protected override void OnFormClosing(FormClosingEventArgs e)
{
_scannerCommon.OnFormClosing(e);
SearchFilter.TextChanged -= SearchFilter_TextChanged;
SortOrderIcon.Click -= SortOrderIcon_Click;
removeWatchdogs();
PanelManager.Instance.EvtScannerShow -= Instance_EvtScannerShow;
PanelManager.Instance.EvtScannerClosed -= Instance_EvtScannerClosed;
_keyboardActuator.EvtKeyPress -= _keyboardActuator_EvtKeyPress;
base.OnFormClosing(e);
}