public ActionResult Create(ProductCategoryManageCreateViewModel model)
        {
            if (ModelState.IsValid)
            {
                var productCategory = new ProductCategory
                {
                    Name = model.Name,
                    Description = model.Description,
                    UrlSlug = model.UrlSlug
                };
                db.ProductCategories.Add(productCategory);
                db.SaveChanges();

                return RedirectToAction("Index");
            }

            return View(model);
        }
        public ActionResult Edit(ProductCategoryManageEditViewModel model)
        {
            if (ModelState.IsValid)
            {
                var productCategory = new ProductCategory
                {
                    Id = model.Id,
                    Name = model.Name,
                    Description = model.Description,
                    UrlSlug = model.UrlSlug
                };

                db.Entry(productCategory).State = EntityState.Modified;
                db.SaveChanges();
                return RedirectToAction("Index");
            }
            return View(model);
        }