public IActionResult Post([FromBody] ClassroomModel classroom) { var cl = Mapper.Map <Classroom>(classroom); cl.ClassroomId = _classroomRepository.GetMaxId() + 1; cl.SchoolId = classroom.SchoolId; cl.Name = classroom.Name; cl.Teacher = classroom.Teacher; _classroomRepository.Add(cl); var result = _classroomRepository.Fetch(); var results = Mapper.Map <IEnumerable <ClassroomModel> >(result); return(new ObjectResult(results)); }