public ActionResult Edit(int id) { Product product = _productBusiness.GetById(id); if (product == null) { return(HttpNotFound()); } ViewBag.SelectedCategory = product.ProductCategories.ToList(); var tagsList = _tagBusiness.GetByProductId(id).Select(t => t.TagName); ViewBag.Tags = string.Join(",", tagsList); ViewBag.Categories = _categoryBusiness.Get(); return(View(product)); }