title: Building an ObjectContext in EF Code First CTP4
body: <p>I just upgraded to EF Code First CTP 4 and it looks like the ContextBuilder class was removed. I currently create my ObjectContext like so (in CTP 3):</p>
  
  <pre><code>var contextBuilder = new ContextBuilder&lt;ObjectContext&gt;();
  var connstr = ConfigurationManager.ConnectionStrings["MyConn"];
  var connection = new SqlConnection(connstr.ConnectionString);
  var ctx = contextBuilder.Create(connection);
  </code></pre>
  
  <p>I do not want to create a hardcoded class deriving from ObjectContext like so many of their examples seem to do. Anyone know how to do this in the new version?</p>