public static string Encrypt(string strToEncrypt, string strKey)

{

    try

    {

        TripleDESCryptoServiceProvider objDESCrypto =

                          new TripleDESCryptoServiceProvider();

        MD5CryptoServiceProvider objHashMD5 = new MD5CryptoServiceProvider();

        byte[] byteHash, byteBuff;

        string strTempKey = strKey;

        byteHash = objHashMD5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(strTempKey));

        objHashMD5 = null;

        objDESCrypto.Key = byteHash;

        objDESCrypto.Mode = CipherMode.ECB;

        byteBuff = ASCIIEncoding.ASCII.GetBytes(strToEncrypt);

        return Convert.ToBase64String(objDESCrypto.CreateEncryptor().

                          TransformFinalBlock(byteBuff, 0, byteBuff.Length));

    }

    catch (Exception ex)

    {

        return "Wrong Input. " + ex.Message;

    }

}