public MainWindow()
 {
     InitializeComponent();
     HourTextBox.Focus();
 }
 private void AbortButton_Click(object sender, RoutedEventArgs e)
 {
     Process.Start("shutdown.exe", "-a");
     HourTextBox.Focus();
 }
 private void DayComboBoxSelectedIndexChanged(object sender, EventArgs e)
 {
     HourTextBox.Focus();
 }