private void btnPrincipal_Click(object sender, RoutedEventArgs e)
{
// limpa children
PageReturn pr = new PageReturn();
LayoutRoot.Children.Clear();
LayoutRoot.Children.Add(pr);
}
void Cover_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
_pagereturn = new PageReturn();
LayoutRoot.Children.Remove(Cover);
LayoutRoot.Children.Remove(imagemInicial);
LayoutRoot.Children.Remove(lbAcesse);
LayoutRoot.Children.Add(_pagereturn);
}
