C#生成MD5的函数代码

public static string getmd5(string sdatain)
        {
            md5cryptoserviceprovider md5 = new md5cryptoserviceprovider();
            byte[] bytvalue, bythash;
            bytvalue = system.text.encoding.utf8.getbytes(sdatain);
            bythash = md5.computehash(bytvalue);
            md5.clear();
            string stemp = "";
            for (int i = 0; i < bythash.length; i++)
            {
                stemp += bythash[i].tostring("x").padleft(2, '0');
            }
            return stemp.tolower();
        }