md5 c# unicode 互换

                $input=‘中国‘;
                $result= md5($input);
                $temp=iconv("UTF-8", "UTF16LE", $input); 
                echo md5($temp)               

     var resultUnicode32 = GetMD5(input, Encoding.Unicode, 32);

 public static String GetMD5(string s, Encoding charset, int bit)
        {
            String md5Value = string.Empty;
            if ((bit == 0x10) || (bit == 0x20))
            {
                byte[] t = new MD5CryptoServiceProvider().ComputeHash(charset.GetBytes(s));
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < t.Length; i++)
                {
                    sb.Append(t[i].ToString("x").PadLeft(2, ‘0‘));
                }
                md5Value = sb.ToString().ToLower();
            }
            if (bit == 0x10)
            {
                return md5Value.Substring(8, 0x10);
            }

            return md5Value;
        }