Nicos QnD Whois

namespace Whois
{
    #region Namespaces
    using System;
    using System.Collections.Generic;
    using System.Text;
    using System.Net;
    using System.IO;
    using System.Xml;
    using System.Net.Sockets;
    #endregion

    class NicosWhoisTool
    {
        private static FileInfo f;

        static void Main(string[] args)
        {
            Console.Title = "Nicos little Whois-Tool";
            //path to the serverlist:
            var xmlFile = AppDomain.CurrentDomain.BaseDirectory + @"\serverlist.xml";

            //string-array to store the servers:
            string[] output = new string[1024];
            //counter variable:
            int z = 0;

            #region parsing the xml-file

            using (XmlReader reader = XmlReader.Create(File.OpenRead(xmlFile)))
            {
                //reading the xml-file
                while (reader.Read())
                {
                        //navigate to the <server> element
                        reader.ReadToFollowing("server");
                        //opening the first-attribute (host="..."):
                        reader.MoveToFirstAttribute();
                        //writing the host-value into the array:
                        string host = reader.Value;
                        output[z] = host; //you could write this also short: output[z] = reader.Value;

                        z++;
                }
            }
            #endregion

            Console.WriteLine("Please insert the host/ip that you wanna lookup");
            Console.Write("Host/IP:> ");
            string check = Console.ReadLine();

            for (int i = 0; i < output.Length; i++)
            {
                if (null != output[i])
                {
                    try
                    {
                        Console.WriteLine("Checking {0} on Server: {1}", check, output[i]);
                        //check the adress in the whois-databases:
                        Console.WriteLine(GetWhois(output[i], check));
                    }
                    catch (Exception ex)
                    {
                        Console.ForegroundColor = ConsoleColor.Red;
                        Console.WriteLine("\tError:\n{0}", ex.Message);
                        Console.ForegroundColor = ConsoleColor.Gray;
                    }
                }
                else
                    break;
            }
            Console.WriteLine("\n\t\tWhois-Request done!");
            Console.ReadLine();
        }

        /// <summary>
        /// Gets the Whois-DB-Information.
        /// </summary>
        /// <param name="whoisSvr">The Whois-Server as <see cref="System.String"/>.</param>
        /// <param name="requestUrl">The request Domainname as <see cref="System.String"/>.</param>
        /// <returns>A <see cref="System.String"/> with all the responses from the Servers.</returns>
        private static string GetWhois(string whoisSvr, string requestUrl)
        {
            StringBuilder strbRes = new StringBuilder();
            TcpClient tcpClientWhois = new TcpClient(whoisSvr, 43); //create client on whois-port 43
            NetworkStream nwStrWhois = tcpClientWhois.GetStream();
            BufferedStream bufStrWhois = new BufferedStream(nwStrWhois);
            StreamWriter streamWriter = new StreamWriter(bufStrWhois);

            streamWriter.WriteLine(requestUrl);
            streamWriter.Flush();

            StreamReader streamReaderReceive = new StreamReader(bufStrWhois);

            while (!streamReaderReceive.EndOfStream)
            {
                strbRes.AppendLine(streamReaderReceive.ReadLine());
            }
            return strbRes.ToString();
        }
    }
}