public static int RunTask(NavigationFriendlyPage page, AppTask task)
{
int id = CurrentID++;
Tuple<NavigationFriendlyPage, int, IAsyncAction, AppTask> item = new Tuple<NavigationFriendlyPage, int, IAsyncAction, AppTask>(page, id, ThreadPool.RunAsync(task.GetWorkItemHandler(page.Dispatcher)), task);
return id;
}