The values applied to the row/column should be explicitly set on each used cell as well. Otherwise, if they are applied on row/column only, the used cells don't use the desired values when opening the document.

To reproduce:

1. Set some content on cell A1
2. Create a row selection and apply a fill color to it (or any other property)
3. Export the document and open it in an application

Observed: All cells except A1 have the specified color.

Workaround: Use cell selection, e.g.:

sheet.Cells[0,10].SetFill(PatternFill.CreateSolidFill(Colors.Red));