Weird exception when trying to use Dependency Injection in an Azure Function

Question

Given a File->New->Azure Functions v2 App, I\'m trying to get a reference to either an ILoggerFactory or an ILogger.

I\'m doing th

Answer 1

It seems that some infrastructure (e.g. IFileLoggingStatusManager) necessary for HostFileLoggerProvider is not set up yet at the time you are creating the dependency injection container and attempt to resolve the logger in the StartUp class. I think you should delay logging until after the application has fully started.

If you look at the startup code of WebJobs you'll see that the logger gets added first, after that the external startup gets executed and finally the required logging services gets added. Which is the wrong order for your case.