public async Task<IActionResult> Create([Bind("Id,Name")] Department department)
 {
     if (ModelState.IsValid)
     {
         _context.Add(department);
         await _context.SaveChangesAsync();
         return RedirectToAction(nameof(Index));
     }
     return View(department);
 }
 public void Insert(Seller seller)
 {
     _context.Add(seller);
     _context.SaveChanges();
 }