You might find the Contains method in the EventBase
class (from which the CompositePresentationEvent class inherits) useful, as it allows you to determine whether an event contains a certain subscription. The way to determine that is to provide a subscription token, which is an identifier of
the subscription. The token is returned when you call the Subscribe
method of a CompositePresentationEvent.
You can find more information about this in the
CompositePresentationEvent section of the Communication Chapter in the Prism MSDN documentation.
I hope you find this helpful.
Guido Leandro Maliandi