NavigationService.Navigate Method (Uri)
Navigate asynchronously to content that is specified by a uniform resource identifier (URI).
Assembly: PresentationFramework (in PresentationFramework.dll)
The value of source can be a Web URL or a valid pack URI (see Pack URIs in WPF).
Navigate will navigate to the URI specified by source if the following conditions are true:
If source is a null reference (Nothing in Visual Basic), the existing content (Content) is cleared.
When downloading Web content, you may receive a Web exception (for example, 404: File Not Found). You can handle such exceptions from NavigationFailed.
You can use Navigate to navigate to a content fragment. If the content identified by the URI is the current content, it is not downloaded again.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2