Silverlight toolkit themes override styles?

I have a Silverlight app that has a bunch of styles that are referenced everywhere in various controls...etc. If I apply one of the default silverlight.toolkit.themes to the app will these styles be ove开发者_高级运维rridden by the them (assuming the theme affects whatever the styles are applied to)?

Thanks!!

i upgraded to sl 4.0. so the theme/stlyes are all implicit. case closed.