C# - Musik-Playlisten erstellen

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

namespace DoenaSoft.Playlist
{
    //Warum nicht einfach "dir *.mp3 /b > !playlist.m3u"?
    //Weil der nicht mit deutschen Umlauten umgehen kann.
    public static class Playlist
    {
        public static void Main(String[] args)
        {
            DirectoryInfo di;
            FileInfo[] fis;
            StringBuilder output;

            if ((args == null) || (args.Length != 1) || (Directory.Exists(args[0]) == false))
            {
                Console.WriteLine("No path provided. Using current directory.");
                args = new String[] { "." };
            }
            di = new DirectoryInfo(args[0]);
            Console.WriteLine("Processing \"" + di.FullName + "\"");
            fis = di.GetFiles("*.mp3", SearchOption.TopDirectoryOnly);
            output = new StringBuilder();
            foreach (FileInfo fi in fis)
            {
                output.AppendLine(fi.Name);
            }
            using (StreamWriter sw = new StreamWriter(di.FullName + @"\!playlist.m3u", false, Encoding.GetEncoding("Windows-1252")))
            {
                sw.Write(output.ToString());
            }
        }
    }
}