public List<FavoriteList> GetFavorites(string format, string apiToken, string apiTokenSecret)
{
SinaApiService myApi = new SinaApiService();
string myResult = myApi.GetFavorites(format, consumerKey, consumerKeySecret, apiToken, apiTokenSecret);
XDocument doc = XDocument.Parse(myResult);
return FavoriteList.Parse(doc.Root);
}