title: How to theme WPF custom controls
body: <p>How I do define and apply themes to my custom control that is hosted in an ElementHost.</p>
  
  <p>VS created Generic.xaml in the Themes folder. If I renamed it to something else (like Blue.xaml), the entire control does not show up.</p>
  
  <p>Another question is what theme xaml files should be set to in VS: Content, Page or Resource?</p>