Chinook.Model.InvoiceLine.FixupInvoice C# (CSharp) Метод

        private void FixupInvoice(Invoice previousValue)
        {
            if (previousValue != null && previousValue.InvoiceLines.Contains(this))
            {
                previousValue.InvoiceLines.Remove(this);
            }
    
            if (Invoice != null)
            {
                if (!Invoice.InvoiceLines.Contains(this))
                {
                    Invoice.InvoiceLines.Add(this);
                }
                if (InvoiceId != Invoice.InvoiceId)
                {
                    InvoiceId = Invoice.InvoiceId;
                }
            }
        }