public static string ConferenceLink(this HtmlHelper html, ConferenceInput conferenceInput)
 {            
     return html.RouteLink(conferenceInput.Name, "conferencedefault", 
         new { controller="conference", action="index", conferenceKey = conferenceInput.Key }).ToString();
 }
 public static string DateBadge(this HtmlHelper html, ConferenceInput conferenceInput)
 {
     return "";
 }