How to enumerate assemblies within AggregateCatalog or DirectoryCatalog in MEF?
I have a MEF (Microsoft Extension Framework) application which loads some assemblies from a folder. I need to enumerate the assemblies that produced any exports for my application. 

One way to do it is to enumerate imports calling `GetExportedObject().GetType().Assembly`. But it would be cleaner to do this without instantiation of imports. Is there a way to get loaded assemblies from a catalog or anything else?
How to enumerate assemblies within AggregateCatalog or DirectoryCatalog in MEF?
===

I have a MEF (Microsoft Extension Framework) application which loads some assemblies from a folder. I need to enumerate the assemblies that produced any exports for my application. 

One way to do it is to enumerate imports calling `GetExportedObject().GetType().Assembly`. But it would be cleaner to do this without instantiation of imports. Is there a way to get loaded assemblies from a catalog or anything else?