private void Button_Click(object sender, RoutedEventArgs e)
{
Historico h = new Historico("Thiago");
h.Inserir(new Disciplina("POO", 80));
h.Inserir(new Disciplina("Design", 70));
h.Inserir(new Disciplina("Física", 95));
list.ItemsSource = h.Listar(); // h.discs;
txt.Text = h.IRA().ToString();
}
private void Button_Click_3(object sender, RoutedEventArgs e)
{
MessageBox.Show(h.IRA().ToString());
}