public IActionResult Get() { var receipt = new Receipt(); receipt.AddCustomerNumber("123"); receipt.AddItem(new Item("Milk", new Amount(CurrencyEnum.EUR, 10.0f))); receipt.AddItem(new Item("Egs", new Amount(CurrencyEnum.EUR, 5.0f))); receipt.AddItem(new Item("Honey", new Amount(CurrencyEnum.EUR, 2.0f))); return(Ok(receipt.ToJson())); }