title: problems with beforeProperties, afterproperties and listItem in ItemUpdating of sharepoint form library
body: <p>These are the results that I am getting in ItemUpdating event receiver in a form library:</p>
  
  <pre><code>properties.BeforeProperties["CurrentUser"] returns null
  
  properties.AfterProperties["CurrentUser"] returns null
  
  properties.ListItem["CurrentUser"] returns the old value
  </code></pre>
  
  <p>How can I compare the old value with the new value in a SharePoint form library that is using infopath as forms?</p>
  
  <p>I have seen <a href="http://www.synergyonline.com/Blog/Lists/Posts/Post.aspx?ID=122" rel="nofollow">this site</a> but it is not helping me with my problem.</p>