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Currently, XlsIO supports creating a workbook with at least one worksheet. Need to make enhancement for creating workbook without any worksheets. Refer to the below code snippet.
using (ExcelEngine excelEngine = new ExcelEngine())
{
IApplication application = excelEngine.Excel;
IWorkbook workbook = application.Workbooks.Create(0);
IWorksheet worksheet = workbook.Worksheets.Create("Sheet1");
worksheet["A1"].Text = "Created From Empty book";
workbook.SaveAs("Output.xlsx");
}