using System;

public class Program

{

    public interface IReplica {

    }

    public interface ITopologyProvider {

        IReplica[] GetTopology(string name);

    }

    public interface ITopologyConfiguration {

        ITopologyConfiguration Add(string name, ITopologyProvider provider);

        ITopologyConfiguration Remove(string name);

    }

    public static class TopologyFactory {

        public static ITopologyProvider Create(Action<ITopologyConfiguration> configuration) {

        }

    }

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}