public void Delete(int id)
 {
     using (TimeTrackerEntities db = new TimeTrackerEntities())
     {
         try
         {
             T_SupervisorMapping t_rs = new T_SupervisorMapping();
             t_rs = db.T_SupervisorMapping.FirstOrDefault(p => p.Id == id);
             db.T_SupervisorMapping.Remove(t_rs);
             db.SaveChanges();
         }
         catch (Exception ex)
         {
             string msg = ex.Message;
         }
     }
 }
        public void Insert(SupervisorMapping rm)
        {
            T_SupervisorMapping t_rm = new T_SupervisorMapping();
            t_rm.UserId = rm.UserId;
            t_rm.SupervisorId = rm.SupervisorId;

            using (TimeTrackerEntities db = new TimeTrackerEntities())
            {
                try
                {
                    db.T_SupervisorMapping.Add(t_rm);
                    db.SaveChanges();
                }
                catch (Exception ex)
                {
                    string msg = ex.Message;
                }
            }
        }