private void prepareNavigationItem()
        {
            NavigationItem.SetTitle("Material");
            NavigationItem.SetDetail("Build Beautiful Software");;
            NavigationItem.SetLeftViews(new List <UIView>()
            {
                menuButton
            });


            NavigationItem.SetRightViews(new List <UIView>()
            {
                starButton, searchButton
            });
        }