//GET Edit
        public async Task <IActionResult> Edit(int id)
        {
            BookCoreMVC = await _db.BooksCoreMVC.FindAsync(id);

            if (BookCoreMVC == null)
            {
                return(NotFound());
            }

            return(View(BookCoreMVC));
        }
        public async Task <IActionResult> Delete(int id)
        {
            BookCoreMVC = await _db.BooksCoreMVC.FindAsync(id);

            if (BookCoreMVC == null)
            {
                return(NotFound());
            }

            _db.BooksCoreMVC.Remove(BookCoreMVC);
            await _db.SaveChangesAsync();

            return(RedirectToAction(nameof(Index)));
        }