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Clears the formatting of this series.
Use this method to remove custom formatting that has been applied to the series.
void ClearFormats()
Sub ClearFormats()
worksheet.Range["A1:B4"].Value = new object[,] {{"Month", "Sales"}, {"Jan", 12}, {"Feb", 18}, {"Mar", 15}};
IChart chart = worksheet.Shapes.AddChart(ChartType.ColumnClustered, 20, 20, 300, 200).Chart;
chart.SeriesCollection.Add(worksheet.Range["A1:B4"]);
ISeries series = chart.SeriesCollection[0];
series.Format.Fill.Color.RGB = Color.Blue;
series.ClearFormats();