ディレクトリのファイル一覧を取得する

using System;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static void DirectorySearch(string directoryPath, string searchPattern)
        {
            string[] files = Directory.GetFiles(directoryPath, searchPattern);
            foreach (string file in files) Console.WriteLine(file);

            string[] dirs = Directory.GetDirectories(directoryPath);
            foreach (string dir in dirs) DirectorySearch(dir, searchPattern);
        }

        static void Main(string[] args)
        {
            DirectorySearch(@"D:\wwwroot", "*.aspx");
            Console.Read();
        }
    }
}

using System;
using System.IO;
using System.Text.RegularExpressions;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void DirectorySearch(string directoryPath, string searchPattern)
        {
            string[] files = Directory.GetFiles(directoryPath, searchPattern);
            foreach (string file in files) Write(file);

            string[] dirs = Directory.GetDirectories(directoryPath);
            foreach (string dir in dirs) DirectorySearch(dir, searchPattern);
        }

        static void Write(string filePath)
        {
            StreamReader streamReader = new StreamReader(filePath, Encoding.UTF8);
            string targetString = streamReader.ReadToEnd();
            streamReader.Close();

            Regex regex = new Regex(" title=\"(?<text>.*?)\" ", RegexOptions.IgnoreCase | RegexOptions.Singleline);
            Match match = regex.Match(targetString);

            StreamWriter writer = new StreamWriter(@"D:\Test.txt", true);
            writer.WriteLine(Path.GetFileNameWithoutExtension(filePath) + "," + match.Groups["text"].Value.Replace("－", ","));
            writer.Close();
        }

        static void Main(string[] args)
        {
            DirectorySearch(@"D:\wwwroot", "*.aspx");
        }
    }
}