public void RemoveArea(int id)
{
var area = _areaRepository.Get(id);;
if (area == null)
{
throw new NullReferenceException("Area does not exist!");
}
var activeBenefits = _benefitRepository.GetActive(area.Id).Count;
if (activeBenefits != 0)
{
new Exception("Active programs present.");
}
_benefitRepository.DeleteAll(area.Id);
_areaRepository.Delete(id, area);
}