How to use ASP. NET to develop chat rooms based on push technology ?, Asp.net chat room

How to use ASP. NET to develop chat rooms based on push technology ?, Asp.net chat room

Public class Content: System. Web. UI. Page
{
Private void Page_Load (object sender, System. EventArgs e)
{
Session. Timeout = 60;
Response. Write ("Welcome... <br> ");
Response. Flush ();
Application [Session. SessionID] = Response;
System. Threading. Thread. Sleep (System. Threading. Timeout. Infinite );
}
}


// Send. aspx. cs /////////////////////////////////////// ///////////////////
Public class Send: System. Web. UI. Page
{
Protected System. Web. UI. WebControls. Button ButtonSend;
Protected System. Web. UI. WebControls. TextBox TextBox1;

Private void ButtonSend_Click (object sender, System. EventArgs e)
{
Foreach (string name in Application. AllKeys)
{
HttpResponse Response = Application [name] as HttpResponse;
If (Response! = Null & Response. IsClientConnected)
{
Response. Write (TextBox1.Text + "<br> ");
Response. Flush ();
}
Else
{
Application. Remove (name );
}
}
}
}