public SoldBook(BookEdition book, DateTime dateOfSale, int amount, decimal totalPrice, Payment payment)
{
this.book = book ?? throw new ArgumentNullException(nameof(book));
this.dateOfSale = dateOfSale;
this.amount = amount;
this.totalPrice = totalPrice;
this.payment = payment;
}
public ReleasedBookEdition(BookEdition bookEdition, int amountOfBooks)
{
this.bookEdition = bookEdition ?? throw new ArgumentNullException(nameof(bookEdition));
this.amountOfBooks = amountOfBooks;
}