After doing so, each of the five page's markup should contain just one Content control.
To add the file, right-click on the project name in Solution Explorer and choose Add New Item.
From the dialog box, opt to add a file of type Site Map named to the Project's Root Directory (Click to view full-size image) The XML site map file defines the website's structure as a hierarchy.
As page developers, creating the navigational user interface is only half of the story.
We also need some means to define the site's logical structure in a maintainable and updateable fashion.
As new pages are added or existing pages removed, we want to be able to update a single source - the site map - and have those modifications reflected across the site's navigational user interface.