System.Security.Cryptography

 

       static void Main(string[] args)
        {
            SymmetricAlgorithm provider = SymmetricAlgorithm.Create("TripleDES");
            provider.Key = Encoding.Default.GetBytes("6HD+Ngi8JoGmDog=");
            provider.IV = Encoding.Default.GetBytes("gi8joCmd");


            ICryptoTransform encryptor = provider.CreateEncryptor();
            string clearData = "This is test";
            Console.WriteLine("Clear Data:" + clearData);
            Stream clearData1 = new MemoryStream(Encoding.Default.GetBytes(clearData));
            Stream encryptedData = new MemoryStream();

            CryptoStream crypoStream = new CryptoStream(encryptedData, encryptor, CryptoStreamMode.Write);
            byte[] buffer = new byte[1024];
            int count = 0;

            while ((count = clearData1.Read(buffer, 0, 1024)) > 0)
            {
                crypoStream.Write(buffer, 0, count);
            }

            crypoStream.FlushFinalBlock();
            encryptedData.Position = 0;
            byte[] encryptedDataArray = new Byte[encryptedData.Length];
            encryptedData.Read(encryptedDataArray, 0, encryptedDataArray.Length);
            Console.WriteLine("Encrypted data:"+Encoding.Default.GetString(encryptedDataArray ));
            Console.ReadLine();
        }