NavigationService in Windows Phone Silverlight

Question

I can call NavigationService with a Btn_Click method

private void Com_Click(object sender, RoutedEventArgs e)
{   string test = "Com";
    var x = NavigationService.Navigate(new Uri(@"/PageList.xaml" + "?msg1=" + test, UriKind.Relative));
}

But I can't call the same Service on this way

public MainPage()
{
    InitializeComponent();
    ...
    Test();
}    
private void Test()
{   string test = "Com";
    var x = NavigationService.Navigate(new Uri(@"/PageList.xaml" +   "?msg1=" + test, UriKind.Relative));
}

Answer 1

Try without var x = :

  private void Test()
  {  
    string test = "Com";
     NavigationService.Navigate(new Uri(@"/PageList.xaml" +   "?msg1=" + test, UriKind.Relative));
  }