[]
Gets or sets whether curve smoothing is enabled for the series.
Returns true if curve smoothing is turned on for a line chart or scatter chart series.
Applies only to line and scatter charts.
bool Smooth { get; set; }
Property Smooth As Boolean
worksheet.Range["A1:B4"].Value = new object[,] {{"Month", "Sales"}, {"Jan", 12}, {"Feb", 18}, {"Mar", 15}};
IChart chart = worksheet.Shapes.AddChart(ChartType.Line, 20, 20, 300, 200).Chart;
chart.SeriesCollection.Add(worksheet.Range["A1:B4"]);
ISeries series = chart.SeriesCollection[0];
series.Smooth = true;
bool smooth = series.Smooth;