title: Include before join Doesn't work Entity Framework 6
body: <p>In an MVC4 project
  I use include in a LINQ query:</p>
  
  <pre><code>&gt; var tests = from ct in context.CourseTest.Include("Test")  join uc in
  &gt; context.UserCourse on ct.CourseID equals uc.CourseID select ct;
  </code></pre>
  
  <p>CourseTest has a Test Object</p>
  
  <p>This works inside the "using context"</p>
  
  <p>but once returned to the controller using:</p>
  
  <p>return tests.ToList();</p>
  
  <p>the </p>
  
  <p>UserCourse.Test is being disposed:</p>
  
  <blockquote>
    <p>The ObjectContext instance has been disposed and can no longer be used
    for operations that require a connection.</p>
  </blockquote>
  
  <p>This used to work fine in older version (not sure if I tested it with the join).</p>
  
  <p>How can I make it stick.. ?</p>