[asp.net] จะดึง code html จากหน้าเว็บได้ยังไงบ้างครับ

System.IO.Stream str; String strmContents;
Int32 counter, strLen, strRead;
// Create a Stream object.
str = Request.InputStream;
// Find number of bytes in stream.
strLen = Convert.ToInt32(str.Length);
// Create a byte array.
byte[] strArr = new byte[strLen];
// Read stream into byte array.
strRead = str.Read(strArr, 0, strLen);

// Convert byte array to a text string.
strmContents = "";
for (counter = 0; counter < strLen; counter++)
{
    strmContents = strmContents + strArr[counter].ToString();            
}

using System;
using System.Text;
using System.Net;
 
public partial class DefaultCS : System.Web.UI.Page
{
 
  protected void btnGetHTML_Click(object sender, EventArgs e)
  {
    // We'll use WebClient class for reading HTML of web page
    WebClient MyWebClient = new WebClient();
 
    // Read web page HTML to byte array
    Byte[] PageHTMLBytes;
    if (txtURL.Text != "")
    {
      PageHTMLBytes = MyWebClient.DownloadData(txtURL.Text);
 
      // Convert result from byte array to string
      // and display it in TextBox txtPageHTML
      UTF8Encoding oUTF8 = new UTF8Encoding();
      txtPageHTML.Text = oUTF8.GetString(PageHTMLBytes);
    }
  }
}