ASP.NET Core Web API Logging from a Static Class

Solution is to have a static reference to the LoggerFactory in a utility static class initialized on startup:

/// <summary>
/// Shared logger
/// </summary>
internal static class ApplicationLogging
{
    internal static ILoggerFactory LoggerFactory { get; set; }// = new LoggerFactory();
    internal static ILogger CreateLogger<T>() => LoggerFactory.CreateLogger<T>();        
    internal static ILogger CreateLogger(string categoryName) => LoggerFactory.CreateLogger(categoryName);
}

Which you initialize on Startup.cs:

public Startup(ILogger<Startup> logger, ILoggerFactory logFactory, IHostingEnvironment hostingEnvironment)
{
    _log = logger;
    _hostingEnvironment = hostingEnvironment;
    Util.ApplicationLogging.LoggerFactory = logFactory;//<===HERE
}

Then you can build a logger to use from your static class like so:

internal static class CoreJobSweeper
{
    private static ILogger log = Util.ApplicationLogging.CreateLogger("CoreJobSweeper");
}