[c#] 웹문서 소스(html) 긁어오기

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

namespace Example.System.Net
{
    public class WebRequestGetExample
    {
        public static void Main()
        {
            try
            {
                Console.WriteLine("http:// 뺀 주소를 입력 후 엔터키를 입력.");
                Console.Write("http://");
                string url = Console.ReadLine();
                //WebRequest request =
                //  WebRequest.Create("http://contoso.com/default.html");
                //WebRequest request =
                //  WebRequest.Create("http://google.co.kr");
                WebRequest request = WebRequest.Create("http://" + url);
                request.Credentials = CredentialCache.DefaultCredentials;


                HttpWebResponse response =
                    (HttpWebResponse)request.GetResponse();
                /*if (response.StatusDescription != "OK") 
                {
                    Console.WriteLine("주소값이 유효하지 않거나,
                        열리지 않는 사이트입니다.");
                    return;
                }*/
                Console.WriteLine(response.StatusDescription);
                Console.WriteLine("Charset = " + response.CharacterSet);
                //Console.WriteLine("content type = "
                //    + response.ContentType);
                //Console.WriteLine("content encoding = "
                //    + response.ContentEncoding);
                //Console.WriteLine("content length = "
                //    + response.ContentLength);
                Console.WriteLine("headers = " + response.Headers);
                return;

                Encoding encode;
                //if (response.CharacterSet == "utf-8") {
                //    encode = Encoding.UTF8;
                //}
                if (response.CharacterSet.ToLower() == "utf-8") {
                    encode = Encoding.UTF8;
                } else {
                    encode = Encoding.Default;
                }

                Stream dataStream = response.GetResponseStream();
                //StreamReader reader =
                //    new StreamReader(dataStream);
                //StreamReader reader =
                //    new StreamReader(dataStream, Encoding.Default);
                StreamReader reader =
                    new StreamReader(dataStream, encode);

                string responseFromServer = reader.ReadToEnd();
                Console.WriteLine(responseFromServer);

                reader.Close();
                dataStream.Close();
                response.Close();
            }
            catch (WebException e)
            {
                Console.WriteLine("주소값이 유효하지 않거나
                    열리지 않는 사이트입니다.");
                Console.WriteLine(e.Message);
            }
        }
    }
}