title: Silverlight 4: change themes/styles for whole app without using Toolkit
body: <p>We are embarking on our first Silverlight project, coming from WPF. It's a relatively simple web portal and we would like to avoid references to the Silverlight Toolkit, given our experience with the WPF toolkit.</p>
  
  <p>I'm not much of a coder and have a couple questions related to themes:</p>
  
  <ul>
  <li><p>Implicit styles make this easier. It seems clear you could just switch out resource dictionaries to change your theme. How do I do this without relying on the Toolkit?</p></li>
  <li><p>How do I apply the styles to the entire application, like in WPF, instead of wrapping things in the theme containers? I see there is an ApplicationThemeURI you can use, but that requires the toolkit.</p></li>
  </ul>
  
  <p>Thanks.</p>