public ActionResult Details(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Book book = db.Books.Find(id);
if (book == null)
{
return HttpNotFound();
}
book.Count++;
db.Entry(book).State = EntityState.Modified;
db.SaveChanges();
return View(book);
}