PPTX formatiert Diagramme in C#

//Creating Charts in a Presentation
    Presentation pres = new Presentation();
    
    ISlide slide = pres.Slides[0];
    
    //Creating the default chart
    IChart chart = slide.Shapes.AddChart(ChartType.ScatterWithSmoothLines, 0, 0, 400, 400);
    
    //Getting the default chart data worksheet index
    int defaultWorksheetIndex = 0;
    
    //Accessing the chart data worksheet
    IChartDataCellFactory fact = chart.ChartData.ChartDataCellFactory;
    
    //Delete demo series
    chart.ChartData.Series.Clear();
    
    //Add new series
    chart.ChartData.Series.Add(fact.GetCell(defaultWorksheetIndex, 1, 1, "Series 1"), chart.Type);
    chart.ChartData.Series.Add(fact.GetCell(defaultWorksheetIndex, 1, 3, "Series 2"), chart.Type);
    
    //Take first chart series
    IChartSeries series = chart.ChartData.Series[0];
    
    //Add new point (1:3) there.
    series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 2, 1, 1), fact.GetCell(defaultWorksheetIndex, 2, 2, 3));
    
    //Add new point (2:10)
    series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 3, 1, 2), fact.GetCell(defaultWorksheetIndex, 3, 2, 10));
    
    //Edit the type of series
    series.Type = ChartType.ScatterWithStraightLinesAndMarkers;
    
    //Changing the chart series marker
    series.Marker.Size = 10;
    series.Marker.Symbol = MarkerStyleType.Star;
    
    //Take second chart series
    series = chart.ChartData.Series[1];
    
    //Add new point (5:2) there.
    series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 2, 3, 5), fact.GetCell(defaultWorksheetIndex, 2, 4, 2));
    
    //Add new point (3:1)
    series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 3, 3, 3), fact.GetCell(defaultWorksheetIndex, 3, 4, 1));
    
    //Add new point (2:2)
    series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 4, 3, 2), fact.GetCell(defaultWorksheetIndex, 4, 4, 2));
    
    //Add new point (5:1)
    series.DataPoints.AddDataPointForScatterSeries(fact.GetCell(defaultWorksheetIndex, 5, 3, 5), fact.GetCell(defaultWorksheetIndex, 5, 4, 1));
    
    //Changing the chart series marker
    series.Marker.Size = 10;
    series.Marker.Symbol = MarkerStyleType.Circle;
    
    pres.Save("AsposeScatterChart.pptx", SaveFormat.Pptx);