ASP.Net MVC Join Error: the name st is not in scope on the left side of equals. consider swapping the expression on either side of equals

showing error the name st is not in scope on the left side of equals.

consider swapping the expression on either side of equals.

            var usr = new List<user_detail>();
            usr = (from u in db.Users
                   join st in db.States on st.State_id equals u.State
                   select new user_detail()
                   {

                       User_id = u.User_id,
                       Name = u.Name,
                      
                       State_Name = st.State1,
                       //State =  IEnumerable <string><s.State1>,
                       Phone = u.Phone,
                       
                   }).ToList();
           // var srv = db.Users.ToList();
            return View(usr);