private void button2_Click(object sender, EventArgs e) { switch (num) { case 1: newForm.Close(); elder.Show(); Close(); break; case 2: newForm2.Close(); elder.Show(); Close(); break; case 3: newForm3.Close(); elder.Show(); Close(); break; case 4: newForm4.Close(); elder.Show(); Close(); break; case 5: newForm5.Close(); elder.Show(); Close(); break; case 6: newForm6.Close(); elder.Show(); Close(); break; case 7: newForm7.Close(); elder.Show(); Close(); break; } }