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