public static Presence PostPreOne(ClassPresence Pre)
        {
            Presence p = new Presence()
            {
                lesson_id = Pre.lesson_id,
                sub_id    = Pre.sub_id,
            };

            return(p);
        }
        public static List <ClassPresence> GetDtoPre(List <Presence> allp)
        {
            List <ClassPresence> DtoPre = new List <ClassPresence>();

            foreach (var item in allp)
            {
                ClassPresence p = new ClassPresence()
                {
                    lesson_id = item.lesson_id,
                    sub_id    = item.sub_id,
                };
                DtoPre.Add(p);
            }
            return(DtoPre);
        }