Check List of Status of List of Websites

WebsiteChecker.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace WebsiteChecker
{
    class Program
    {
        static void Main(string[] args)
        {
            var urls = new List<string>();
            // read in a series of websites 
            using (var reader = new StreamReader("WebsiteList.txt"))
            {
                while (!reader.EndOfStream)
                {
                    urls.Add(reader.ReadLine());
                }
            }

            // Track the status of each site
            using (FileStream fs = new FileStream("Results.txt", FileMode.Append, FileAccess.Write))
            using (StreamWriter sw = new StreamWriter(fs))
            {
                foreach (var url in urls)
                {
                    HttpWebResponse httpRes = null;

                    var httpReq = (HttpWebRequest)WebRequest.Create("http://" + url);
                    httpReq.AllowAutoRedirect = false;
                    try
                    {
                        httpRes = (HttpWebResponse)httpReq.GetResponse();
                        sw.WriteLine("{0} - {1}", url, httpRes.StatusCode);
                        httpRes.Close();
                    }
                    catch (Exception)
                    {
                        sw.WriteLine(url + " - Error");
                    }
                }
            }

        }
    }
}