WCF / ASMX :: Redirect Response In Web Service?

I read that webservices are basically used in backgroung. It can't be use for redirecting to some other url. Then what is meaning of following code which is from msdn. I am not able to implement this code.

Redirection If you need to provide a redirect response in your Web service, do not use the Context.Response.Redirect method because the HTTP response will differ from what the Basic Profile mandates. [R1130]

The following example shows how to give a redirect response that complies with the Basic Profile:

[WebMethod]public string HelloWorld(){ Context.Response.StatusCode = 307; Context.Response.AddHeader("Location","<redirect URL>"); return null;}