How to show horizontal and vertical grid lines in WPF Gantt control

            <sync:GanttControl.Resources>
                <Style TargetType="chart:GanttChartRow">
                    <Setter Property="BorderThickness" Value="0,0,0,2"/>
                    <Setter Property="BorderBrush" Value="Orange"/>
                </Style>
            </sync:GanttControl.Resources>

        <sync:GanttControl x:Name="Gantt"
                               ItemsSource="{Binding TaskCollection}"
                               ResourceCollection="{Binding ResourceCollection}"
                               ShowStripLines="True" Loaded="Gantt_Loaded"
                               StripLines="{Binding StripCollection,
    
                                                         Mode=TwoWay,
                                                    UpdateSourceTrigger=PropertyChanged}"
                               VisualStyle="Metro">
 
          …
 
            <sync:GanttControl.TaskAttributeMapping>
                <sync:TaskAttributeMapping TaskIdMapping="TaskId"
                                               TaskNameMapping="TaskName"
                                               StartDateMapping="StartDate"
                                               FinishDateMapping="FinishDate"
                                               ChildMapping="Child"
                                               DurationMapping="Duration"
                                               ProgressMapping="Progress"
                                               PredecessorMapping="Predecessor"
                                               ResourceInfoMapping="Resources"/>
            </sync:GanttControl.TaskAttributeMapping>
        </sync:GanttControl>

        private void Gantt_Loaded(object sender, RoutedEventArgs e)
        {
            Border border = VisualTreeHelper.GetChild(Gantt, 0) as Border;
            Grid grid = VisualTreeHelper.GetChild(border, 0) as Grid;
            ScrollViewer scrollViewer = VisualTreeHelper.GetChild(grid, 2) as ScrollViewer;
            Grid scrollGrid = scrollViewer.Content as Grid;
            ganttChart = VisualTreeHelper.GetChild(scrollGrid, 1) as GanttChart;
            ganttSchedule = VisualTreeHelper.GetChild(scrollGrid, 0) as GanttSchedule;
 
            List<StripLineInfo> stripCollection = new List<StripLineInfo>();
            var differenceTime = (this.ganttSchedule.EndTime - this.ganttSchedule.StartTime).Days;
            for (int i = 0; i < differenceTime; i++)
            {
 
 
                stripCollection.Add(new StripLineInfo()
                {
                    Type = StriplineType.Absolute,
                    Width = 2,
                    Height = this.ganttChart.ActualHeight,
                    Position = new Point(PositionCalculation(this.ganttSchedule.StartTime.AddDays(i)), 0),
                    HorizontalContentAlignment = HorizontalAlignment.Center,
                    VerticalContentAlignment = VerticalAlignment.Center,
                    Background = new SolidColorBrush(Colors.Orange),
                });
            }
            model.StripCollection = stripCollection;
        }
 
        private double PositionCalculation(DateTime day)
        {
            DateTime date = ganttSchedule.StartTime;
            MethodInfo methodInfo = typeof(GanttChart).GetMethod(
    "GetStartPositionOfDate",
    BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Static,
    null,
    new Type[] { typeof(DateTime) },
    null);
            object[] dateObjects = new object[] { day };
            double extent =
                (double)
                methodInfo.Invoke(
                    this.ganttChart,
                    BindingFlags.Instance | BindingFlags.NonPublic,
                    null,
                    dateObjects,
                    CultureInfo.CurrentCulture);
            return extent;
        }