access child composition container in mef

Given a composition container that holds a nested composition container, how do I access the nested c开发者_如何学Container?

By default you cannot directly access the nested containers you passed to a container. However you could look at the Providers property which will list all the ExportProviders that are currently being used by a given CompositionContainer (CompositionContainer is just a special ExportProvider) and find the ones that are CompositionContainers.