How to: Create a Chart Sheet
This example demonstrates how to create a new chart sheet - a separate sheet in a workbook containing only a chart. To do this, use the ChartSheetCollection.Add method of the Workbook.ChartSheets collection.
Use the ChartSheet.Chart property to access a chart located on the chart sheet and specify or modify its settings (select chart data, change the chart type and adjust its appearance).
// Create a chart sheet containing a pie chart. ChartSheet chartSheet = workbook.ChartSheets.Add(ChartType.Pie, worksheet["B2:C7"]);
The image below shows a new chart sheet added to a workbook.