Retina graphics issue

Hi,

I have my graphics stored in a directory called graphics. In there I have say "hello.png" and "hello@2x.png". When I create my UI, I create the images on the tabbaritems in a pretty standard way and using UIImage.FromFile(...) to pull in the graphics.

This won't pull in the retina graphics, so I'm wondering if there is a way to determine if the phone is retina or not and then explicitly specify which graphics set to use.

Any advice here?

Paul