title: I can't find "Include" method with lambda expression in Entity framework?
body: <p>I am using entity framework and I can't find include method like in this example:</p>
  
  <pre><code>using(ArticleExtractorEntities db=new ArticleExtractorEntities())  
  {
      Preference pref= db.Preferences.Include(  
  </code></pre>
  
  <p>here i find only the function include with the parameter (string path) and I don't find any other overload so how can I use Include with lambda expression?</p>