Hi,
in Documents.Excel, TableStyles can be used to simplify formatting of named tables. In MS Excel itself, these styles can contain borders (incl. lines, colours) for cells, see the image in the forum link below. Documents.Excel, does offer access to the "outer" lines (top, bottom ,left, right), but not for the "inner vertical" and "inner horizontal" lines. Thes borders would enabled a "grid look" in the TableStyle.
As many other formats are supported in TableStyles, these should be, too :D.
Link to Forum discussion:
https://ko.infragistics.com/community/forums/f/ultimate-ui-for-windows-forms/121077/documents-excel-cell-borders-in-tablestyle/535135#535135
Regards
Martin