title: The documentation cache is still being constructed... message won't go away in VS 2010
body: <p>I recently found out that trying to see the documentation on any method or property in Visual Studio just stopped working and it always comes with the message:
  <strong><em>The documentation cache is still being constructed.  Please try again in a few seconds.</em></strong>
  Before, it was just a second and then it worked, now it just won't show the documentation anymore. </p>
  
  <p>How dows this documentation cache works but more important, what can cause it to stop working?. </p>
  
  <p>Any suggestions are welcome. Thanks</p>