namespace LDBproject.Entities; public class Order { public int OrderID { get; private set; } public int CardID { get; private set; } public int LibrarianID { get; private set; } public DateTime BorrowDate { get; private set; } public IEnumerable Registrations { get; set; } = []; public static Order NewOrder( int orderIndex, int ticketIndex, int librarian, IEnumerable list, DateTime borrow) { return new Order { OrderID = orderIndex, CardID = ticketIndex, LibrarianID = librarian, Registrations = list, BorrowDate = borrow }; } }