How to find a bug in visual studio or computer that is causing the application not to open?

Question

C++ / C#

I am writing a program in C#, in Visual Studio 2013.
A week or two ago, I ran the program .exe file from the debug and everything worked fine. Now, something is trying to start, according to the task manager I see in the background, a couple of seconds, then it disappears and that's it. bad end. And in the development environment itself - VS, everything starts without errors, and so on.
They say some kind of bug in the compilation or something. The project is working, a friend ran it and compiled everything was fine.
Where is the bug?

Answer 1

You can try to add logging and log AppDomain.UnhandledException

Answer 2

First, we look at the Windows logs.