c# - Loading plugins at runtime with MEF -

My application allows users to write runtime (Implementing IPlugin) that they can institute on runtime There is a directory of plugins at startup. Dlls are parsed, entering all available plug-in notifications. At runtime a GUI is provided that makes users an example of any plugin. It works fine

But now I am looking at MEF and hope that I can do this, but in a more beautiful way codewise

I now I'm working with MEF : On startup, I am importing all the plugins in a directory (Export IPLGen) and read information such as Name, Category, Author, etc ... Export for these plugin sections Metadata are encoded as attributes to import Is the Serous, so not Instityueted all plugins at startup, which is important.

The problem is that now I do not see any way to choose beautifully to choose from. At the runtime, the plugin provides additional complexity that the plugins manufacturer is an importer constructor Importing the context of an IPluginHost (which is necessary to do something initially)

With a plugininfone I save the related export in a dictionary during startup, so when a GUI asks to request the plugin to give a specific plugin plugin, I have export (where Export is .value is my actual ipeligin). But how can I make an example of the plugin from there and what is written with the IPL taginhost?

I have collected, I would like to write my own export provider which whenever I ask for it, but I can not use the IPluginHost assembly or specific plug-in that gives me a catalog , Add catalog and export provider to container and call. Compass ports on that container

I hope I have clarified my problem, if not, then I should try to make a short version of a question: this is a standard There is a program for MEF that does not have the lazy available plugins loads the plug-in at startup to parse Infos, and then specific specifications given on the runtime make specific examples? The steps involved will be great for getting a codeoutline.