In this chapter, you learned how to create a TreeView web part to provide an enhanced user experience when navigating complex document libraries. The TreeView web part does for document libraries what the SQL and XML web parts do for structured data: It’s a Swiss army knife for formatting and navigating document libraries. Although there are other TreeView web parts available on the market today, having the source code means you can add features as required. One useful enhancement that we haven’t discussed here is the ability to connect this web part to a standard document library web part, thus using the TreeView for folder navigation. Another is to add context menus to each element, similar to those available from the document library list page.