the BarManager component eats my exceptions

Stéphane,

I'm not sure we have any code to catch exceptions from command handlers however it is a good idea to catch exceptions that occur during keyboard shortcuts because the keyboard shortcut hook comes from Windows API, and if an exception bubbled up in one of those handlers then the app is never notified of the exception (through Application.ThreadException) and the app crashes without a way to prevent it. It's probably because we handle keys from a Windows message hook instead of via a Form, etc. I'm not sure there is anything we can do here. You would be better off handling your exception from within the command handler.