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Categories / C# Tutorial / File Directory Stream

 

Encrypting a file

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();   } }