title: Using Include in Entity Framework 4 with lambda expressions
body: <p>I've seen many articles about how to overcome this matter, all related to CTP4, Or adding my own extension methods.</p>
  
  <p>Is there an "official" EF4 included way to use lambda expressions inside include (for both first level relations and also 2nd and more level) or is it eventually was not included in the RTM ? </p>
  
  <p>It there is one - I would be glad to learn how to do it, as using lambda expression in my code now (with #system.data.entity #system.data.linq) still gives me: </p>
  
  <p>Cannot convert lambda expression to type 'string' because it is not a delegate type 
  on: </p>
  
  <pre class="lang-cs prettyprint-override"><code>var customers = from c in
  context.Customers.Include(c=&gt;c.Phone)
  </code></pre>