protected override void OnAdd()
{
NSOpenPanel panel = NSOpenPanel.OpenPanel;
panel.CanChooseFiles = false;
panel.CanChooseDirectories = true;
panel.AllowsMultipleSelection = false;
panel.BeginSheetForDirectoryFileModalForWindowModalDelegateDidEndSelectorContextInfo(new NSString(""), new NSString(iOption.Description), iView.Window, ChangeDidEnd, IntPtr.Zero);
}
protected override void ActionEventChange(Id aSender)
{
NSOpenPanel panel = NSOpenPanel.OpenPanel;
panel.CanChooseFiles = false;
panel.CanChooseDirectories = true;
panel.AllowsMultipleSelection = false;
panel.BeginSheetForDirectoryFileModalForWindowModalDelegateDidEndSelectorContextInfo(new NSString(iOption.Value), new NSString("Untitled"), iView.Window, ChangeDidEnd, IntPtr.Zero);
}