public void Do()
{
ConcreteSubject subject = new ConcreteSubject("0.10");
subject.Attach(new ConcreteObserver("X"));
subject.State = "state1";
subject.Price = "0.01";
Console.ReadLine();
}
public ConcreteObserver(ConcreteSubject subject)
{
this._subject = subject;
}
public ConcreteObserver(string observerId, ISubject subject)
{
ObserverId = observerId;
Subject = (ConcreteSubject)subject;
}