Check if it is a key up action : Key Event « Windows Presentation Foundation « C# / CSharp Tutorial

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C# / CSharp Tutorial » Windows Presentation Foundation » Key Event   24.122.17.Check if it is a key up action using System; using System.Reflection; using System.Windows; using System.Windows.Input; using System.Windows.Media;     public class MainClass : Window     {         [STAThread]         public static void Main()         {             Application app = new Application();             app.Run(new MainClass());         }         public MainClass()         {         }         protected override void OnKeyDown(KeyEventArgs args)         {             if (args.Key == Key.Up)             {                 Console.WriteLine("Key.Up");             }             base.OnKeyDown(args);         }     } 24.122.Key Event 24.122.1. Query Left / Right control key 24.122.2. Query Left / Right Shift key 24.122.3. Is Key.CapsLock Toggled 24.122.4. Keyboard.IsKeyToggled 24.122.5. Query Number lock key 24.122.6. Use Keyboard.Focus to set the focus to a Text Field 24.122.7. Programmatically Extract an Element's Style with DefaultStyleKeyProperty 24.122.8. Provide Quick Keyboard Access to Buttons 24.122.9. Reading keyboard modifiers 24.122.10. Reading individual key state with Keyboard.IsKeyDown 24.122.11. Suppress Keyboard and Mouse Events 24.122.12. Use KeyBinding to bind Key event to TextBox.InputBindings 24.122.13. StackPanel PreviewTextInput and PreviewKeyDown 24.122.14. If input is not a number do not handle the key event 24.122.15. On Key Down Handler 24.122.16. Check if it is a key down action 24.122.17. Check if it is a key up action 24.122.18. Record Key strokes 24.122.19. Override OnTextInput method to get the input from key board 24.122.20. TextBox key pressed action listener, and set caret index for TextBox 24.122.21. override key down method to listen to key down event 24.122.22. Check key code for Key.Up and Key.Down