private void btnNextPage2_Click(object sender, RoutedEventArgs e)
{
Page2 page = new Page2("I've been passed this text");
NavigationService ns = this.NavigationService;
ns.Navigate(page);
}
private void btnNextPage_Click(object sender, RoutedEventArgs e)
{
Page2 page = new Page2();
NavigationService ns = this.NavigationService;
ns.Navigate(page);
}