public static void CreateConnectionFlightTicket()
{
Flights = Flights.GroupJoin(Tickets, x => x.Id, x => x.FlightId,
(flight, tickets) => new Flight()
{
Id = flight.Id,
ArrivalPoint = flight.ArrivalPoint,
ArrivalTime = flight.ArrivalTime,
DeparturePoint = flight.DeparturePoint,
DepartureTime = flight.DepartureTime,
Tickets = new List <Ticket>(tickets),
TicketsId = flight.TicketsId
}).ToList();
}