MEF - can't run imported function

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