using System;

using System.Collections.Generic;

using YamlDotNet.Serialization;

using YamlDotNet.Serialization.ObjectFactories;

public class Program

{

    public static void Main()

    {

        // dummy to prove point of no default constructor

        IController controller = null;

        var fancyNode2 = new FancyNode(controller, "123abc");

        var fancyNode1 = new FancyNode(controller, "456def");

        fancyNode1.Children.Add(fancyNode2);

​

        var coolNode1 = new CoolNode()

        {

            ID = Guid.NewGuid(),

        };

        var coolNode2 = new CoolNode()

        {

            ID = Guid.NewGuid(),

        };

        var root = new CoolNode();

        root.Children.Add(fancyNode1);

        root.Children.Add(coolNode1);

        root.Children.Add(coolNode2);

        var serializerBuilder = new SerializerBuilder();

        serializerBuilder.EnsureRoundtrip();

        var serializer = serializerBuilder.Build();

        var yaml = serializer.Serialize(root);

        Console.WriteLine(yaml);

        var deserializerBuilder = new DeserializerBuilder();

        deserializerBuilder.WithObjectFactory(new NodeObjectFactory());

        var deserializer = deserializerBuilder.Build();

        try

        {

            var root2 = deserializer.Deserialize<Node>(yaml);

            Console.WriteLine("Deserialization was a success.");

        }

        catch

        {

            Console.WriteLine("Deserialization was a failure.");

        }

    }

}

​

public class Node

{

    public List<Node> Children

    {

        get;

        set;

    }

    public Node()

    {

        this.Children = new List<Node>();

    }

}

​

public class FancyNode : Node

{

    private IController controller;

    public string ID

    {

        get;

        private set;

    }

    // I would really like to get rid of this constructor

    public FancyNode()

    {

        throw new NotSupportedException();

    }

​

    // NOTICE: no default constructor here  

    public FancyNode(IController controller, string id)

    {

        this.controller = controller;

        this.ID = id;

    }

}

​

public class CoolNode : Node

{

    public Guid ID

    {

        get;

        set;

    }

}

​

public interface IController

{

}

​

public class NodeObjectFactory : IObjectFactory

{

    private readonly DefaultObjectFactory defaultFactory = new DefaultObjectFactory();

    public object Create(Type type)

    {

        if(type == typeof(FancyNode))

        {

            return new FancyNode(null, null);

        }

        return this.defaultFactory.Create(type);

    }

}

​