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

What the developer is saying is that when they call logger.Info(...) in any instance of this class they want to use a common (static) instance (so don't need to create a new logger per class instance), they want to be certain that it hasn't changed since it was created (readonly) and if we are in virtual function in a derived class then I want to make sure I don't use the base class one by mistake (private).