public MainWindow() { InitializeComponent(); pm = ParkingManager.GetParkingManager(); ParkingStatusBar.Value = pm.GetFilledPlaces() * 100; ParkingStatusBox.Text = (ParkingStatusBar.Value).ToString() + "%"; activeSessions = pm.GetActiveSessions(); pastSessions = pm.GetPastSessions(); var activeList = new List <string>(); foreach (var s in activeSessions) { activeList.Add(s.CarPlateNumber + " " + s.EntryDt.ToString()); } GetActive.ItemsSource = activeList; var pastList = new List <string>(); foreach (var s in pastSessions) { pastList.Add(s.CarPlateNumber + " " + s.EntryDt.ToString()); } GetPast.ItemsSource = pastList; }