public ActionResult DeleteRoleForUser(string email, string roleName)
        {
            var account = new AccountController();
            ApplicationUser user = db.Users.Where(u => u.UserName.Equals(email, StringComparison.CurrentCultureIgnoreCase)).FirstOrDefault();

            if (account.UserManager.IsInRole(user.Id, roleName))
            {
                account.UserManager.RemoveFromRole(user.Id, roleName);
                ViewBag.ResultMessage = "Role removed from this user successfully !";
            }
            else
            {
                ViewBag.ResultMessage = "This user doesn't belong to selected role.";
            }

            // prepopulat roles for the view dropdown
            var list = db.Roles.OrderBy(r => r.Name).ToList().Select(r => new SelectListItem { Value = r.Name.ToString(), Text = r.Name }).ToList();
            ViewBag.Roles = list;

            return View("ManageUserRoles");
        }
        public ActionResult RoleAddToUser(string email, string roleName)
        {
            ApplicationUser user = db.Users.Where(u => u.Email.Equals(email, StringComparison.CurrentCultureIgnoreCase)).FirstOrDefault();
            var account = new AccountController();
            account.UserManager.AddToRole(user.Id, roleName);

            ViewBag.ResultMessage = "Role created successfully !";

            // prepopulat roles for the view dropdown
            var list = db.Roles.OrderBy(r => r.Name).ToList().Select(r => new SelectListItem { Value = r.Name.ToString(), Text = r.Name }).ToList();
            ViewBag.Roles = list;

            return View("ManageUserRoles");
        }