Just as a note to my self, here I showed one way of getting exe path, another way can be something like this:
Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "Afile.xml")
So, with line:
Assembly.GetExecutingAssembly().Location
we are receiving full path, then with line:
Path.GetDirectoryName(...)
we are getting just a folder name, and with line:
Path.Combine(...)
we are combining path with our file name.