private void найтиXЕслиИзвестнаДлинаВектораToolStripMenuItem_Click(object sender, EventArgs e)
        {
            f2_5_1 form = new f2_5_1();

            form.Show();
        }
 private void найтиXЕслиИзвестнаДлинаВектораToolStripMenuItem_Click(object sender, EventArgs e)
 {
     f2_5_1 form = new f2_5_1();
     form.Show();
 }