static private void RefreshIsSubSelected(FileSystemNode node)
{
FolderNode folder = node as FolderNode;
if (node == null)
{
return;
}
node.IsSubSelected = folder.Children.Where(n => n.Value.IsSubSelected || n.Value.IsSelected).Count() > 0; //gotsta admit, the linq extensions sure do come in amazingly handy
node.SetIsExcluded(); //must do this after setting IsSubSelected since it depends on that property
RefreshIsSubSelected(folder.Parent);
}