convert a perl script to c#

See more:

C#

Perl

i wont to convert this script to c# ,any Professional coder can help me !
#Grab the attacker's IP address from the alert file
sub get_alert_ip{
open (ALERT, "alert.ids") or die "Cannot open or read alert file";

while (<alert>)
{
next if (/^\s*$/); #skip blank lines
next if (/^#/); # skip comment lines
if (/\.*\s(\d+\.\d+\.\d+\.\d+)\.*/) #Grab the IP Address
{
$alertip=$1;
print "Alert IP address is $alertip \n";
}
}
close (ALERT);
#Check to see if you got it!
if ($ip eq ""){ print "Could not get the IP address out of the alert
file! \n";}
$alertip;
}
#########
#Compares the new IP address to the IP address I have already
captured
sub compare_ip{
my ($compareip) = @_;
open (COMPARE, "attackers.old") or die "Cannot read the ignore file,
$!\n";
while (<compare>) {
chop;
next if (/^\s*$/); #skip blank lines
next if (/^#/); # skip comment lines
if (/(.*)/)
{
}
}
$alertip=$1;
if ("$alertip" eq "$compareip")
{
print "Somebody old is still attacking \n";
}
else
{ #Send the new IP address to the IPSEC filter subfunction
&ipfilter($compareip);
$tag=1;
}
next;
close (COMPARE);
if ($tag eq 1)
{
system ("echo $compareip >> attackers.old");
}
}