static void AnonymousPurchase(ApplicationServices app, string item)
{
IPurchaseViewModel receipt = app.AnonymousPurchase(item);
PrintReceipt(receipt);
}
static void PrintReceipt(IPurchaseViewModel receipt)
{
Console.WriteLine(receipt.Render());
}
private static void Purchase(ApplicationServices app, string item)
{
IPurchaseViewModel receipt = app.Purchase(item);
PrintReceipt(receipt);
}