private void CopyCommand_Executed(object sender, ExecutedRoutedEventArgs e) => Text_field.Copy();
private void CutCommand_Execute(object sender, ExecutedRoutedEventArgs e) => Text_field.Cut();
private void PasteCommand_Executed(object sender, ExecutedRoutedEventArgs e) => Text_field.Paste();
public MainWindow()
{
InitializeComponent();
Text_field.Focus();
}