private void btnModificar_Click(object sender, RoutedEventArgs e)
{
Paises r = ((Button)sender).DataContext as Paises;
long lID = r.ID;
Popups.Pais w = new Popups.Pais(lID);
w.ShowDialog();
realizarBusqueda(new Paises());
}
private void btnAdd_Click(object sender, RoutedEventArgs e)
{
Popups.Pais w = new Popups.Pais();
w.ShowDialog();
realizarBusqueda(new Paises());
}