// GET: Glasses/Delete/5
        public ActionResult Delete(int?id)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }
            Glass glass = _repo.GetGlassById(id.Value);

            if (glass == null)
            {
                return(HttpNotFound());
            }
            return(View(glass));
        }