BookManager.Web.Controllers.AdminController.Books C# (CSharp) Метод

        public ActionResult Books(int? page)
        {
            int pageSize = 5;
            int pageIndex = 1;
            pageIndex = page.HasValue ? Convert.ToInt32(page) : 1;
            IPagedList<Book> books = db.Books.OrderByDescending(b => b.BookId).ToPagedList(pageIndex, pageSize);
            return View(books);
        }