log out based on parameter url

hi, am new in c# and  need some help. I want to log out users based on url parameter eg localhost/?parameter=logoutaction.

The code below seem to be working but want to make sure this is the correct of doing it.
 protected void Page_Load(object sender, EventArgs e)
{
        String querystr = Request.QueryString["action"];
        if (querystr == "logoutUsers")
        {        
                FormsAuthentication.SignOut();

          Session.Abandon();
          FormsAuthentication.RedirectToLoginPage();
           Response.End;        
     }

}
Thanks a bunch.

Ceci