I have an Outlook plugin created that uses MEF to load extensions. The extensions are all created as C# class libraries. When the Outlook plugin starts, it copies all the plugin DLLs from a network directory to the local computer and then loads them via MEF.
For one of them, I'm using the MySql.Data.dll library. That dll is copied to the same directory where I place the DLL's which MEF loads in, but that one isn't working. The end user gets an exception saying it can't find that MySql dll.
What's the trick to placing extra DLLs that are needed by a class library included via an MEF import?
I haven't used MEF in a project but I have had to roll my own plug-in architecture on a couple of occassions. Something you can try is hooking in to the AppDomain.AssemblyResolve event. I don't know how useful the example is on that page but you could examine the assembly name in the event args and attempt to load that assembly from the same folder you are loading the plug-ins from.