private void AlignVertically(VerticalAlignment alignment)
 {
     var aligner = new Aligner(DesignSurface.SelectedItems.Cast<ICanvasItem>().ToList());
     aligner.AlignVertically(alignment);
 }
        private void AlignVertically(VerticalAlignment alignment)
        {
            var aligner = new Aligner(DesignSurface.SelectedItems.Cast <ICanvasItem>().ToList());

            aligner.AlignVertically(alignment);
        }