public CustomerDialog(Customer c, ToolRentalDbContext dbContext) { InitializeComponent(); this.dbContext = dbContext; customer = c; customerDialogGrid.DataContext = customer; List <Reservation> customersReservations = dbContext.ReservationSet.ToList().FindAll(res => res.CustomerRefId == customer.CustomerId); foreach (Reservation r in customersReservations) { reservations.Add(r); } Console.WriteLine("ANTAL RESERVATIONER: " + customersReservations.Count); lbCustomerReservations.ItemsSource = reservations; DataContext = this; }