private bool IsProvidedParkingTicket(ParkingTicket parkingTicket) { return(this.providedParkingTickets.ContainsKey(parkingTicket.GetParkingTime())); }
protected void UpdateProvidedParkingTicket(ParkingTicket parkingTicket) { this.providedParkingTickets.TryAdd(parkingTicket.GetParkingTime(), parkingTicket); }