using System.Windows; namespace WPF_2_CodeBehind; /// /// Interaction logic for MainWindow.xaml /// public partial class MainWindow : Window { private bool _isRunning; public MainWindow() { InitializeComponent(); } private void ButtonToggleRun_OnClick(object sender, RoutedEventArgs e) { TbHellBlock.Text = "TB Hello"; TbHellBlock.VerticalAlignment = VerticalAlignment.Top; ButtonToggleRun.Content = _isRunning ? "Stop" : "Running"; _isRunning = !_isRunning; } }