md5加密 C#

public String EncryptCode(String message)
    {
        MD5 md5 = new MD5CryptoServiceProvider();
        byte[] result = System.Text.Encoding.Default.GetBytes(message);
        byte[] outStr = md5.ComputeHash(result);
        string md5string = BitConverter.ToString(outStr).Replace("-", "");
        return md5string;
    }