using System;
using System.IO;
using System.Security.Cryptography;
class MainClass
{
public static void Main()
{
TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
FileStream fsKeyIn = File.OpenRead(@"c:\encrypted.key");
BinaryReader br = new BinaryReader(fsKeyIn);
tdes.Key = br.ReadBytes(24);
tdes.IV = br.ReadBytes(8);
FileStream fsIn = File.OpenRead(@"c:\encrypted.txt");
CryptoStream cs = new CryptoStream(fsIn, tdes.CreateDecryptor(),CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cs);
Console.WriteLine(sr.ReadToEnd());
sr.Close();
}
}