binary serialization c#

using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;

namespace BinarySerializationTest
{
    class Program
    {
        static void Main(string[] args)
        {

            // Serialization of String Object  

            String writeData = "Microsoft .NET Framework 2.0";
            FileStream writeStream = new FileStream("C:\\Object.data", FileMode.Create);
            BinaryFormatter formatter = new BinaryFormatter();
            formatter.Serialize(writeStream, writeData);
            writeStream.Close();

            // Deserialization of String Object

            FileStream readStream = new FileStream("C:\\Object.data", FileMode.Open);
            String readData = (String) formatter.Deserialize(readStream);
            readStream.Close();
            Console.WriteLine(readData);

            Console.Read();
        }
    }
}