Hi Domenico,
Thank you for your interest in Syncfusion Products.
In Our XlsIO, we have two “InsertRow()” and “InsertColumn()” methods to insert the row and column in the worksheet respectively, please use the below code snippet in your program and also we have created the sample for your reference with the assembly version 8.2.0.18 in 3.5 .Net Framework. Could you please get the sample from the below link and let us know if this helps you.
Code-Snippet:
IWorksheet worksheet = workbook.Worksheets[0];
worksheet.InsertRow(1);
worksheet.InsertColumn(1);
Sample:
http://help.syncfusion.com/samples/xlsio.windows/samples/F94726.zipPlease, let me know if you need any clarifications.
Regards,
Sathish