void FilterPopup_PopupOpened(object sender, EventArgs args)
{
PivotGroupFilterPopup popup = sender as PivotGroupFilterPopup;
popup.TreeViewMenuItem.TreeElement.TreeView.SortOrder = System.Windows.Forms.SortOrder.None;
}
void FilterPopup_PopupOpening(object sender, System.ComponentModel.CancelEventArgs args)
{
PivotGroupFilterPopup popup = sender as PivotGroupFilterPopup;
popup.TreeViewMenuItem.TreeElement.TreeView.SortOrder = System.Windows.Forms.SortOrder.Ascending;
}
