public MainWindow() { InitializeComponent(); wekker = new Wekker(); timer1 = new DispatcherTimer(); timer1.Interval = TimeSpan.FromMilliseconds(1000); timer1.Tick += timer1_Tick; currentTimeLabel.Background = new SolidColorBrush(Colors.LightGray); alarmTimeTextBox.Text = "__:__:__"; timer1.Start(); }