关于编码规范

public static MvcForm BeginRouteForm(this AjaxHelper ajaxHelper, string routeName, RouteValueDictionary routeValues, AjaxOptions ajaxOptions)
{
return BeginRouteForm(ajaxHelper, routeName, routeValues, ajaxOptions, null /* htmlAttributes */);
}

public static MvcForm BeginRouteForm(this AjaxHelper ajaxHelper, string routeName, RouteValueDictionary routeValues, AjaxOptions ajaxOptions)
{
return BeginRouteForm(ajaxHelper, routeName, routeValues, ajaxOptions, htmlAttributes: null );
}