private async void UserControl_Loaded(object sender, RoutedEventArgs e)
        {//load
            try
            {
                HelpClass.StartAwait(grid_main);
                requiredControlList = new List <string> {
                    "name", "email", "port", "smtpClient", "side", "password",
                };
                if (MainWindow.lang.Equals("en"))
                {
                    //MainWindow.resourcemanager = new ResourceManager("Restaurant.en_file", Assembly.GetExecutingAssembly());
                    grid_main.FlowDirection = FlowDirection.LeftToRight;
                }
                else
                {
                    //MainWindow.resourcemanager = new ResourceManager("Restaurant.ar_file", Assembly.GetExecutingAssembly());
                    grid_main.FlowDirection = FlowDirection.RightToLeft;
                }
                translate();
                FillCombo.FillSideCombo(cb_side);
                Keyboard.Focus(tb_name);
                await Search();

                Clear();
                HelpClass.EndAwait(grid_main);
            }
            catch (Exception ex)
            {
                HelpClass.EndAwait(grid_main);
                HelpClass.ExceptionMessage(ex, this);
            }
        }