public IActionResult Index()
{
var products = this.HttpContext.Session.Get <List <Product> >("cart");
if (products == null)
{
products = new List <Product>();
}
this.ViewData["ProductsCount"] = products.Count;
this.TotalPrice = products.Select(x => x.Price).Sum();
this.ViewData["TotalPrice"] = this.TotalPrice;
return(View(cartProductService.ConvertForShoppingCart(products)));
}