title: Sharepoint 2010 Visual WebPart and LinqDataSource
body: <p>How do I use Linq DataSource in a SharePoint 2010 Visual Web-part. When I type <code>&lt;asp:LinqDataSource</code> there are nothing in the Visual Studio auto-complete. When I run the code I would get this error Unknown server tag 'asp:Linq DataSource'</p>
  
  <p>Thanks for your help.</p>