鬼の领地

using System;
using System.IO;
 
namespace QuickSearch
{
    class Program
    {
        static string curdir = Directory.GetCurrentDirectory();
        static int lcurdir = curdir.Length + 1;
        static string searchText;
 
        static void Main(string[] args)
        {
            searchText = args[0];
            SearchDir(curdir);
        }
 
        static string filecontent;
 
        static void SearchDir(string path)
        {
            string[] files = Directory.GetFiles(path);
            foreach (string file in files)
            {
                filecontent = File.ReadAllText(file);
                if (filecontent.IndexOf(searchText) > 0)
                    Console.WriteLine(file.Substring(lcurdir));
            }
            string[] dirs = Directory.GetDirectories(path);
            foreach (string dir in dirs)
                SearchDir(dir);
        }
    }
}