public override void Prepare(MvxObservableCollection <Challenge> challenges) { try { base.Prepare(); TotalChallenges = challenges.Count; CountChallengesCompleted = challenges.Count(x => x.IsCompletedChallenge); ChallengeList = new MvxObservableCollection <Challenge>(challenges); } catch (Exception ex) { Debug.WriteLine(ex.Message); } return; }