Charts interface
A collection of all the chart sheets in the specified or active workbook. Each chart sheet is represented by a Chart object. This doesn’t include charts embedded on worksheets or dialog sheets. For information about embedded charts, see the ChartObject object.
Namespace: Microsoft.Office.Interop.Excel
Assembly: Microsoft.Office.Interop.Excel (in Microsoft.Office.Interop.Excel.dll)
Use the Charts property to return the Charts collection. Use the Add method to create a new chart sheet and add it to the workbook.
You can combine the Add method with the ChartWizard method to add a new chart that contains data from a worksheet.
Use Charts(index), where index is the chart sheet index number or name, to return a single Chart object.
The Sheets collection contains all the sheets in the workbook (both chart sheets and worksheets). Use Sheets(index), where index is the sheet name or number, to return a single sheet.