ExcelFile.AddSheet Method
Inserts an empty sheet at the end of the file. This is equivalent to calling InsertAndCopySheets(0, SheetCount + 1, 1). If you need to insert more than one sheet, or insert it at the middle of existing sheets, use InsertAndCopySheets(Int32, Int32, Int32) instead.
Syntax
Namespace: FlexCel.Core
public void AddSheet()