When XML web part is added to master page/page layout outside the web part zone the web part's OnPreRender method throws NullReferenceException when it tries to reference it's WebPartManager. Possi...
After retracting solution, the httpHandler remains in web.config <add verb="*" path="opml.ashx" type="LitwareAjaxWebParts.FeedListHandler, LitwareAjaxWebParts" />
Implement AJAX List View