public virtual Task GetLowPriorityWorkAuthorizationAsync()
{
// Low priority work differs in a few ways:
// 1) high priority work is always completed first
// 2) low priority work does not use queued-up auth tokens
TaskCompletionSource <byte> tcs = new TaskCompletionSource <byte>();
// this queue is used internally by our timer
Queue.AddLow(tcs);
return(tcs.Task);
}
