DataGridView doesn't refresh when DataTable rows are changed

[Dagan]

Hello

I have 2 threads, one for adding\removing rows to\from DataTable that is
bind to DataGridView and the main thread that views the DataGridView, when I
change any row in the DataTable the DataGridView display doesn't refreshed,
if I make the change in the DataTable from the main thread, any change in
the DataTable is displayed immediately in the Grid, What is the cause of it
and how can it be resolved?

Thanks.