Without using a dependency injection, it was possible to create a logger using the LoggerFactory, such as

var loggerFactory = new LoggerFactory();
loggerFactory.AddConsole().AddDebug();
ILogger<Program> logger = loggerFactory.CreateLogger<Program>();

https://github.com/ProfessionalCSharp/ProfessionalCSharp7/blob/master/Diagnostics/LoggingSample/LoggingWithoutDI/Program.cs

As the extension methods for ILoggerFactory are now obsolete, how can a logger created without a DI container?