public ActionResult Create(SellerViewModel seller)
 {
     if (ModelState.IsValid)
     {
         _ISeller.AddSeller(seller.sellerInfor);
         return(RedirectToAction("Index"));
     }
     ViewBag.CategoryID    = new SelectList(db.Categories, "CategoryName", "CategoryName");
     ViewBag.ProductTypeID = new SelectList(db.ProductTypes, "TypeName", "TypeName");
     return(View(seller));
 }