How do I redirect subscrb expired users to subscription page?

Hi I have web application which when users login they will subscribe. But When their subscription expires the application will redirect them to subscription page to renew subscribe. But I have this code on visual basic, any one who can help me with the c# version? Public Sub Application_AuthorizeRequest(ByVal sender As Object, ByVal e As EventArgs) If isexpired Then 'signout 'redirect End If End Sub or Public Sub Application_AuthorizeRequest(ByVal sender As Object, ByVal e As EventArgs) If isexpired Then 'redirect End If End Sub