public IGumballMachineState TurnLever() { Console.WriteLine("Purchase successful."); return(NoCoinState.GetInstance()); }
public static IGumballMachineState GetInstance() { return(_instance ?? (_instance = new NoCoinState())); }
public IGumballMachineState EjectCoin() { Console.WriteLine("Coin ejected."); return(NoCoinState.GetInstance()); }