Please don't worry about that, in our version 10 it still can be used.
The WorldStreetsAreaStyls is not the same match AreaStyles, it render the style better.
If you want to use Country2, I suggest you create it like this:
CreateSimpleAreaStyle(GeoColor.StandardColors.Transparent, GeoColor.FromArgb(255, 118, 138, 69))
Any other style you want can be listed here, I will let you know how to render it.
Wish that's helpful.