private void данныеДляПроверкиToolStripMenuItem_Click(object sender, EventArgs e)
 {
     DataBlackBox dataBlackBox = new DataBlackBox(Convert.ToInt32(numPrepod));
     dataBlackBox.Show();
 }
 private void button4_Click(object sender, EventArgs e)
 {
     DataBlackBox dataBlackBox = new DataBlackBox(Convert.ToInt32(numPrepod));
     dataBlackBox.Show();
     this.Hide();
 }