private void OnExitButtonClick(object sender, RoutedEventArgs e)
        {
            MessageBoxResult askResult = MessageBox.ShowQuestion("Do you want to Exit?", "The scheduler cannot remind you during offline mode!\nYes: Exit (offline mode)\nNo: Minimize to tray (working reminder)\nCancel: Cancel command", true);

            if (askResult == MessageBoxResult.Yes)
            {
                Environment.Exit(0);
            }
            if (askResult == MessageBoxResult.No)
            {
                WindowState = WindowState.Minimized;
            }
        }
        protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
        {
            //base.OnClosing(e);
            e.Cancel = true;
            //Environment.Exit(0);
            MessageBoxResult askResult = MessageBox.ShowQuestion("Do you want to Exit?", "The scheduler cannot remind you during offline mode!\nYes: Exit (offline mode)\nNo: Minimize to tray (working reminder)\nCancel: Cancel command", true);

            if (askResult == MessageBoxResult.Yes)
            {
                Environment.Exit(0);
            }
            if (askResult == MessageBoxResult.No)
            {
                WindowState = WindowState.Minimized;
            }
            //this.Hide();
            //
        }
 private void ShowQuestion_Click(object sender, RoutedEventArgs e)
 {
     MessageBox.ShowQuestion("Hello World?", "Is it?");
 }