How to get path of .ini file while run in windows service?

I have a small doubt. I want to get my configue file path from folder where i install my project it may be any drive path. currently i give path hardcoded in program but at time of installation in different system it would give error.

I tried following ,

string f = Path.Combine(Directory.GetCurrentDirectory(), "hr.ini");

but after installing service it returns path like below,

"C:\Windows\system32\hr.ini. "

but i want its actual path where this file is present which is "C:\ProgramFiles\SetupProject\hr.ini".

so please suggest me any examples.
thanks