This document discusses WPF styling architecture. It defines what styles are, why they are needed, and the different types of styles. It describes the WPF styling architecture, which includes themes at the top level composed of control styles. Control styles contain general, layout and font styles. General styles contain brushes, and brushes contain primitive colors. The architecture provides advantages like separation of layout and content, flexibility, reusability, and maintainability. It concludes with a demo and invitation for questions.