public string GetOrderSummary()
{
var cart = new Cart(CartLines);
var summary = new StringBuilder("Nowe zamówienie").AppendLine(SummaryDelimiter).AppendLine("Produkty: ");
cart.Items.ToList().ForEach(
line => summary.AppendLine(
$"{line.Quantity} x {line.Product.Price} (wartość: {line.GetSubtotal():C})"));
summary.AppendLine($"Wartość całkowita: {cart.ComputeTotal():C}")
.AppendLine(SummaryDelimiter)
.AppendLine("Wysyłka dla: ")
.AppendLine(ClientName)
.AppendLine(Address.Line1)
.AppendLine(Address.Line2 ?? string.Empty)
.AppendLine(Address.Line3 ?? string.Empty)
.AppendLine(Address.City)
.AppendLine(Address.State)
.AppendLine(Address.Country)
.AppendLine(Address.Zip)
.AppendLine(SummaryDelimiter)
.AppendLine($"Pakowanie prezentów: {(GiftWrap ? "Tak" : "Nie")}");
return(summary.ToString());
}