public override int GetHashCode() { var hashCode = 1326052177; hashCode = hashCode * -1521134295 + Id.GetHashCode(); hashCode = hashCode * -1521134295 + EqualityComparer <FlightSchedule> .Default.GetHashCode(Schedule); hashCode = hashCode * -1521134295 + EqualityComparer <Airport> .Default.GetHashCode(OriginAirport); hashCode = hashCode * -1521134295 + EqualityComparer <Airport> .Default.GetHashCode(DestinationAirport); hashCode = hashCode * -1521134295 + DepartureDateTime.GetHashCode(); hashCode = hashCode * -1521134295 + ArrivalDateTime.GetHashCode(); return(hashCode); }