using System;
using System.Text;
using System.Text.RegularExpressions;
public class EntryPoint
{
static void Main( string[] args ) {
// Create regex to search for IP address pattern.
string pattern = @"(?<part1>[01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"(?<part2>[01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"(?<part3>[01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"(?<part4>[01]?\d\d?|2[0-4]\d|25[0-5])";
Regex regex = new Regex( pattern );
Match match = regex.Match( "192.168.169.1" );
MatchEvaluator eval = new MatchEvaluator(EntryPoint.IPReverse );
Console.WriteLine( regex.Replace("192.168.169.1", eval) );
}
static string IPReverse( Match match ) {
Console.WriteLine( match.Groups["part4"] + "." );
Console.WriteLine( match.Groups["part3"] + "." );
Console.WriteLine( match.Groups["part2"] + "." );
Console.WriteLine( match.Groups["part1"] );
return "";
}
}
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