private void ItemChecked(ListItemWrapper w)
{
w.IsSelected = !w.IsSelected;
// (Konrad) Let's update the ItemsCollection because otherwise when output is generated
// the last item selected will be missing.
ItemsCollection.ForEach(x =>
{
if (x.Index == w.Index)
{
x.IsSelected = !w.IsSelected;
}
});
OnNodeModified(true);
}
