WPF TreeView - How to scroll so expanded branch is visible

Question

When I expand items in my treeview so that scrolling is necessary, a scrollbar appears. However, it doesn\'t scroll down for the newly expanded branch of items - they get cr

Answer 1

Thanks to itowlson's answer, here's the expanded event handler code that works for both of my trees

private static void Tree_Expanded(object sender, RoutedEventArgs e)
{
    // ignore checking, assume original source is treeviewitem
    var treeViewItem = (TreeViewItem)e.OriginalSource;

    var count = VisualTreeHelper.GetChildrenCount(treeViewItem);

    for (int i = count - 1; i >= 0; --i)
    {
        var childItem = VisualTreeHelper.GetChild(treeViewItem, i);
        ((FrameworkElement)childItem).BringIntoView();
    }

    // do NOT call BringIntoView on the actual treeviewitem - this negates everything
    //treeViewItem.BringIntoView();
}