求c#大神帮我改个程序
function GetGB2312String($name)
{
$tostr = "";
for($i=0;$i<strlen($name);$i++)
{
$curbin = ord(substr($name,$i,1));
if($curbin < 0x80)
{
$tostr .= substr($name,$i,1);
}elseif($curbin < bindec("11000000")){
$str = substr($name,$i,1);
$tostr .= "&#".ord($str).";";
}elseif($curbin < bindec("11100000")){
$str = substr($name,$i,2);
$tostr .= "&#".GetUnicodeChar($str).";";
$i += 1;
}elseif($curbin < bindec("11110000")){
$str = substr($name,$i,3);
$gstr= iconv("UTF-8","GB2312",$str);
if(!$gstr)
{
$tostr .= "&#".GetUnicodeChar($str).";";
}else{
$tostr .= $gstr;
}
$i += 2;
}elseif($curbin < bindec("11111000")){
$str = substr($name,$i,4);
$tostr .= "&#".GetUnicodeChar($str).";";
$i += 3;
}elseif($curbin < bindec("11111100")){
$str = substr($name,$i,5);
$tostr .= "&#".GetUnicodeChar($str).";";
$i += 4;
}else{
$str = substr($name,$i,6);
$tostr .= "&#".GetUnicodeChar($str).";";
$i += 5;
}
}
return $tostr;
}
这个程序怎么改成c#程序
function GetUnicodeChar($str)
{
$temp = "";
for($i=0;$i<strlen($str);$i++)
{
$x = decbin(ord(substr($str,$i,1)));
if($i == 0)
{
$s = strlen($str)+1;
$temp .= substr($x,$s,8-$s);
}else{
$temp .= substr($x,2,6);
}
}
return bindec($temp);
}