using System;
using System.IO;
using System.Security.Cryptography;
 
public class Example19_9
{
    public static void Main()
    {
 
        // Create a new file to work with
        FileStream fsOut = File.Create(@"c:\temp\encrypted.txt");
 
        // Create a new crypto provider
        TripleDESCryptoServiceProvider tdes =
            new TripleDESCryptoServiceProvider();
 
        // Create a cryptostream to encrypt to the filestream
        CryptoStream cs = new CryptoStream(fsOut, tdes.CreateEncryptor(),
            CryptoStreamMode.Write);
 
        // Create a StreamWriter to format the output
        StreamWriter sw = new StreamWriter(cs);
 
        // And write some data
        sw.WriteLine("'Twas brillig, and the slithy toves");
        sw.WriteLine("Did gyre and gimble in the wabe.");
        sw.Flush();
        sw.Close();
 
        // save the key and IV for future use
        FileStream fsKeyOut = File.Create(@"c:\\temp\encrypted.key");
 
        // use a BinaryWriter to write formatted data to the file
        BinaryWriter bw = new BinaryWriter(fsKeyOut);
 
        // write data to the file
        bw.Write( tdes.Key );
        bw.Write( tdes.IV );
 
        // flush and close
        bw.Flush();
        bw.Close();
 
    }
 
}


//csharp/7644