asp.net bir sitenin html bilgilerini çekmek

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

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        WebRequest request = WebRequest.Create("http://www.urfetdemirtas.com/");

        request.Method = "POST";

        string postData = "http://www.urfetdemirtas.com/";

        byte[] byteArray = Encoding.UTF8.GetBytes(postData);

        request.ContentType = "application/x-www-form-urlencoded";

        request.ContentLength = byteArray.Length;

        Stream dataStream = request.GetRequestStream();

        dataStream.Write(byteArray, 0, byteArray.Length);

        dataStream.Close();

        WebResponse response = request.GetResponse();

        Console.WriteLine(((HttpWebResponse)response).StatusDescription);

        dataStream = response.GetResponseStream();

        StreamReader reader = new StreamReader(dataStream);

        string responseFromServer = reader.ReadToEnd();

        TextBox1.Text = responseFromServer.ToString();
    }
}