public static void WaitForQueueToEmpty(BackgroundHttpRequester requester)
{
var time = new Stopwatch();
time.Start();
while (requester.QueueCount != 0 && time.Elapsed < timeout)
Task.Delay(TimeSpan.FromMilliseconds(100)).Wait();
}
/// <summary>
/// Start the requester with any unsent URIs from the last application run.
/// </summary>
/// <param name="uploadInterval">How often to send URIs to analytics.</param>
/// <returns>Task that completes when the requester is ready.</returns>
private static async Task StartRequesterAsync(TimeSpan uploadInterval)
{
requester = new BackgroundHttpRequester(PreprocessHttpRequest);
var previousRequests = await LocalFolderContractSerializer<List<Uri>>.RestoreAsync(RequestQueueFileName);
requester.Start(uploadInterval, previousRequests);
}