EventAggregator resubscribe for weakreference?

[stevensrf11]

Is there any easy way to get detection exactly when a weak reference subscription to an eventaggregator has been garbage collected?
I know one could subscribe for a strong reference, but I like to subscribe to a weak reference so garbage collection does not have to be worried about.

The weak reference is the life time of the class.
In a method setting a weak reference target to a local variable in the method will prevent the garbage collection for the life time of the method call.

Will setting a class variable to a weak reference target variable say in the constructor keep the weak reference target as a strong reference for the life of the class?
Is doing something like this a good or bad idea and why?

[dansiegel]

Not that I'm aware of. Kind of the point of the weak reference is that it can sneak out of the party when everyone stops interacting with it.