Gets or sets the beacon API URL used for indicating that the page is terminated by the client and no more requests are to be expected by this page request.
This method is for analytics and diagnostics that send data to a server before the browser document/ web page
is unloaded, where sending the data any sooner may miss some possible data collection. For example,
which link the user clicked before navigating away and unloading the page.
Requirements
Target Platforms: 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