https://learn.microsoft.com/en-us/uwp/api/windows.networking.backgroundtransfer.backgrounduploader?view=winrt-28000&redirectedfrom=MSDN
BackgroundUploader Class (Windows.Networking.BackgroundTransfer) - Windows apps | Microsoft Learn
Used to configure upload prior to the actual creation of the upload operation using CreateUpload. For an overview of Background Transfer capabilities, see...
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