キルミーベイベーアイコンダウンローダー

Program.cs

using System;
using System.Linq;
using System.Net;
using System.Text.RegularExpressions;

namespace KillmebabyIconDownloader
{
    class Program
    {
        static void Main(string[] args)
        {
            var baseUri = new Uri("http://killmebaby.tv/special_icon.html");

            using (var wc = new WebClient())
            {
                var response = wc.DownloadString(baseUri);
                var images = Regex.Matches(response, @"<td><img src=""(images/icon/icon/(\d\d_\d\d\d\.png))"" width=""128"" height=""128""></td>")
                    .Cast<Match>()
                    .Select(m => Tuple.Create(new Uri(baseUri, m.Groups[1].ToString()), m.Groups[2].ToString()));

                foreach (var img in images)
                {
                    Console.WriteLine(img.Item1);
                    wc.DownloadFile(img.Item1, img.Item2);
                }
            }

            Console.ReadKey();
        }
    }
}