How to obtain the HTML source code again

Code
Geturlhtml. aspx

<% @ Page Language = " C # " Codebehind = " Geturlhtml. aspx. CS " SRC = " Geturlhtml. aspx. CS " Autoeventwireup = " False " Inherits = " Lion. Web. Forum. webform1 " %>
< Html >
< Head >
< Title > Lion interactive network => Use WebClient and webrequest to obtain webpagesSource code </ Title >
< Meta HTTP - Equiv = " Content-Type " Content = " Text/html; charset = gb2312 " >
</ Head >
< Body >
< Form runat = " Server " >
< ASP: textbox ID = " Urltext " Runat = " Server " Width = " 50% " > HTTP: // Www.lionsky.net/mywebsite/index.aspx </ASP: textbox>
< ASP: button ID = " Button1 " Runat = " Server " Text = " Use WebClient to obtain " > </ ASP: button > & Nbsp;
< ASP: button ID = " Button2 " Runat = " Server " Text = " Use webrequest to obtain " > </ ASP: button > < BR >
< ASP: textbox ID = " Contenthtml " Runat = " Server " Width = " 100% " Height = " 360px " Textmode = " Multiline " > </ ASP: textbox >
</ Form >
</ Body >
</ Html >

Geturlhtml. aspx. CS

Using System;
Using System. collections;
Using System. componentmodel;
Using System. Data;
Using System. drawing;
Using System. Web;
Using System. Web. sessionstate;
Using System. Web. UI;
Using System. Web. UI. webcontrols;
Using System. Web. UI. htmlcontrols;

Namespace Lion. Web. Forum
{
/// <Summary>
/// Abstract description of webform1.
/// </Summary>
Public Class Webform1: system. Web. UI. Page
{
Protected System. Web. UI. webcontrols. textbox textbox1;
Protected System. Web. UI. webcontrols. Button button1;
Protected System. Web. UI. webcontrols. Button button2;
Protected System. Web. UI. webcontrols. textbox urltext;
Protected System. Web. UI. webcontrols. textbox contenthtml;
Protected System. Web. UI. webcontrols. textbox textbox2;

# Region Generated by the web Form DesignerCode
Override Protected Void Oninit (eventargs E)
{
//
// Codegen: This call is required by the ASP. NET web form designer.
//
Initializecomponent ();
Base . Oninit (E );
}

/// <Summary>
/// The designer supports the required methods-do not use the code editor to modify
/// The content of this method.
/// </Summary>
Private Void Initializecomponent ()
{
This . Button1.click + = New System. eventhandler ( This . Button#click );
This . Button2.click + = New System. eventhandler ( This . Button2_click );

}
# Endregion

Private Void Button#click ( Object Sender, system. eventargs E)
{
String Pageurl = Urltext. text;
System. net. WebClient WC = New System. net. WebClient ();
WC. Credentials = System. net. credentialcache. defaultcredentials;

/// Method 1:
Byte [] pagedata = WC. downloaddata (pageurl );
Contenthtml. Text = System. Text. encoding. Default. getstring (pagedata );

/// Method 2:
/// * ************** Code start **********
/// Stream resstream = WC. openread (pageurl );
/// Streamreader sr = new streamreader (resstream, system. Text. encoding. Default );
/// Contenthtml. Text = Sr. readtoend ();
/// Resstream. Close ();
/// * ************* Code end ********
///
WC. Dispose ();

}

Private Void Button2_click ( Object Sender, system. eventargs E)
{
String Pageurl = Urltext. text;
System. net. webrequest request = System. net. webrequest. Create (pageurl );
System. net. webresponse response = Request. getresponse ();
System. Io. Stream resstream = Response. getresponsestream ();
System. Io. streamreader SR = New System. Io. streamreader (resstream, system. Text. encoding. Default );
Contenthtml. Text = Sr. readtoend ();
Resstream. Close ();
Sr. Close ();

}
}
}