public ActionResult AssignTickets(AssignTicketsViewModel model)
        {
            var ticket = DbContext.TicketsDatabase.FirstOrDefault(p => p.Id == model.TicketId);

            if (ticket == null)
            {
                return(RedirectToAction(nameof(TicketsController.Tickets)));
            }

            if (model.SelectedRemoveUsers != null)
            {
                //    DbContext.Users.First(user => ticket.AssignedToId == user.Id).AssignedTickets.Remove(ticket);

                ticket.AssignedTo   = null;
                ticket.AssignedToId = null;
            }

            if (model.SelectedAddUsers != null)
            {
                var assignedUser = DbContext.Users.FirstOrDefault(p => p.Id == model.SelectedAddUsers);
                ticket.AssignedTo = assignedUser;
                var userManager = HttpContext.GetOwinContext().GetUserManager <ApplicationUserManager>();

                userManager.SendEmailAsync(assignedUser.Id, "Notification", "You are assigned to a new Ticket.");
                DbContext.SaveChanges();
            }
            return(RedirectToAction("Index"));
        }
        public ActionResult AssignTickets(int?TicketId)
        {
            if (!TicketId.HasValue)
            {
                return(RedirectToAction(nameof(TicketsController.Tickets)));
            }
            var roleManager = new RoleManager <IdentityRole>(new RoleStore <IdentityRole>(DbContext));
            var model       = new AssignTicketsViewModel();
            var ticket      = DbContext.TicketsDatabase.FirstOrDefault(p => p.Id == TicketId);

            model.TicketId = ticket.Id;
            var users           = DbContext.Users.ToList();
            var developerRoleId = roleManager.Roles.First(role => role.Name == "developer").Id;
            var developer       = DbContext.Users.Where(user => user.Roles.Any(role => role.RoleId == developerRoleId)).ToList();

            model.AddUsers = new SelectList(developer, "Id", "Email");

            return(View(model));
        }