Creating multiple concrete objects from the same interface

[tigershark666]

Currently it is not possible to create different concrete types using the same factory.
I think that it would be very good to allow this behavior, so when writing GUIs it will be possible to have a generic ViewModelFactory that will create different ViewModels, or a MenuItemFactory that can create multiple MenuItem commands.
If I manage to get some free time I can give it a try to implement it.