.net - C# In-page Code Not Telling 'Response' Dose Not Exist?

I have some code in umbraco that is run and creates a javascript file for looking up there IP and sending them to the correct site for there language, now this worked but i'm trying to add an override system into it so a user of the site can force them self's out of the redirect using cookies but for some reason when i try to right the response it tells me that the Response local variable cant be used before it is set

<%@ Master Language="C#" MasterPageFile="/umbraco/masterpages/default.master" AutoEventWireup="true" Debug="true" %>
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.Net" %>
<%@ Import Namespace="System.IO" %>
<asp:Content ContentPlaceHolderID="ContentPlaceHolderDefault" runat="server">
<script runat="server">
string getOutput(){
HttpCookieCollection MyCookieColl;

[Code].....