String Name = HttpContext.Current.User.Identity.Name;

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" _
  AutoEventWireup="true" CodeFile="Chat.aspx.cs" Inherits="Chat" _
  Title="Unbenannte Seite" %>
 
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" _
  Runat="Server">
 
 
<script type="text/javascript" language="JavaScript" >
 
document.writeln('<iframe 
' src="http://www.spin.de/cb/home?chn=_AS-S%F6rrach;st=13;id=ZpTcTuZQ3RGz3oWcv" & _
"am2Q;w=650;h=480;gender=m;user=Jens_LWG;terms=1;submitted=1></iframe>');
</script><noscript>
<iframe _
  src="http://www.spin.de/cb/start?chn=_WG-L%F6rrach;srv=0;cat=1;id=ZpTcTuZQ3R" & _
  "z3oWcv_am2Q;st=13;w=700;h=600" width="655" height="490" border="0" _
  frameborder="0" >
</iframe></noscript><style="background-color: Black">
 
 
</asp:Content>