((AggregateModuleCatalog)ModuleCatalog) gives Compile error : modulecatalog is a type which is not valid in given context

[stevensrf11]

I am trying to use the AggregateModuleCatalog class in .net ore PRISM 8 from the prism quick starts modularity desktop application from PRISM 5
But when using I get a compile error on this line of code
((AggregateModuleCatalog)ModuleCatalog).AddCatalog(directoryCatalog);

Compile error is
ModuleCatalog is a type which is not valid in given context

Anyone have any fixex for this or have upgraded to Quick Starts Modularity DeskTop application to Prism 8 and having it working and could email me the code?

Thank you

[stevensrf11]

Oh neve mind I see it should be
((AggregateModuleCatalog)moduleCatalog).AddCatalog(directoryCatalog);
to fix the compile error.

Still I be interested if anyone has upgrader the PRISM 5 modularity desktop solution to PRISM 8 in .Net 5 and actually got it to work

protected override void ConfigureModuleCatalog(IModuleCatalog moduleCatalog)
{
Type xpubEntAppModule = typeof(SuperUserModule);
var directoryCatalog = new DirectoryModuleCatalog() { ModulePath = @".\DirectoryModules" };
((AggregateModuleCatalog)moduleCatalog).AddCatalog(directoryCatalog);