Fiddler doesn t capture traffic from my C app

Question

I've tried Fiddler with Fiddler2 and Fiddler4, FiddlerCore, and Charles proxy on Windows 10 x64 and Windows 7 Ultimate x86 in Oracle VM as a guest, as well as on Windows 10 with Fiddler2 and Fiddler4, FiddlerCore, and Charles proxy.

All of the previously mentioned settings fail miserably to capture traffic from my app - ran from debug or released folder, or directly from VS debugger, both in x64 and x86.

I'm using Visual Studio 2015, and I'm targeting.net 4.5. In addition, I do not have full admin permissions on the host OS (Windows 10), which could be a problem.

Fiddler must be started first and/or as administrator. Starting my app or VS as administrator also won't work.

Editing machine.config won't work because there isn't a.net part (presumably in Win10), so I edited the.web one instead.

Is there a library that logs requests and responses at the application level rather than at the OS level?