public static MvcHtmlString LanguageLink(this HtmlHelper htmlHelper, Language language, ViewContext viewContext)
{
var controllerName = viewContext.Controller.ControllerContext.RouteData.Values["controller"].ToString();
var actionName = viewContext.Controller.ControllerContext.RouteData.Values["action"].ToString();
var currentLanguage = (Language)viewContext.ViewBag.CurrentLanguage;
var isCurrentLanguage = language == currentLanguage;
var css = "btn";
if (isCurrentLanguage)
css += " btn-success";
else
css += " btn-default";
var routeValues = new RouteValueDictionary(viewContext.Controller.ControllerContext.RouteData.Values);
routeValues["language"] = language;
return htmlHelper.ActionLink(language.GetDescription(), actionName, controllerName, routeValues, new Dictionary<string, object> { { "class", css } });
}