public static IHtmlString ShowSpeakerLinks(this HtmlHelper htmlHelper, SpeakerListModel model)
        {
            var zeigen= htmlHelper.ActionLink("Zeigen", "Details", "Speaker", new
            {
                id = model.Id
            }, null);

            var sessions = htmlHelper.ActionLink("Sessions", "List", "SpeakerSession", new
            {
                speakerid = model.Id
            }, null);

            return new HtmlString(string.Format("{0} | {1}",zeigen,sessions));
        }
 public static IHtmlString ShowSpeaker(this HtmlHelper htmlHelper, string caption, SpeakerListModel model)
 {
     return htmlHelper.ActionLink(caption, "Details", "Speaker", new {
         id = model.Id
     }, null);
 }