MD5加密

  public static string Cryptograohy(string text, string mode)
        {
            char[] arrChar = text.ToCharArray();
            byte[] arrByte = new byte[arrChar.Length];

            for (var i = 0; i <= arrByte.Length - 1; i++)
                arrByte[i] = Convert.ToByte(arrChar[i]);

            var objMD5 = new MD5CryptoServiceProvider();

            byte[] arrHashOutput = objMD5.ComputeHash(arrByte);
            return BitConverter.ToString(arrHashOutput).Replace("-", String.Empty);

        }