using System;

using System.Collections.Generic;

using System.Linq;

using DryIoc;

​

public interface MyInterface

{

    string Id { get; }

}

​

public class MyImpl : MyInterface

{

    public string Id { get; }

    public MyImpl(string id) => Id = id;

}

​

public class User

{

    public MyInterface Obj { get; }

    public User(string id, IEnumerable<KeyValuePair<string, MyInterface>> getObj)

        => Obj = getObj.First(kv => kv.Key == id).Value;

}

​

class Program

{

    static void Main()

    {

        Container container = new();

        container.RegisterInstance<MyInterface>(new MyImpl("A"), serviceKey: "A");

        container.RegisterInstance<MyInterface>(new MyImpl("B"), serviceKey: "B");

        container.Register<User>();

        var user = container.Resolve<Func<string, User>>()("A");

        Console.WriteLine(((MyImpl)user.Obj).Id);

    }

}