New Post: evaluating action guards in caliburn micro

Do I have to notify property changed in every function/property in view model for updating tool-bar's button status according to caliburn micro? That doesn't sound good.

Can I have my reflective command back ? or I missed something?

public void New()
 {
    // do something
    NotifyOfPropertyChange(() => CanFirst);
    NotifyOfPropertyChange(() => CanLast);
    NotifyOfPropertyChange(() => CanPrevious);
    NotifyOfPropertyChange(() => CanNext);
    NotifyOfPropertyChange(() => CanNew);
    NotifyOfPropertyChange(() => CanUpdate);
    NotifyOfPropertyChange(() => CanDelete);
    NotifyOfPropertyChange(() => CanSave);
    NotifyOfPropertyChange(() => CanActive);
    .
    .
    .
 }