public ActionResult DeleteConfirmed(int id)
        {
            #region EF6 Code
            //Glass glass = db.GlassSet.Find(id);
            //db.GlassSet.Remove(glass);
            //db.SaveChanges();
            //return RedirectToAction("Index");
            #endregion

            _repo.DeleteGlass(id);
            return(RedirectToAction("Index"));
        }