Let's say that I have a few applications in a folder (each application has subfolders where plugins can be located):
Some files in these applications have an Export-attribute applied, others don't. Now, I want to be able to load these plugins in some of these applications. Is there a proper way to let MEF search recursively in every subfolder of a specified folder?
No, you will need to recurse through the directories yourself creating a DirectoryCatalog for each. Then, combine all of the DirectoryCatalogs with an AggregateCatalog to create the container.