Could it be erroring out because of the custom columns you are trying to add to it?<BR><BR>I don't know the answer off the top of my head, but you could do something as simple as DataGridView1 = new ...

I'm trying to have two related tables appear in one datagridview with the ability to update/insert/delete. Here is a simplified version of what the table structure looks like:<BR><BR>Table1: Table1_ID ...