public ConcreteObserver(
ConcreteSubject subject, string name)
{
this._subject = subject;
this._name = name;
}
private void btnObsever_Click(object sender, EventArgs e)
{
ConcreteSubject s = new ConcreteSubject();
s.Attach(new ConcreteObserver(s, "X"));
s.Attach(new ConcreteObserver(s, "Y"));
s.Attach(new ConcreteObserver(s, "Z"));
s.SubjectState = "ABC";
s.Notify();
//IBM ibm = new IBM("IBM", 120.00);
//ibm.Attach(new Investor("Sorros"));
//ibm.Attach(new Investor("Berkshire"));
//// Fluctuating prices will notify investors
//ibm.Price = 120.10;
//ibm.Price = 121.00;
// Wait for user
}