DirectoryListing.cs

using System;
using System.IO;
using System.Web.UI;
using System.Web.UI.WebControls;

public class DirectoryListing:Page 
{
    protected void WriteTitle()
    {
        Response.Write("Listing contents of directory");
    }

    protected void WriteFiles()
    {
        DirectoryInfo dir;
        FileInfo[] files;
        dir = new DirectoryInfo(Server.MapPath("."));
        files = dir.GetFiles();
        foreach (FileInfo f in files) { 
            if ( f.Name.ToString() != "index.aspx" && f.Name.ToString() != "web.config" && f.Name.ToString() != "DirectoryListing.cs") {
                Response.Write("<a href=\"" + f.Name.ToString() + "\">");
                Response.Write(f.Name.ToString() + "</a><br />");
            }      
        }
    }
}