// "Observer"
interface IInvestor
{
void Update(Stock stock);
}
// "ConcreteObserver"
class Investor : IInvestor
{
private string name;
private Stock stock;
// Constructor
public Investor(string name)
{
this.name = name;
}
public void Update(Stock stock)
{
Console.WriteLine("Notified {0} of {1}'s " +
"change to {2:C}", name, stock.Symbol, stock.Price);
}
// Property
public Stock Stock
{
get { return stock; }
set { stock = value; }
}
}
