public override string ToString()
{
return string.Format("[NumberPurchaseRequest: TollFreeCount={0}, LocalCount={1}, Prefix={2}, City={3}, State={4}, Zipcode={5}, Lata={6}, RateCenter={7}, Numbers={8}]",
TollFreeCount, LocalCount, Prefix, City, State, Zipcode, Lata, RateCenter, Numbers?.ToPrettyString());
}