Redirect To An URL When Invoke A Webservice Method In Application?

I have a web service method in .net as below:

[WebMethod(Description = "Adds two numbers", MessageName = "AddMessage")]
public string Add(string x)
{
string retVal = x;
string fileLoc = @"D:KumareshCreateFile.xml";
StreamWriter sw = new StreamWriter(fileLoc);
sw.WriteLine(retVal);
HttpResponse response = HttpContext.Current.Response;
response.Redirect(http://www.google.co.in", true);
sw.Close();
return retVal;
}

I deployed my webservice in IIS server. I have created another .net application, and called the webservice method from the new application. My problem is I am unable to redirect to the specified link[google.co.in]. I am getting the following error: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Web.HttpException: Response is not available in this context. at System.Web.UI.Page.get_Response() Sometimes I get the error as: "Object moved here". "here" is shown as a hyperliink, If I click here, i am redirected to the specified link.