using System;

using Microsoft.Extensions.DependencyInjection;

using Microsoft.Extensions.Logging;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        IServiceProvider serviceProvider = ContainerConfiguration.Configure(services =>

        {

            services.AddTransient<LogTest>();

        }

​

        );

        LogTest logTest = serviceProvider.GetService<LogTest>();

        logTest.LogStuff();

    }

}

​

internal static class ContainerConfiguration

{

    public static IServiceProvider Configure(Action<IServiceCollection> configuration = null)

    {

        var services = new ServiceCollection().AddLogging(logging =>

        {

            logging.ClearProviders();

            logging.AddConsole();

        }

​

        ).Configure<LoggerFilterOptions>(c => c.MinLevel = LogLevel.Trace);

        configuration?.Invoke(services);

        return services.BuildServiceProvider();

    }

}

​

internal class LogTest

{

    ILogger<LogTest> logger;

    public LogTest(ILogger<LogTest> logger = null)

    {

        this.logger = logger;

    }

​

    public void LogStuff()

    {

        logger?.LogCritical("This is a critical log");

    }

}