private static void Main(string[] args)
{
var sessionModel = new SessionModel(3);
// first case (see text down below):
var catalog = new AssemblyCatalog
(System.Reflection.Assembly.GetExecutingAssembly());
var compositionContainer = new CompositionContainer(catalog);
// second case (see text down below):
//var typeCatalog = new TypeCatalog(typeof (SessionModel));
//var compositionContainer = new CompositionContainer(typeCatalog);
//compositionContainer.ComposeExportedValue(sessionModel);
var someService = compositionContainer.GetExportedValue <ISomeService>();
someService.DoSomething();
}