private void InitTickets() { Ticket ticket1 = new Ticket(); Ticket ticket2 = new Ticket(); ticket1.Id = 1; ticket1.Coupons[0] = Coupons.Find(f => f.Id == 1); ticket1.Coupons[1] = Coupons.Find(f => f.Id == 3); ticket2.Id = 2; ticket2.Coupons[0] = Coupons.Find(f => f.Id == 2); Tickets.Add(ticket1); Tickets.Add(ticket2); Coupons.Find(c => c.Id == 1).Ticket = ticket1; Coupons.Find(c => c.Id == 2).Ticket = ticket2; Coupons.Find(c => c.Id == 3).Ticket = ticket1; }