Convert php code to C#

class Whois

{

// For the full list of TLDs/Whois servers see http://www.iana.org/domains/root/db/ and http://www.whois365.com/en/listtld/

function LookupDomain($domain)

{

$whoisservers = array(

"ac" =>"whois.nic.ac",

"ae" =>"whois.nic.ae",

"aero"=>"whois.aero",

"af" =>"whois.nic.af",

"ag" =>"whois.nic.ag",

"al" =>"whois.ripe.net",

"am" =>"whois.amnic.net",

"arpa" =>"whois.iana.org",

"as" =>"whois.nic.as",

"asia" =>"whois.nic.asia",

"at" =>"whois.nic.at",

"au" =>"whois.aunic.net",

"az" =>"whois.ripe.net",

"ba" =>"whois.ripe.net",

"be" =>"whois.dns.be",

"bg" =>"whois.register.bg",

"bi" =>"whois.nic.bi",

"biz" =>"whois.biz",

"bj" =>"whois.nic.bj",

"br" =>"whois.registro.br",

"bt" =>"whois.netnames.net",

"by" =>"whois.ripe.net",

"bz" =>"whois.belizenic.bz",

"ca" =>"whois.cira.ca",

"cat" =>"whois.cat",

"cc" =>"whois.nic.cc",

"cd" =>"whois.nic.cd",

"ch" =>"whois.nic.ch",

"ci" =>"whois.nic.ci",

"ck" =>"whois.nic.ck",

"cl" =>"whois.nic.cl",

"cn" =>"whois.cnnic.net.cn",

"com" =>"whois.verisign-grs.com",

"coop" =>"whois.nic.coop",

"cx" =>"whois.nic.cx",

"cy" =>"whois.ripe.net",

"cz" =>"whois.nic.cz",

"de" =>"whois.denic.de",

"dk" =>"whois.dk-hostmaster.dk",

"dm" =>"whois.nic.cx",

"dz" =>"whois.ripe.net",

"edu" =>"whois.educause.edu",

"ee" =>"whois.eenet.ee",

"eg" =>"whois.ripe.net",

"es" =>"whois.ripe.net",

"eu" =>"whois.eu",

"fi" =>"whois.ficora.fi",

"fo" =>"whois.ripe.net",

"fr" =>"whois.nic.fr",

"gb" =>"whois.ripe.net",

"gd" =>"whois.adamsnames.com",

"ge" =>"whois.ripe.net",

"gg" =>"whois.channelisles.net",

"gi" =>"whois2.afilias-grs.net",

"gl" =>"whois.ripe.net",

"gm" =>"whois.ripe.net",

"gov" =>"whois.nic.gov",

"gr" =>"whois.ripe.net",

"gs" =>"whois.nic.gs",

"gw" =>"whois.nic.gw",

"gy" =>"whois.registry.gy",

"hk" =>"whois.hkirc.hk",

"hm" =>"whois.registry.hm",

"hn" =>"whois2.afilias-grs.net",

"hr" =>"whois.ripe.net",

"hu" =>"whois.nic.hu",

"ie" =>"whois.domainregistry.ie",

"il" =>"whois.isoc.org.il",

"in" =>"whois.inregistry.net",

"info" =>"whois.afilias.net",

"int" =>"whois.iana.org",

"io" =>"whois.nic.io",

"iq" =>"vrx.net",

"ir" =>"whois.nic.ir",

"is" =>"whois.isnic.is",

"it" =>"whois.nic.it",

"je" =>"whois.channelisles.net",

"jobs" =>"jobswhois.verisign-grs.com",

"jp" =>"whois.jprs.jp",

"ke" =>"whois.kenic.or.ke",

"kg" =>"www.domain.kg",

"ki" =>"whois.nic.ki",

"kr" =>"whois.nic.or.kr",

"kz" =>"whois.nic.kz",

"la" =>"whois.nic.la",

"li" =>"whois.nic.li",

"lt" =>"whois.domreg.lt",

"lu" =>"whois.dns.lu",

"lv" =>"whois.nic.lv",

"ly" =>"whois.nic.ly",

"ma" =>"whois.iam.net.ma",

"mc" =>"whois.ripe.net",

"md" =>"whois.ripe.net",

"me" =>"whois.meregistry.net",

"mg" =>"whois.nic.mg",

"mil" =>"whois.nic.mil",

"mn" =>"whois.nic.mn",

"mobi" =>"whois.dotmobiregistry.net",

"ms" =>"whois.adamsnames.tc",

"mt" =>"whois.ripe.net",

"mu" =>"whois.nic.mu",

"museum" =>"whois.museum",

"mx" =>"whois.nic.mx",

"my" =>"whois.mynic.net.my",

"na" =>"whois.na-nic.com.na",

"name" =>"whois.nic.name",

"net" =>"whois.verisign-grs.net",

"nf" =>"whois.nic.nf",

"nl" =>"whois.domain-registry.nl",

"no" =>"whois.norid.no",

"nu" =>"whois.nic.nu",

"nz" =>"whois.srs.net.nz",

"org" =>"whois.pir.org",

"pl" =>"whois.dns.pl",

"pm" =>"whois.nic.pm",

"pr" =>"whois.uprr.pr",

"pro" =>"whois.registrypro.pro",

"pt" =>"whois.dns.pt",

"re" =>"whois.nic.re",

"ro" =>"whois.rotld.ro",

"ru" =>"whois.ripn.net",

"sa" =>"whois.nic.net.sa",

"sb" =>"whois.nic.net.sb",

"sc" =>"whois2.afilias-grs.net",

"se" =>"whois.iis.se",

"sg" =>"whois.nic.net.sg",

"sh" =>"whois.nic.sh",

"si" =>"whois.arnes.si",

"sk" =>"whois.ripe.net",

"sm" =>"whois.ripe.net",

"st" =>"whois.nic.st",

"su" =>"whois.ripn.net",

"tc" =>"whois.adamsnames.tc",

"tel" =>"whois.nic.tel",

"tf" =>"whois.nic.tf",

"th" =>"whois.thnic.net",

"tj" =>"whois.nic.tj",

"tk" =>"whois.dot.tk",

"tl" =>"whois.nic.tl",

"tm" =>"whois.nic.tm",

"tn" =>"whois.ripe.net",

