private void button1_Click(object sender, EventArgs e) { newdata data_frm; CreateRFile createRFile; if (radioButton2.Checked) { data_frm = new newdata(); data_frm.Show(); this.Close(); } else if (radioButton1.Checked) { createRFile = new CreateRFile(); createRFile.Show(); this.Close(); } else { MessageBox.Show("Выберите метод исследования"); } }