BookManagement.Web.Controllers.HomeController.DetailBook C# (CSharp) Method

        public ActionResult DetailBook(int bookId = 0)
        {
            ViewBag.LinkBook = "https://www.facebook.com/bui.h.hiep?bookId=" + bookId.ToString();
            Book book = db.Books.Where(b => b.Id == bookId).ToList()[0];

            // Count request of book
            book.NumRequest += 1;
            db.SaveChanges();

            return View(book);
        }