Culture of the product (Chinese, American, etc.)
 public ActionResult Create(ProductType producttype)
 {
     if (ModelState.IsValid) {
         producttypeRepository.InsertOrUpdate(producttype);
         producttypeRepository.Save();
         return RedirectToAction("Index");
     } else {
         return View();
     }
 }
 public void InsertOrUpdate(ProductType producttype)
 {
     if (producttype.Id == default(System.Guid)) {
         // New entity
         producttype.Id = Guid.NewGuid();
         context.ProductTypes.Add(producttype);
     } else {
         // Existing entity
         context.Entry(producttype).State = EntityState.Modified;
     }
 }