public void SetAppointmentsReferralDeleted(Appointment appointment)
 {
     if (_referralService.GetAppointmentsReferral(appointment) != null)
     {
         Referral referal1 = ReferralAdapter.ReferralDtoToReferral(_referralService.GetAppointmentsReferral(appointment));
         Referral referal2 = _dbContext.Referrals.SingleOrDefault(referral => referral.Id == referal1.Id);
         referal2.IsDeleted = true;
         _dbContext.SaveChanges();
     }
 }