Thank you for your question.
As the name implies, the Telerik.Windows.BackgroundAgentTools is supposed to be referenced in a Background Agent. It can be useful to update a tile periodically by using the LiveTileHelper. We don't have dedicated documentation for the assembly but we are planning to include information about it in the documentation of LiveTileHelper. To get a better idea of how to use this control with the new assembly you can read this blog post
, which explains in details how to create an application that updates the tile created by LiveTileHelper in a Background Agent and includes a sample application.
Let me know if you need additional assistance.
the Telerik team
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