File Directory Stream C# Tutorial

using System;
using System.IO;
using System.Security.Cryptography;
class MainClass
{
  public static void Main() 
  {
    FileStream fsOut = File.Create(@"c:\encrypted.txt");
    TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
    CryptoStream cs = new CryptoStream(fsOut, tdes.CreateEncryptor(), CryptoStreamMode.Write);
    StreamWriter sw = new StreamWriter(cs);
    sw.WriteLine("str");
    sw.Flush();
    sw.Close();
    FileStream fsKeyOut = File.Create(@"c:\encrypted.key");
    
    BinaryWriter bw = new BinaryWriter(fsKeyOut);
    bw.Write( tdes.Key );
    bw.Write( tdes.IV );
    bw.Flush();
    bw.Close();
  }
}