private void создатьДеревоToolStripMenuItem_Click_1(object sender, EventArgs e)
 {
     newTree nT = new newTree(numPrepod);
     nT.Show();
 }
 private void менюToolStripMenuItem_Click(object sender, EventArgs e)
 {
     newTree nT = new newTree(numPrepod);
     nT.Show();
 }