public class BookController : Controller
    {
        private readonly BookRepository _bookRepository = null;

        public BookController(BookRepository bookRepository)
        {
            _bookRepository = bookRepository;
        }
     public ViewResult AddNewBook(bool isSuccess=false, int bookId=0)
        {
            ViewBag.isSuccess = isSuccess;
            ViewBag.BookId = bookId;
            return View();
        }

        [HttpPost]
        public IActionResult AddNewBook(BookModel bookModel)
        {
            int id = _bookRepository.AddNewBook(bookModel);
            if (id > 0)
            {
                //return RedirectToAction("AddNewBook"); or 
                return RedirectToAction(nameof(AddNewBook), new { isSuccess = true , bookId = id});
            }
            return View();
        }
    }
---------------------------------------------------------------------------------------
  public class BookRepository
    {
        private readonly BookStoreContext _context = null;
        public BookRepository(BookStoreContext context)
        {
            _context = context;
        }
        public int AddNewBook(BookModel model)
        {
            var newBook = new Books()
            {
                Author = model.Author,
                CreatedOn = DateTime.UtcNow,
                Description = model.Description,
                Title = model.Title,
                TotalPages = model.TotalPages,
                UpdatedOn = DateTime.UtcNow
            };

            _context.Books.Add(newBook);
            _context.SaveChanges();
            return newBook.Id;
        }

--------------------------------------------------------------------------------

    public class BookStoreContext : DbContext
    {
        public BookStoreContext(DbContextOptions<BookStoreContext> options):base(options)
        {

        }

        public DbSet<Books> Books { get; set; }
     }
----------------------------------------------------------------------------
}
    public class BookModel
    {
        public int Id { get; set; }
        public string Title { get; set; }
        public string Author { get; set; }
        public string Description { get; set; }
        public string Category { get; set; }
        public string Language { get; set; }
        public int TotalPages { get; set; }
    }
---------------------------------------------------------------------------
    public class Books
    {
        public int Id { get; set; }
        public string Title { get; set; }
        public string Author { get; set; }
        public string Description { get; set; }
        public string Category { get; set; }
        public string Language { get; set; }
        public int TotalPages { get; set; }
        public DateTime? CreatedOn { get; set; }
        public DateTime? UpdatedOn { get; set; }


    }