class Program
    {
        static void Main(string[] args)
        {
            Settings s = new Settings();
            s.Setting1 = 1.45;
            s.Setting2 = 5.04;

            using (StreamWriter sw = new StreamWriter("test.txt"))
            {
                sw.WriteLine(System.Text.Encoding.Default.GetString(Serialize(s)));
            }
        }

        public static byte[] Serialize(object anySerializableObject)
        {
            using (var memoryStream = new MemoryStream())
            {
                (new BinaryFormatter()).Serialize(memoryStream, anySerializableObject);
                return memoryStream.ToArray();
            }
        }
    }

    [SerializableAttribute]
    public class Settings
    {
        public double Setting1;
        public double Setting2;
    }


/*
OUTPUT

 
   ÿÿÿÿ
          JConsoleApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
   ConsoleApplication1.Settings   Setting1Setting2     333333÷?)\Âõ(@

*/