MEF - can't run imported function

Question

Hi all!

 

Could You please help. In main program, i do import my plug-in in this way

public static void LoadContainer(Unity.IUnityContainer container, string path, string pattern)
        {
            var dirCat = new DirectoryCatalog(path, pattern);
            var importDef = BuildImportDefinition();

            try
            {
                using (var aggregateCatalog = new AggregateCatalog())
                {
                    aggregateCatalog.Catalogs.Add(dirCat);
                    using (var componsitionContainer = new CompositionContainer(aggregateCatalog))
                    {
                        IEnumerable exports = componsitionContainer.GetExports(importDef);

                        IEnumerable modules = exports.Select(export => export.Value as IComponent).Where(m => m != null);



                        //((System.ComponentModel.Composition.Primitives.ExportedDelegate)exports.Select(export => export.Value).ToArray()[0]).CreateDelegate(typeof(IComponent))

                        try
                        {
                            var v0 = exports.Select(export => export.Value).ToArray()[0];
                            var v1 = (IComponent)v0;
                        }
                        catch (Exception ex) { ex.ToString(); }

                        var registerComponent = new RegisterComponent(container);
                        foreach (IComponent module in modules)
                        {
                            module.SetUp(registerComponent);
                        }
                    }
                }
            }

where IComponent is

public interface IComponent
{
    void SetUp(IRegisterComponent registerComponent);
    String Test();
}

and exported function is

class DependencyResolver : IComponent
   {
       [System.ComponentModel.Composition.Export(typeof(IComponent))]
       public void SetUp(IRegisterComponent registerComponent)
       {
           registerComponent.RegisterType();
       }

       [System.ComponentModel.Composition.Export("mimi")]
       public string Test()
       {
           return "test)";
       }
   }

The problem is in line

IEnumerable modules = exports.Select(export => export.Value as IComponent).Where(m => m != null);

 i got always empty list, because  export.Value is type {System.ComponentModel.Composition.Primitives.ExportedDelegate} and it can't be converted to type IComponent. Could You please advise me way to execute export.Value delegate?

 

Thanks!

 

PS I use VS2017 and full example is available at 

https://www.codeproject.com/Articles/997216/RESTful-Day-sharp-Resolve-dependency-of-dependenci