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Gets the marker format for this series.
Use the returned IChartFormat object to configure the fill and line formatting of markers in the series.
IChartFormat MarkerFormat { get; }
ReadOnly Property MarkerFormat As IChartFormat
worksheet.Range["A1:B4"].Value = new object[,] {{"Month", "Sales"}, {"Jan", 12}, {"Feb", 18}, {"Mar", 15}};
IChart chart = worksheet.Shapes.AddChart(ChartType.LineMarkers, 20, 20, 300, 200).Chart;
chart.SeriesCollection.Add(worksheet.Range["A1:B4"]);
ISeries series = chart.SeriesCollection[0];
IChartFormat markerFormat = series.MarkerFormat;
markerFormat.Fill.Color.RGB = Color.Red;