public BusinessLogic_Documents()
        {
            container = DI_Container.Config();

            receiptProcessor = container.Resolve <IReceiptProcessor>();
            invoiceProcessor = container.Resolve <IInvoiceProcessor>();
            vendor           = container.Resolve <IVendor>();
            buyer            = container.Resolve <IBuyer>();
            invoice          = container.Resolve <IInvoice>();
        }