public async Task <ActionResult> AddEductionalCenterSubject([FromForm] EductionalCenterSubjects eductionalCenterSubject)
        {
            if (ModelState.IsValid)
            {
                if (eductionalCenterSubject != null)
                {
                    await _eductionalCenterSubjectRepository.AddEductionalCenterSubject(eductionalCenterSubject);

                    return(Created("EductionalCenterTable", eductionalCenterSubject));
                }
                else
                {
                    return(NotFound());
                }
            }
            return(BadRequest());
        }
 // remove eductionalCenterSubject
 public async Task DeleteEductionalCenterSubject(EductionalCenterSubjects eductionalCenterSubject)
 {
     _context.EductionalCenterSubjects.Remove(eductionalCenterSubject);
     await _context.SaveChangesAsync();
 }
        // Add new EductionalCenterSubject to EductionalCenter
        public async Task AddEductionalCenterSubject(EductionalCenterSubjects eductionalCenterSubject)
        {
            await _context.EductionalCenterSubjects.AddAsync(eductionalCenterSubject);

            await _context.SaveChangesAsync();
        }