Hide or Disable the outside border (draggable) in Excel file when exporting using ClosedXml (OpenXml) in C#

Hi,

I tried this link https://www.aspsnippets.com/Articles/Export-DataTable-to-Excel-using-OpenXml-in-Windows-Forms-WinForms-Applications-using-C-and-VBNet.aspx

But I face one issue I did not able to hide or disable the outside border (draggable).

Rest export is working fine. 

Please see the bottom right corner, you can see blue draggable icon, if you drag it sample columns are inserting in excel.

Please guide me how to do this.