public IActionResult Index()
        {
            List <Product> prodcuts = productService.GetChippestProduct();
            var            tmp      = productService.GetChippestProduct();

            if (prodcuts.Count <= 3)
            {
                var All_Products = productService.GetProducts();
                if (All_Products.Count < 4)
                {
                    foreach (var item in tmp)
                    {
                        prodcuts.Remove(item);
                    }
                    foreach (var item in All_Products)
                    {
                        prodcuts.Add(item);
                    }
                }
            }

            SessionManager sessionManager = new SessionManager(httpContextAccessor);

            if (User.Identity.IsAuthenticated)
            {
                var session = sessionManager.GetLogInfo();
                if (string.IsNullOrEmpty(session) || session != User.Identity.Name)
                {
                    sessionManager.SetLogInfo(User.Identity.Name);
                }
                ViewBag.name = sessionManager.GetLogInfo();
            }
            return(View(prodcuts));
        }
        public IActionResult Index()
        {
            List <Product> prodcuts = productService.GetChippestProduct();

            return(View(prodcuts));
        }