Problem sa preuzimanjem stranice pomoću C#-a

Code:
WebClient webClient = new WebClient();
string URL = "http://en.wikipedia.org/wiki/Belgrade";
string FileName = @"C:\Belgrade.htm";
webClient.DownloadFile(URL, FileName);

Code:
string userAgent = "XYZ";
webClient.Headers.Add(HttpRequestHeader.UserAgent, userAgent);

Code:
   class Program
    {
        static int WAIT = 1100;

        static void DownloadMethod(WebClient webClient, string URL, string OutputFile)
        {
            System.Threading.Thread.Sleep(WAIT);
            try
            {
                webClient.DownloadFile(URL, OutputFile);
            }
            catch (Exception ex) 
            {
                StreamWriter sw = File.AppendText(@"C:\GreskeENG.txt");
                sw.WriteLine(OutputFile + "|" + ex.Message);
                sw.Close();
            }
        }

        static void Download(string Country, string City)
        {
            WebClient webClient = new WebClient();
            webClient.Headers["User-Agent"] = 
                @"Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/A.B (KHTML, like Gecko) Chrome/X.Y.Z.W Safari/A.B.";
            Directory.CreateDirectory(@"C:\Cities\" + Country + @"\" + City);
            string URL = @"http://en.wikipedia.org/wiki/" + City.Replace(' ', '_');
            string OutputFile = @"C:\Cities\" + Country + @"\" + City + @"\[e] " + City + @".htm";
            DownloadMethod(webClient, URL, OutputFile);
        }

        static void Main(string[] args)
        {
            int brojac = 0;
            bool cities = false;
            string Country = "";
            string City = "";
            StreamReader sr = new StreamReader(@"C:\Cities\Cities.txt");
            while (!sr.EndOfStream)
            {
                brojac++;
                Console.Write(brojac + " ");
                string s = sr.ReadLine().Trim();
                Console.WriteLine(s);
                if (s.Equals(@"{"))
                    cities = true;
                else if (s.Equals(@"}"))
                    cities = false;
                else if (!cities)
                {
                    Country = s;
                    Directory.CreateDirectory(@"C:\Cities\" + Country);
                }
                else if (cities)
                {
                    City = s;
                    Download(Country, City);
                }
            }
        }
    }