteObserver(ConcreteSubject subject)
{
_subject = subject;
_subject.AddObserver(this);
}