public void Detach(IBankingOperationObserver bankingOperationObserver)
{
Debug.WriteLine("Detaching observer from Bank");
_bankingOperationObservers.Remove(bankingOperationObserver);
}
public void Attach(IBankingOperationObserver bankingOperationObserver)
{
Debug.WriteLine("Attaching observer to Bank");
_bankingOperationObservers.Add(bankingOperationObserver);
}
