public void LoadScores(string leaderboardId, Action <IScore[]> callback)
 {
     LoadScores(leaderboardId, LeaderboardStart.PlayerCentered, mClient.LeaderboardMaxResults(), LeaderboardCollection.Public, LeaderboardTimeSpan.AllTime, delegate(LeaderboardScoreData scoreData)
     {
         callback(scoreData.Scores);
     });
 }