using System;

using DryIoc;

​

public class Program

{

    public static void Main()

    {

        var container = new Container();

        container.Register<ILogger, NullLogger>();

        const string mainConfigName = "foo";

        container.RegisterInstance(mainConfigName, serviceKey: nameof(mainConfigName));

        container.Register<MainDB>(Reuse.Transient, Made.Of(() => new MainDB(Arg.Of<string>(nameof(mainConfigName)), Arg.Of<ILogger>())));

        //container.RegisterInstance<MainDB.Connector>(() => container.Resolve<MainDB>());

        // Here is just the proxy wich resolves the Func<MainDB> and casts its Invoke method to the result delegate type

        container.RegisterDelegate<Func<MainDB>, MainDB.Connector>(f => f.Invoke);

        var connector = container.Resolve<MainDB.Connector>();

        Console.WriteLine($"Hello {connector()}");

    }

​

    public class MainDB

    {

        public delegate MainDB Connector();

        public MainDB(string cfgName, ILogger logger)

        {

        }

    }

​

    public interface ILogger

    {

    }

​

    public class NullLogger : ILogger

    {

    }

}