using System;

​

public class FeedComponenet {

    public void Write(IWriter writer) {

    }

}

​

public interface IBuilder {

    FeedComponenet Build();

}

​

public interface IWriter {

}

​

public interface IFeedBuilder<TBuilder, TWriter> where TBuilder : IBuilder, new() where TWriter : IWriter, new() {

    void BuildFeed();

}

​

public class PayFlexElegibilityBuilder<TBuilder, TWriter> : IFeedBuilder<TBuilder, TWriter> where TBuilder : IBuilder, new() where TWriter : IWriter, new()  {

    private IBuilder builder = new TBuilder();

    private IWriter writer = new TWriter();

    public void BuildFeed() {

        var feedComponent = builder.Build();

        feedComponent.Write(writer);

    }

}

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}