public ActionResult GetRoles(string UserName)
        {
            if (!string.IsNullOrWhiteSpace(UserName))
            {
                UserManager<ApplicationUser> _userManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(new ApplicationDbContext()));
                ApplicationUser user = context.Users.Where(u => u.UserName.Equals(UserName, StringComparison.CurrentCultureIgnoreCase)).FirstOrDefault();
                var account = new AccountController();

                ViewBag.RolesForThisUser = _userManager.GetRoles(user.Id);

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

            return View("Index");
        }
        public ActionResult DeleteRoleForUser(string UserName, string RoleName)
        {
            UserManager<ApplicationUser> _userManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(new ApplicationDbContext()));
            var account = new AccountController();
            ApplicationUser user = context.Users.Where(u => u.UserName.Equals(UserName, StringComparison.CurrentCultureIgnoreCase)).FirstOrDefault();

            if (_userManager.IsInRole(user.Id, RoleName))
            {
                _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 = context.Roles.OrderBy(r => r.Name).ToList().Select(rr => new SelectListItem { Value = rr.Name.ToString(), Text = rr.Name }).ToList();
                var userlist = context.Users.OrderBy(r => r.UserName).ToList().Select(rr =>
                new SelectListItem { Value = rr.UserName.ToString(), Text = rr.UserName }).ToList();
                ViewBag.Roles = list;
                ViewBag.Users = userlist;

            return View("Index");
        }