private RibbonGroup CreateGroup2()
        {
            Gallery gallery = new Gallery ();
            gallery.AppendTile (new SampleTile ("1"));
            gallery.AppendTile (new SampleTile ("2"));
            gallery.AppendTile (new SampleTile ("3"));
            gallery.AppendTile (new SampleTile ("4"));
            gallery.AppendTile (new SampleTile ("5"));

            RibbonGroup group2 = new RibbonGroup ();
            group2.Label = "Gallery";
            group2.Child = gallery;

            return group2;
        }