private void OnTimedEvent(object sender, ElapsedEventArgs e)
 {
     Second++;
     Enter_B.Invoke((MethodInvoker) delegate()
     {
         Enter_B.Text = "Отмена(" + (5 - Second) + ")";
     });
 }
 private void Autorization_F_KeyDown(object sender, KeyEventArgs e)
 {
     if (e.KeyCode == Keys.Enter)
     {
         Enter_B.PerformClick();
     }
     else if (e.KeyCode == Keys.Escape)
     {
         Cancel_B.PerformClick();
     }
 }