public ActionResult LeaveEvent(int id)
 {
     ksc.Models.ActivityUser Activity = db.ActivityUsers.Single(u => u.id == id);
     db.ActivityUsers.Remove(Activity);
     db.SaveChanges();
     return(RedirectToAction("Index"));
 }
        public ActionResult GotoEvent(int id, int userId)
        {
            var nActivityUser = new ksc.Models.ActivityUser();

            nActivityUser.user_id     = userId;
            nActivityUser.activity_id = id;
            nActivityUser.status      = 0;
            db.ActivityUsers.Add(nActivityUser);
            db.SaveChanges();
            return(RedirectToAction("Index"));
        }