public CheckoutBuilder AddProducts(IEnumerable <SaleProduct> products) { if (CheckoutProducts == null) { CheckoutProducts = new List <SaleProduct>(products); return(this); } CheckoutProducts.AddRange(products); return(this); }
private double CheckoutValue() { CheckoutTotalValue = 0; CheckoutProducts.ForEach(P => CheckoutTotalValue += P.Unit_Value * P.Qnt); return(CheckoutTotalValue); }