private void OnCollectionChanged_Event(object sender, QueueCollectionChangedEventArgs <DownloadObject> e)
{
if (e.EnqueuedItems != null)
{
EnqueuedItem = e.EnqueuedItems[0];
}
}
private void OnQueueChanged_Event(object sender, QueueCollectionChangedEventArgs <DownloadObject> e)
{
Assert.True(e.EnqueuedItems != null || e.DequeuedItems != null);
_eventFired = true;
}