public async Task <ActionResult> Index(IEnumerable <string> RoleName, string userid)
        {
            try
            {
                if (ModelState.IsValid)
                {
                    IEnumerable <string> rolenames         = RoleName ?? new List <string>();
                    IEnumerable <string> selectedRoleNames = rolenames;
                    // IEnumerable<string> unselectedRoleNAmes = Helper.GetRoles().Select(a => a.Name).Except(rolenames);

                    foreach (var role in selectedRoleNames.ToList())
                    {
                        if (!UserManagerApp.IsInRole(userid, role))
                        {
                            await UserManagerApp.AddToRoleAsync(userid, role);

                            // Success("User added to role" + role, true);
                        }
                    }

                    //foreach (var srole in unselectedRoleNAmes.ToList())
                    //{
                    //    if (UserManagerApp.IsInRole(userid, srole))
                    //    {
                    //        await UserManagerApp.RemoveFromRolesAsync(userid, srole);
                    //       // Success("User removed from role " + srole, true);
                    //    }
                    //}

                    return(RedirectToAction("Index"));
                }
                else
                {
                    return(View());
                }
            }
            catch (Exception)
            {
                //Danger("Somethings was wrong!", true);
                ModelState.AddModelError("", "Something was wrong");
                return(View());
            }
        }