ConsoleApp_v4_1.cs

// You can use full feature of Generic Host(same as ASP.NET Core).

var builder = ConsoleApp.CreateBuilder(args);
builder.ConfigureServices((ctx,services) =>
{
    // Register EntityFramework database context
    services.AddDbContext<MyDbContext>();

    // Register appconfig.json to IOption<MyConfig>
    services.Configure<MyConfig>(ctx.Configuration);
});

var app = builder.Build();

// setup many command, async, short-name/description option, subcommand, DI
app.AddCommand("calc-sum", (int x, int y) => Console.WriteLine(x + y));
app.AddCommand("sleep", async ([Option("t", "seconds of sleep time.")] int time) =>
{
    await Task.Delay(TimeSpan.FromSeconds(time));
});
app.AddSubCommand("verb", "childverb", () => Console.WriteLine("called via 'verb childverb'"));

// You can insert all public methods as sub command.
app.AddSubCommands<DatabaseApp>();

app.Run();