public void ResetButton(int currentFloor, ElevatorState status)
        {
            switch (status)
            {
            case ElevatorState.GoingDown:
                ButtonPressed.Where(command => command.Floor == currentFloor)
                .Where(command => command.Direction == Direction.Down).ToList <Command>().ForEach(command => ButtonPressed.Remove(command));
                break;

            case ElevatorState.GoingUp:
                ButtonPressed.Where(command => command.Floor == currentFloor)
                .Where(command => command.Direction == Direction.Up).ToList <Command>().ForEach(command => ButtonPressed.Remove(command));
                break;

            case ElevatorState.Waiting:
                ResetButton(currentFloor, ElevatorState.GoingUp);
                ResetButton(currentFloor, ElevatorState.GoingDown);
                break;
            }
        }