I have gone through the tutorial "Create Excel Group in C#, VB.NET" to create excel groups in c# but couldn't find an option to have the collapse/expand option above collapsed rows.
I know this can be done manually in excel sheet. In excel 2013, data tab, Outline settings, after unchecking "Summary rows below detail" the collapse/expand icon moves above the details.
My question is, how can we do this through code?