static void CreateData() { using (FlugDbContext ctx = new FlugDbContext()) { ctx.Database.EnsureDeleted(); ctx.Database.EnsureCreated(); var f1 = new Flight { FlightNumber = "LH0815", From = "Graz", To = "Hamburg", Date = DateTime.Now }; var b1 = new Booking { Price = 300 }; f1.Bookings.Add(b1); ctx.Flights.Add(f1); ctx.SaveChanges(); ctx.SaveChanges(); } }