TypeDescriptor does not work with Mef

Question

Hi,

I have assembly loaded by mef. it contains class with custom typedescriptor.

If the assembly is in the same folder as executing assembly, custom typedescriptor is loaded, but if I move it to my "Modules" folder, the typedescriptor won't initialize.

  [TypeDescriptionProvider(typeof(MyTypeDescriptionProvider))]
  public class CustomClass
  {

  }

      //load mefmodule
      var container = new CompositionContainer(new AssemblyCatalog("Modules/CustomObjectModule.dll"));

      ICustomClassModule module = container.GetExportedValue<ICustomClassModule>();

 var customClassInstance = module.GetCustomClassInstance();

// TypeDescriptor.GetProperties(customClassInstance).Count == 0

When I copy and paste CustomObjectModule.dll to executing assembly folder TypeDescriptor.GetProperties works properly and return 3 properties.

I provided a sample project that demonstrates the problem: https://skydrive.live.com/redir?resid=51A46BBA4E9EF07E!1181


Is there any workaround?

Answer 1

Hi Daniel ,

For MEF related issue please use more appropriate forum here: http://social.msdn.microsoft.com/Forums/en-US/MEFramework/threads

Thanks.

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Bob Shen [MSFT]
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