private bool IsDoctorAvailable(string doctorJmbg, DateTime dateTime) { if (!_doctorRepository.CheckIfDoctorExists(doctorJmbg)) { throw new BadRequestException("Doctor doesn't exist in database."); } if (_examinationRepository.GetExaminationsByDoctorAndDateTime(doctorJmbg, dateTime).Count > 0) { return(false); } return(true); }