private void setElectionDateToolStripMenuItem_Click(object sender, EventArgs e)
 {
     if (_addNew == null)
     {
         _addNew = new FrmAddNewElection {
             MdiParent = this
         };
         _addNew.FormClosed += _addNew_FormClosed;
         _addNew.Show();
         _addNew.StyleManager = StyleManager;
     }
     else
     {
         _addNew.Activate();
         _addNew.WindowState = FormWindowState.Normal;
     }
 }
 private void _addNew_FormClosed(object sender, FormClosedEventArgs e)
 {
     _addNew = null;
 }