private void FixupTrack(Track previousValue)
{
if (previousValue != null && previousValue.InvoiceLines.Contains(this))
{
previousValue.InvoiceLines.Remove(this);
}
if (Track != null)
{
if (!Track.InvoiceLines.Contains(this))
{
Track.InvoiceLines.Add(this);
}
if (TrackId != Track.TrackId)
{
TrackId = Track.TrackId;
}
}
}
