private void button5_Click(object sender, EventArgs e)
 {
     //InfoTest newtest = new InfoTest(Convert.ToInt32(numPrepod));
     //newtest.Show();
     //this.Hide();
     TestWorkStart testwork = new TestWorkStart(Convert.ToInt32(numPrepod));
     testwork.Show();
     this.Hide();
 }
 private void toolStripButton2_Click(object sender, EventArgs e)
 {
     TestWorkStart workStart= new TestWorkStart(NumTeacher);
     workStart.Show();
     this.Hide();
 }
 private void выходToolStripMenuItem_Click(object sender, EventArgs e)
 {
     TestWorkStart str = new TestWorkStart(numTeacher);
     this.Hide();
     str.Show();
 }