public long?AddApartament(ViewAddress v, Guid userId)
{
Trace.Assert(_db != null);
Trace.Assert(v != null);
ObjectResult <long?> result = _db.AddApartament(v.Apartament, v.BuildingID, userId);
Trace.Assert(result != null);
IEnumerator <long?> resultList = result.GetEnumerator();
Trace.Assert(resultList != null);
resultList.MoveNext();
long?id = resultList.Current;
resultList.Dispose(); // for transaction to be able to complete
return(id);
}