Saving multiple entities in one transaction using Entity Framework.

TransactionScope.cs

using (TransactionScope scope = new TransactionScope())
{
  // TODO: Working on saving transaction
  // Step 1
  if (driver.id > 0) _unitOfWork.PersonRepository.Update(driver); else _unitOfWork.PersonRepository.Add(driver);
  if (destination.id > 0) _unitOfWork.DestinationRepository.Update(destination); else _unitOfWork.DestinationRepository.Add(destination);
  _unitOfWork.Save();

  // Step 2
  transportation.id_persona_transportista = driver.id;
  transportation.id_destino = destination.id;
  if (transportation.id > 0) _unitOfWork.TransportationRepository.Update(transportation); else _unitOfWork.TransportationRepository.Add(transportation);
  _unitOfWork.Save();

  // Step 3
  if (manager.id > 0) _unitOfWork.PersonRepository.Update(manager); else _unitOfWork.PersonRepository.Add(manager);
  _unitOfWork.Save();

  // Step 4
  tracker.id_persona_encargado = manager.id;
  tracker.id_transporte = transportation.id;                    
  tracker.fecha_expedicion = DateTime.Now;
  tracker.tiempo_expedicion = DateTime.Now.TimeOfDay;
  _unitOfWork.TrackerRepository.Update(tracker);
  _unitOfWork.Save();

  // Step 5    
  scope.Complete(); // If we get here things are looking good.
  _unitOfWork.Save(); // If we get here it is save to accept all changes.
}
// Rolls back the transaction. Entity not committed.