"to" =>"whois.tonic.to",

"tp" =>"whois.nic.tl",

"tr" =>"whois.nic.tr",

"travel" =>"whois.nic.travel",

"tv" => "tvwhois.verisign-grs.com",

"tw" =>"whois.twnic.net.tw",

"ua" =>"whois.net.ua",

"ug" =>"whois.co.ug",

"uk" =>"whois.nic.uk",

"us" =>"whois.nic.us",

"uy" =>"nic.uy",

"uz" =>"whois.cctld.uz",

"va" =>"whois.ripe.net",

"vc" =>"whois2.afilias-grs.net",

"ve" =>"whois.nic.ve",

"vg" =>"whois.adamsnames.tc",

"wf" =>"whois.nic.wf",

"ws" =>"whois.website.ws",

"yt" =>"whois.nic.yt",

"qa" =>"whois.registry.qa", // Qatar

"edu.qa" =>"whois.registry.qa", // Qatar

//"qa" =>"whois-check.registry.qa", // Qatar

//"com.qa" =>"whois-check.registry.qa", // Qatar

//"net.qa" =>"whois-check.registry.qa", // Qatar

//"name.qa" =>"whois-check.registry.qa", // Qatar

//"xn--wgbl6a"=>"whois-check.registry.qa", // Qatar

"com.qa" =>"whois.registry.qa", // Qatar

"net.qa" =>"whois.registry.qa", // Qatar

"name.qa" =>"whois.registry.qa", // Qatar

"xn--wgbl6a"=>"whois.registry.qa",// Qatar

"yt" =>"whois.afilias.info",

"uk" =>"whois.nic.uk",

"yu" =>"whois.ripe.net"

);

//$domain_parts = explode(".", $domain);

//$tld = strtolower(array_pop($domain_parts));

$domain_parts = explode(".", $domain, 2);

$_tld = array_pop($domain_parts);

if($_tld == '???')

{

$tld = 'xn--wgbl6a';

}else 

{

$tld = strtolower($_tld);

}

$whoisserver = $whoisservers[$tld];

//pr($whoisserver);exit;

if(!$whoisserver) 

{

return "Error: No appropriate Whois server found for $domain domain!";

}

$result = $this->QueryWhoisServer($whoisserver, $domain);

if(!$result) 

{

return "Error: No results retrieved from Whois server server for $domain domain!";

}else 

{

while(strpos($result, "Whois Server:") !== FALSE)

{

preg_match("/Whois Server: (.*)/", $result, $matches);

$secondary = $matches[1];

if($secondary) 

{

$result = $this->QueryWhoisServer($secondary, $domain);

$whoisserver = $secondary;

}

}

}

return "$domain domain lookup results from Whois Server server:\n\n" . $result;

}

function LookupIP($ip) 

{

$whoisservers = array(

//"whois.afrinic.net", // Africa - returns timeout error :-(

"whois.lacnic.net", // Latin America and Caribbean - returns data for ALL locations worldwide :-)

"whois.apnic.net", // Asia/Pacific only

"whois.arin.net", // North America only

"whois.ripe.net" // Europe, Middle East and Central Asia only

);

$results = array();

foreach($whoisservers as $whoisserver) 

{

$result = $this->QueryWhoisServer($whoisserver, $ip);

if($result && !in_array($result, $results)) 

{

$results[$whoisserver]= $result;

}

}

$res = "RESULTS FOUND: " . count($results);

foreach($results as $whoisserver=>$result) 

{

$res .= "\n\n-------------\nLookup results for $ip from $whoisserver server:\n\n$result";

}

return $res;

}

function ValidateIP($ip) 

{

/*$ipnums = explode(".", $ip);

if(count($ipnums) != 4) 

{

return false;

}

foreach($ipnums as $ipnum) 

{

if(!is_numeric($ipnum) || ($ipnum > 255)) 

{

return false;

}

}

return $ip;*/

return true;

}

function ValidateDomain($domain) 

{

/*if(!preg_match("/^([-a-z0-9]{2,100})\.([a-z\.]{2,8})$/i", $domain)) 

{

return false;

}

return $domain;*/

return true;

}

function QueryWhoisServer($whoisserver, $domain) 

{

$port = 43;

$timeout = 10;

$fp = @fsockopen($whoisserver, $port, $errno, $errstr, $timeout) or die("Socket Error " . $errno . " - " . $errstr);

if($whoisserver == "whois.verisign-grs.com") $domain = "=".$domain; // whois.verisign-grs.com requires the equals sign ("=") or it returns any result containing the searched string.

fputs($fp, $domain . "\r\n");

$out = "";

while(!feof($fp))

{

$out .= fgets($fp);

}

fclose($fp);

$res = "";

if((strpos(strtolower($out), "error") === FALSE) && (strpos(strtolower($out), "not allocated") === FALSE)) 

{

$rows = explode("\n", $out);

foreach($rows as $row) 

{

$row = trim($row);

if(($row != '') && ($row{0} != '#') && ($row{0} != '%')) 

{

$res .= $row."\n";

}

}

}

return $res;

}

}

?>