title: A good Silverlight 3.0 reference application, with source?
body: <p>Having never written a production quality Silverlight app, I am looking to find a quality open source reference application for Silverlight 3.0 (Silverlight 4.0 is no good as I have VS2008) to help learn Silverlight.</p>
  
  <p>Ideally I'd like to see:</p>
  
  <ul>
  <li>a line of business application, in the client-server tradition.</li>
  <li>SQL Server back end</li>
  <li>no use of 3rd party libraries like PRISM or CSLA as I would like to see how the core Silverlight technologies work.</li>
  </ul>
  
  <p>I realise there are plenty of open source projects on Codeplex, but struggled to find any classic line of business apps there.</p>