IChartFrameFormat Border Property

<para>//Create worksheet</para><para>Workbook workbook = new Workbook();</para><para>workbook.LoadFromFile("Sample.xlsx");</para><para>Worksheet worksheet = workbook.Worksheets[0];</para><para>//Create chart and set range</para><para>IChart chart = worksheet.Charts.Add();</para><para>chart.DataRange = worksheet.Range["B2:C6"];</para><para>//Set chart type</para><para>chart.ChartType = ExcelChartType.Cone3DClustered;</para><para>//border of the chart element</para><para>chart.ChartTitleArea.Text = "Sample Chart";</para><para>chart.ChartTitleArea.FrameFormat.Border.Color = Color.Red;</para><para>chart.ChartTitleArea.FrameFormat.Border.Pattern = ChartLinePatternType.DashDotDot;</para><para>//Save to file</para><para>workbook.SaveToFile("Chart.xlsx");</para>