using System;

using Microsoft.Extensions.DependencyInjection;

public class Program

{

    public static void Main()

    {

        var services = new ServiceCollection();

        services.AddSingleton<IConfiguration, Configuration>();

        services.AddTransient<GRequestModel.Factory>(serviceProvider => 

            (string res, string remip) => new GRequestModel(serviceProvider.GetRequiredService<IConfiguration>(), res, remip));

        services.AddTransient<SomeOtherClass>();

        var provider = services.BuildServiceProvider();

        var testClass = provider.GetRequiredService<SomeOtherClass>();

        testClass.ResolveGRequestModel();

    }

}

​

public interface IConfiguration

{

}

​

public class Configuration : IConfiguration

{

}

​

public class GRequestModel

{

    public delegate GRequestModel Factory(string res, string remip);

    public GRequestModel(IConfiguration configuration, string res, string remip)

    {

        Console.WriteLine($"Got {res} and {remip}.");

        Console.WriteLine($"Configuration has value?: {configuration != null}");

    }

}

​

public class SomeOtherClass

{

    private readonly GRequestModel.Factory _grequestFactory;

    public SomeOtherClass(GRequestModel.Factory grequestFactory)

    {

        _grequestFactory = grequestFactory;

    }

    public void ResolveGRequestModel()

    {

        GRequestModel grm = _grequestFactory("resValue", "remipValue");

    }

}