Asynchronous loading of a resource with resource names coming from external resource

gistfile1.cs

        protected void LoadFeedByName(string name, OpenReadCompletedEventHandler handler)
        {
            WebClient client = new WebClient();
            client.OpenReadCompleted += handler;

            if (App.UriProvider.IsFeedsAvailable)
            {
                client.OpenReadAsync(App.UriProvider.UriForName(name));
            }
            else
            {
                App.UriProvider.FeedUrisAvailable +=
                    new FeedUriAvalableEventHandler(
                    (object sender, EventArgs args) =>
                    {
                        System.Windows.Deployment.Current.Dispatcher.BeginInvoke(() =>
                        {
                            client.OpenReadAsync(App.UriProvider.UriForName(name));
                        });
                    });
            }
        }