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;
}
}
}
