public void Delete(ProviderTreatment entity)
        {
            var data = (from proTre in _context.ProviderTreatments
                        where proTre.ProviderId == entity.ProviderId && proTre.TreatmentId == entity.TreatmentId
                        select proTre).FirstOrDefault();

            if (data != null)
            {
                _context.ProviderTreatments.Remove(data);
            }
            else
            {
                throw new Exception("Treatment does not exist.");
            }
        }
        public void AddProviderTreatments(ProviderTreatment entity)
        {
            var data = (from proTre in _context.ProviderTreatments
                        where proTre.ProviderId == entity.ProviderId && proTre.TreatmentId == entity.TreatmentId
                        select proTre).FirstOrDefault();

            if (data == null)
            {
                _context.ProviderTreatments.Add(entity);
            }
            else
            {
                throw new Exception("Treatment already added.");
            }
        }
 public void Save(ProviderTreatment entity)
 {
     _context.ProviderTreatments.Add(entity);
 }