Yeah, I think your calling is a problem
– some tracing might help but not always
— when I’m in doubt (and not using VS) I can use the wizard(s) to add all the events I can think of to my form customization, and then add messageboxes to events so I can see what is happening, when as I navigate in the form. Kind of tedious to set up (if you’re not OCD) but I have found them to be enlightening.
Finally… I think this is the correct link to that thread:
Efficiently Adding Column to DataGrid