public Result <bool> insertMon(string ma, string ten)
        {
            Mon_ctrl temp = new Mon_ctrl();

            return(temp.insert_mon(new Mon_ett(ma, ten)));
        }
        public Result <List <Mon_ett> > selectByFieldsMon(string inputName, string how)
        {
            Mon_ctrl temp = new Mon_ctrl();

            return(temp.select_by_fields(inputName, how));
        }
        public Result <bool> editMon(string ma, string ten)
        {
            Mon_ctrl temp = new Mon_ctrl();

            return(temp.edit_mon(ma, ten));
        }
        public Result <List <Mon_ett> > selectAllMon()
        {
            Mon_ctrl temp = new Mon_ctrl();

            return(temp.select_all_mon());
        }
        public Result <bool> deleteMon(string ma)
        {
            Mon_ctrl temp = new Mon_ctrl();

            return(temp.delete_mon(ma));
        }