private void LaunchButton_Click(object sender, RoutedEventArgs rea)
        {
            //Port
            try {
                controller.port = Int32.Parse(PortStarter.Text);
            } catch (FormatException e) {
                PortStarter.Text = "";
                return;
            }

            controller.nickname  = NameStarter.Text;
            controller.ipAddress = (string)IpStarter.SelectedValue;

            //New Address ip
            if (ContainNode.IsChecked.Value)
            {
                int portNode = -1;
                try
                {
                    portNode = Int32.Parse(PortNode.Text);
                }
                catch (FormatException e)
                {
                    PortNode.Text = "";
                    return;
                }
                controller.addParticipant(NameNode.Text);
                controller.addPair(new Pair(AddressIpNode.Text, portNode));
            }

            Hide();
            new MainWindow(controller).Show();
        }