Ferdinand,

   Events can be fired for any reason whatsoever.  It is up to the defining
class to indicate when events should be fired.

   There is nothing that says you can't fire an event if a property changes
it's value.

   If you want to do this, you should look into the INotifyPropertyChanged
interface, as it defines a standard event that is used to indicate when a
property changes.

   Hope this helps.