问题
I can't find it!?
回答1:
ExportFactory<T> is not part of MEF for the desktop (yet - as of now, it's only released for Silverlight). It looks like it will be included in MEF 2.
In the meantime, Glenn Block posted a version of the Composition.Initialization assembly ported to MEF for desktop development, and placed it on his SkyDrive. Alternatively, you can use the Preview 1 release of MEF2, which includes this.
来源：https://stackoverflow.com/questions/3762075/where-did-the-exportfactoryt-from-desktop-mef-go