public override string ToString() { StringBuilder sb = new StringBuilder("Trip("); sb.Append("Id: "); sb.Append(Id); sb.Append(",TouristAttraction: "); sb.Append(TouristAttraction); sb.Append(",TransportCompany: "); sb.Append(TransportCompany); sb.Append(",LeavingHour: "); sb.Append(LeavingHour == null ? "<null>" : LeavingHour.ToString()); sb.Append(",Price: "); sb.Append(Price); sb.Append(",NrSeats: "); sb.Append(NrSeats); sb.Append(")"); return(sb.ToString()); }