Allows calling Flickr.NET (http://flickrnet.codeplex.com/) async APIs using the C# 5 await syntax.

FlickrNetAsync.cs

private static Task<T> DoAsync<T>(Action<Action<FlickrNet.FlickrResult<T>>> begin) {
	var tcs = new TaskCompletionSource<T>();
	begin(result => {
		if (result.HasError) {
			tcs.SetException(result.Error);
		} else {
			tcs.SetResult(result.Result);
		}
	});

	return tcs.Task;
}

private async void ConnectFlickrButton_Click(object sender, RoutedEventArgs e) {
	var requestToken = await DoAsync<FlickrNet.OAuthRequestToken>(
		cb => flickr.OAuthGetRequestTokenAsync("oob", cb));
	string url = flickr.OAuthCalculateAuthorizationUrl(requestToken.Token, FlickrNet.AuthLevel.Write);
	Process.Start(url);
}