C# (CSharp) ISalePaymentService примеры использования

Пример #1

        public frmDailySales(ISalesService salesService, ISalePaymentService salePaymentService)
        {
            InitializeComponent();

            _salesService       = salesService;
            _salePaymentService = salePaymentService;
        }

Пример #2

 public frmPointOfSalePayment(ISalePaymentService posPaymentService, ISaleService pOSTransactionService, int transactionID, DateTime saleDate)
 {
     InitializeComponent();
     _posPaymentService     = posPaymentService;
     _pOSTransactionService = pOSTransactionService;
     _posTransactionID      = transactionID;
     _saleDate = saleDate;
 }