this.BeginInvoke((MethodInvoker)delegate
                {
                    if (res.maintenance == "1")
                    {
                        panel1.BackColor = Color.Orange;
                        flatStatusBar1.BaseColor = Color.Orange;
                        flatStatusBar1.RectColor = Color.Red;
                        flatStatusBar1.Text = "Maintenance en cours !";
                        label_copyright.BackColor = Color.Orange;
                        Connect_Button.Text = "En Maintenance";
                        maintenance_perso.Visible = true;
                        Connect_Button.Enabled = false;
                        maintenance = true;
                    }
                });
                if (res.maintenance == "0")
                {

                    maintenance = false;
                    checkupdate();
                }