public void RemoveRental(SingleRental rental)
{
Debug.Assert(rental != null);
var removed = _rentals.Remove(rental);
if (!removed)
{
throw new RentalException("Rental not found");
}
}
public void AddRental(SingleRental rental)
{
Debug.Assert(rental != null);
if (_rentals.Count == MaxRentals)
{
throw new RentalException("Max number of rentals reached");
}
if (_rentals.Contains(rental))
{
throw new RentalException("Rental has already been added");
}
_rentals.Add(rental);
}
