Wire and inject NLog into .NET Core console app

Question

I created a consumer/job that I will have running as a process on Linux written in C#.

The process will:

1. Read a message from RabbitMQ
2. Make chang

Answer 1

In DotNet Core 2 you can use the start up class now and clean up the code a bit to look more like the web one.

And as a bonus a way to start your app inside the DI container using ConsoleApp

Program.cs

static void Main(string[] args)
{
    IServiceCollection services = new ServiceCollection();

    Startup startup = new Startup();
    startup.ConfigureServices(services);

    IServiceProvider serviceProvider = services.BuildServiceProvider();

    // entry to run app
    serviceProvider.GetService().Run();
}

Startup.cs

public class Startup
{
    IConfigurationRoot Configuration { get; }

    public Startup()
    {
        var builder = new ConfigurationBuilder()
          .SetBasePath(Directory.GetCurrentDirectory())
          .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

        Configuration = builder.Build();
    }


    public void ConfigureServices(IServiceCollection services)
    {
        services.AddSingleton(Configuration);

        services.AddSingleton();

        services.AddLogging(loggingBuilder => {
           loggingBuilder.AddNLog("nlog.config");
        });

        services.AddTransient();
    }
}

ConsoleApp.cs

public class ConsoleApp
{
    private readonly ILogger _logger;
    private readonly IMyConfiguration _config;

    public ConsoleApp(IMyConfiguration configurationRoot, ILogger logger)
    {
        _logger = logger;
        _config = configurationRoot;
    }


    public void Run()
    {
        var test = _config.YourItem;

        _logger.LogCritical(test);

        System.Console.ReadKey();
    }
}

Configuration.cs

public class MyConfiguration : IMyConfiguration
{

    IConfigurationRoot _configurationRoot;
    public MyConfiguration(IConfigurationRoot configurationRoot)
    {
        _configurationRoot = configurationRoot;
    }

    public string YourItem => _configurationRoot["YourItem"];
}


public interface IMyConfiguration
{
    string YourItem { get; }
}