public void UpdateSumCart(List <BLProduct> productsCart) { int[] productAmounts = (int[])Session["productAmount"]; int numOfProducts = BLProduct.SumArr(productAmounts); NumOfProducts.Text = "Num Of Products-" + numOfProducts; double totalPrice = BLProduct.TotalPrice(productsCart, productAmounts); TotalPrice.Text = "Total Price-" + totalPrice; }