void ReactOnTime(object sender, EventArgs e)
 {
     using (Service.Service1Client mainClient = new Service.Service1Client())
     {
         Listelem = mainClient.getPanier(Token.Text);
         ElPanier.Clear();
         for (int i = 0; i < Listelem.Length; i++)
         {
             ElPanier.Add(Listelem[i]);
         }
     }
 }
        public Panier(string tok)
        {
            InitializeComponent();
            Token.Text = tok;

            using (Service.Service1Client client = new Service.Service1Client())
            {
                Listelem = client.getPanier(Token.Text);
            }
            for (int i = 0; i < Listelem.Length; i++)
            {
                ElPanier.Add(Listelem[i]);
            }
            Paniers.ItemsSource = ElPanier;

            timer.Interval = new TimeSpan(0, 0, 1);
            timer.Tick    += ReactOnTime;
            timer.Start();
        }