illegal character in path

I am trying to get to a file located in

C:\Program Files (x86)\test software\myapp\demo.exe

In VS debugger i see the path as:

"\"C:\\\Program Files (x86)\\\test software\\\myapp\\\demo.exe\""

when i print it out i see in console :

"C:\Program Files (x86)\test software\myapp\demo.exe"

but when i try something like

FileInfo fi = new FileInfo(PathMentionedAbove); 

i get Illegal character in path.

What is wrong? the file exists and path is correct. what's illegal above this path?

any help would be appreciated.