Navigation for ASP.NET Web Forms manages movement and data passing between ASPX pages in a unit-testable manner. There is no client-side logic, so it works in all browsers, and no server-side cache, so it works with the browser back button.

Comprehensive documentation and sample code can be found under the Documentation tab
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• New - Added support for new 4.5 data binding through the new NavigationData Attribute and ValueProvider classes
• New - Added HTML5 History support to history navigation
• New - Added defaultTypes for State NavigationData, allowing removal of URL separators
• New - Added NavigationDataTrigger so an UpdatePanel can be refreshed when a NavigationData item changes
• New - Added HistoryNavigator Control to handle history navigation
• New - Added ViewSwitcher Control to allow switching between mobile and desktop views
• New - FragmentIdentifier added to NavigationHyperLink, allowing URL # anchors to be specified

• Change - Routes registered automatically using PreApplicationStartMethod attribute, so calls to AddStateRoutes must be removed
• Change - Pager removes totalRowCount from StateContext Data to avoid it being passed during navigation
• Change - Default URL separators changed. To revert back to old separators configure the originalUrlSeparators setting to true

• Fix - NavigationDataParameter no longer throws exception if ControlID set but key returned as blank
• Fix - Added Href in DesignMode so that NavigationHyperLink is styled correctly in the design view
• Fix - Changed Sorter to render supplied Id attribute
• Fix - NavigationData item with key containing a crumb trail separator no longer throws exception