The Tower Arena Player class implementation

    class Player {
        private int exp, trophies, money;
        public int Experience {
            get {
                return exp;
            } set {
                exp = value;
                SaveData ();
            }
        }
        public int Trophies {
            get {
                return trophies;
            }
            set {
                trophies = value;
                SaveData ();
            }
        }
        public int Money {
            get {
                return money;
            }
            set {
                money = value;
                SaveData ();
            }
        }
        public string Username { get; }
        public int Id { get; }
        public void SaveData () {
            File.WriteAllLines ("players/" + Username + ".txt", new string[] { exp.ToString (), trophies.ToString (), money.ToString () });
        }
        public static Player FromId (IEnumerable<Player> players, int id) {
            foreach (Player player in players) if (player.Id == id) return player;
            return null; // So all code paths return a value
        }
        public static Player FromUsername (IEnumerable<Player> players, string username) {
            foreach (Player player in players) if (player.Username == username) return player;
            return null; // So all code paths return a value
        }
        public Player (Message message) {
            switch (message.Type) {
                case "init":
                    Id = message.GetInt (5);
                    Username = message.GetString (13);
                    break;
                case "add":
                    Id = message.GetInt (0);
                    Username = message.GetString (1);
                    break;
            }
            bool fromConfig = false;
            exp = -1;
            trophies = -1;
            money = -1;
            if (File.Exists ("players/" + Username + ".txt")) {
                string[] content = File.ReadAllLines ("players/" + Username + ".txt");
                if (content.Length == 3) {
                    int.TryParse (content[0], out exp);
                    int.TryParse (content[1], out trophies);
                    int.TryParse (content[2], out money);
                    if (exp != -1 && trophies != -1 && money != -1) fromConfig = true;
                }
            }
            if (!fromConfig) {
                exp = 0;
                trophies = 0;
                money = 0;
                SaveData ();
            }
        }
    }