Perl script logic converted to C# -

i have perl script need convert c#.

but have hit speedbump.

the perl script:

use math::basecnv; use math::basecnv dig; use xml::simple; use lwp::simple;  dig('url'); # select right alphabet base64 $parser = new xml::simple; $url = 'http://10.0.2.128/api.xml'; $content = $url or die "unable $url\n"; $data = $parser->xmlin($content); $stringdata=$data->{datafield};  $decvalue = cnv('a'.substr($stringdata,3,54),64,10); dig('hex'); $hexvalue = cnv($decvalue,10,16); 

the value of $stringdata is ws=3lcobgcaxjqaadljiqeaaag2fdadiaab7qhka6eyapqga1cc8gaa4e

length: 57

the value of $decvalue is

29461891743732702623135632717213292230507524331718660652410396996938709350973448271678550990392836 

length: 98

and value of $hexvalue is

dcb08e06009ac634000039632101000001b6143003880001ed01ca03a13200f420035702f20000e04 

length: 81

my issue cant same $decvalue , $hexvalue when using c#. have searched google dry , not close getting these values.

so greate if know way decode these values in c#?

thanks in advance :)