class Program
    {
        static void Main(string[] args)
        {
                AuthenticationServiceClient asc = new AuthenticationServiceClient();

                string cookies = "";
                using (OperationContextScope scope = new OperationContextScope(asc.InnerChannel))
                {
                    asc.Login(username, password, null, false);
                    cookies = OperationContext.Current.GetOutgoingCookies();
                }

                PrimeServiceClient psc = new PrimeServiceClient();
                using (OperationContextScope scope = new OperationContextScope(psc.InnerChannel))
                {
                    OperationContext.Current.SetOutgoingCookies(cookies);
                    Console.WriteLine(psc.NextPrime(3));
                }

                using (OperationContextScope scope = new OperationContextScope(asc.InnerChannel))
                {
                    OperationContext.Current.SetOutgoingCookies(cookies);
                    asc.Logout();
                }
        }
    }