private void BtnOperation_OnClick(object sender, RoutedEventArgs e)
        {
            var Client = new CRUD_ManagerServiceClient();

            if (MainGrid.SelectedIndex != -1)
            {
                var b  = (Button)sender;
                var gt = b.TransformToVisual(Application.Current.RootVisual);
                var p  = gt.Transform(new Point(0, b.ActualHeight));

                MyPopup.HorizontalOffset = p.X;
                MyPopup.VerticalOffset   = 100;

                MyPopup.IsOpen = true;
                var salesorder = MainGrid.SelectedItem as TblSalesOrder;
                //_viewModel.Operation(salesorder.Iserial);
                Client.GetTblSalesOrderOperationAsync(salesorder.Iserial);

                Client.GetTblSalesOrderOperationCompleted += (s, sv) =>
                {
                    SalesOrderOperationGrid.ItemsSource = sv.Result;
                };
            }
        }