C#md5编码

    private static string tottt(string s)
    {
        byte[] source = md5.ComputeHash(Encoding.UTF8.GetBytes(s));
        StringBuilder sBuilder = new StringBuilder();
        for (int i = 0; i < source.Length; i++)
        {
            sBuilder.Append(source[i].ToString("x2"));
        }
        return sBuilder.ToString();
    }
    private static string tottt2(string s)
    {
        byte[] source = md52.ComputeHash(Encoding.UTF8.GetBytes(s));
        StringBuilder sBuilder = new StringBuilder();
        for (int i = 0; i < source.Length; i++)
        {
            sBuilder.Append(source[i].ToString("x2"));
        }
        return sBuilder.ToString();
    }

    private static string tottt3(string s)
    {
        return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(s, "MD5").ToLower();
    }

　测试在使用Encoding.UTF8时，三个方法计算结果是一致的