static FolderTreeView()
{
folderTreeSourceTargetList.AddTextTargets((uint)DragDropTargets.TargetType.PlainText);
folderTreeSourceTargetList.AddUriTargets((uint)DragDropTargets.TargetType.UriList);
folderTreeSourceTargetList.AddTargetEntry(DragDropTargets.UriQueryEntry);
}
