DGV RowsAdded and accessing the DataGridViewRow.DataBoundItem property = me killing myself!

[sklett]

<sigh....OK, here we go:

I have a databound DGV using a binding source. There are some columns in
the DGV which are NOT data bound. When I programatically add a new item to
my collection that is bound to the DGV the DGV.RowsAdded() events fires. In
this event I access the [new] DataGridViewRow via the RowIndex property of
the event args.

I'm getting an exception throw by the DataBoundItem property. it's a
KeyNotFoundException.

I've googled KeyNotFoundException and DataBoundItem and there are zero
results (Impressive!)

I have no idea what's happening. I wanted to ask here to see if anyone has
encountered something like this before OR... if someone can clue me in that
what I'm trying to do is bound (pun intended) to cause problems. I'm not a
DGV pro, so I'm quite lost (and frustrated) at this point.

Oh.. and if I try to go ahead and work with the DataBoundItem property in a
try/catch the exception is never actually throw. That is execution never
moves to the catch block, VS2k5 just stops doing anything. It's not hung,
but it's not running either. The way that I can see that in fact
DataBoundItem is throwing this exception is from inspecting it in the watch
window.

Hopefully someone will have some ideas for me... this is a weird one.

Thanks for reading,
Steve