private void ManageShiftSelection(MultiSelectTreeViewItem viewItem)
{
if (_lastClickedItem == null)
{
_lastClickedItem = Items[0] as MultiSelectTreeViewItem;
}
if (_lastClickedItem == null)
{
return;
}
if (_lastClickedItem.ParentMultiSelectTreeView == null)
{
return; // seems to be a disconnected item
}
MultiSelectTreeViewItem.SelectAllNodesInbetween(_lastClickedItem, viewItem, true);
}
