private void CreateAchievementNoteCommandExecute(AchievementNoteViewModel achievementNoteViewModel)
 {
     if (!AchievementNotes.Contains(achievementNoteViewModel))
     {
         AchievementNotes.Add(achievementNoteViewModel);
     }
     UpdateAchievementCommandExecute();
 }
 private void DeleteAchievementNoteCommandExecute(AchievementNoteViewModel noteViewModel)
 {
     if (AchievementNotes.Contains(noteViewModel))
     {
         AchievementNotes.Remove(noteViewModel);
     }
     UpdateAchievementCommandExecute();
 }