Logging unhandled exceptions in a Windows Application to file

[Mikexx]

Please be gentle to a C# newbie in Visual Studio.
I have been handed a Windows Forms application using .Net 4.6 and has 3 namespaces, two of which are dll Class Libraries.
I have looked at NLog and gone some way down the path with tutorials and examples. However it seems easy to output handled exceptions to a log file but struggling to output unhandled exceptions.
I've only touched Log4Net but this looks the same. All the example tutorials have a single namespace and no examples of where unhandled exceptions are recorded.

Is there a way I can output unhandled exceptions to a log file, not just in the executable but also from code in the dlls?

 

[Mikexx]

First of all may thank the contributors of this thread.

On further examination of the code, there are indeed a try catch block, where the result is effectively discarded. But I could see the exception in the Visual Studio Output tab window, hence the confusion.

In other words these are not unhandled exceptions.

Apologies for wasting contributor's time and thanks again.

 

[jmcilhinney]

Perhaps you now realise this but the Output window shows all exceptions that are thrown. The message about a "first chance" exception is when an exception is thrown, without regard for whether it will be caught after that or not.