[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Assembly: Microsoft.Phone (in Microsoft.Phone.dll)
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In the Windows Phone 8.1 WebBrowser control, the event has changed to be an asynchronous event. It was previously a synchronous event in Windows Phone 8 Silverlight apps. If a Windows Phone 8 Silverlight app is run on Windows Phone 8.1, the behavior change in from synchronous to asynchronous will cause apps to execute differently.