Inheritance with null objects

NullObjectInheritance.cs

public abstract class BaseClass
{
    protected ILogger Logger { get; }
    protected BaseClass(ILogger logger)
    {
        Logger = logger;
    }
}
public class ConcreteClass : BaseClass
{
    readonly ILoggerFactory _loggerFactory;
    public ConcreteClass(ILoggerFactory loggerFactory)
            : base((loggerFactory ?? NullLoggerFactory.Instance).CreateLogger<ConcreteClass>())
    {
        _loggerFactory = loggerFactory ?? NullLoggerFactory.Instance;
    }
}