public ActionResult DeleteChart(int id)
        {
            Chart           chart = ChartManager.GetChart(id, false);
            ApplicationUser user  = userManager.GetUser(User.Identity.GetUserId());

            if (user.Dashboard.Contains(chart))
            {
                user.Dashboard.Remove(chart);
                userManager.Update(user);
            }
            return(RedirectToAction("Index"));
        }