public static Sprite GetAvatar(User u)
        {
            Sprite sprite = (Sprite)null;

            if (!UIInviteMenu.avatars.TryGetValue(u.id, out sprite))
            {
                sprite = UIInviteMenu.PrepareSprite(u);
            }
            return(sprite);
        }
 public static void Initialize()
 {
     if (!Steam.IsInitialized())
     {
         return;
     }
     foreach (User friend in Steam.friends)
     {
         UIInviteMenu.avatars[friend.id] = UIInviteMenu.PrepareSprite(friend);
     }
 }