I'm adding a new screen to an app that's been working for a year or so. I thought I duplicated the same pattern in the new screen, but obviously I'm missing some detail.

The grid's bound to a BindingList<T>.

When I enter fields into the "add new" row and hit ENTER, the row disappears. It's not added to the collection. It seems that this is past the point that 99% of the problems here deal with: I have the "add new" row. I have a parameterless constructor. Each time I start to enter data into the new row, that constructor is called, so it's creating the new object.

Note that the grid does initially display the contents of the BL<> . It does not, however, add the new object to it.

Have you seen this before?

Thank you.