Comparing the number of bytes and the time to create them when using a string or a Binary Formatter

string vs binary

    class Program
    {
        static void Main(string[] args)
        {
            Random _rand = new Random();
            List<Player> players = new List<Player>();
            for (int i = 0; i < 20000; i++)
            {
                players.Add(new Player()
                {
                    Id = i,
                    X = _rand.NextDouble() * _rand.Next(0, 800),
                    Y = _rand.NextDouble() * _rand.Next(0, 480)
                });
            }
            Stopwatch sw = new Stopwatch();


            BinaryFormatter formatter = new BinaryFormatter();
            var stream = new MemoryStream();
            formatter.Serialize(stream, players);
            byte[] bBytes = stream.ToArray();
            sw.Stop();
            Console.WriteLine("Bytes = " + bBytes.Length + " in, " + sw.Elapsed);

            sw.Reset();

            sw.Start();
            string joined = string.Join(",", players);
            byte[] sBytes = Encoding.ASCII.GetBytes(joined);
            sw.Stop();
            Console.WriteLine("String = " + sBytes.Length + " , in " + sw.Elapsed);

            Console.Read();

        }
    }

    [Serializable]
    class Player
    {
        public int Id { get; set; }
        public double X { get; set; }
        public double Y { get; set; }

        public override string ToString()
        {
            return Id + ";" + X + ";" + Y;
        }
    }