CommandManager.InvalidateRequerySuggested() isn't fast enough. What can I do?

Question

Short Version

Calls to CommandManager.InvalidateRequerySuggested() take far longer to take effect than I would like (1-2 second delay

Answer 1

Just to clarify:

1. You want to fire an update of CanExecute when Command property changed
2. Create your own binding class that detect changes in the Command property and then calls RaiseCanExecuteChanged()
3. Use this binding in CommandParameter

Worked for me.