One of the major new features in ASP.NET 2.0 is data-driven site navigation. You start by providing an XML site map detailing your site's structure. Then you add a SiteMapDataSource control to the page and bind it to a TreeView or Menu control to produce a navigation UI. The SiteMapDataSource control reads the XML site map and provides the data to the TreeView or Menu as well as to any SiteMapPath controls also present in the page
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