C# private, static, and readonly

Question

I was reviewing some code for log4net and I came across this.

private static readonly ILog logger = LogManager.GetLogger(typeof(AdminClient));

Answer 1

I think you're misunderstanding static. Static doesn't mean "can't be used outside the file." Static means: there's one per class. What this declaration does is creates a logger that is only allocated once (static), only available in the class (not in derived classes either) (private), and cannot be written to past its initialization (readonly).

Good question though!