[]
Gets the format of the point.
IChartFormat Format { get; }
ReadOnly Property Format As IChartFormat
worksheet.Range["A1:B4"].Value = new object[,] {{"Category", "Value"}, {"A", 30}, {"B", 20}, {"C", 50}};
IChart chart = worksheet.Shapes.AddChart(ChartType.Pie, 20, 20, 300, 200).Chart;
chart.SeriesCollection.Add(worksheet.Range["A1:B4"]);
IPoint point = chart.SeriesCollection[0].Points[1];
IChartFormat format = point.Format;
format.Fill.Color.RGB = Color.Red;