using System;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        string json = @"{ ""TransformMatrix"" : ""{ ""Foo"" : 1 }"" }";

        Item item = Item.FromJSON(json);

        Console.WriteLine(item.TransformMatrix.Foo);

    }

}

​

public class Item

{

    public TransformMatrix TransformMatrix { get; set; }

​

    public static Item FromJSON(string json)

    {

      JsonConverter[] converters = { new LineConverter(), new TransformMatrixConverter() };

      return JsonConvert.DeserializeObject<Item>(json, new JsonSerializerSettings()

      {

        Converters = converters

      });

    }

}

​

public struct TransformMatrix

{

    public int Foo { get; set; }

}

​

​

public class TransformMatrixConverter : JsonConverter

{

  public override bool CanConvert(Type objectType)

  {

      Console.WriteLine("CanConvert was called for " + objectType.Name);

      return typeof(TransformMatrix).IsAssignableFrom(objectType);

  }

​

  public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

  {

      throw new NotImplementedException("TransformMatrixConverter: ReadJson is not implemented");

  }

​

  public override bool CanWrite

  {

      get { return false; }

  }

​

  public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

  {

      throw new NotImplementedException("TransformMatrixConverter: WriteJson is not implemented");

  }

}

​

​

​

public class LineConverter : JsonConverter

{

  public override bool CanConvert(Type objectType)

  {

    return false;

  }

​

  public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

  {

    throw new NotImplementedException("LineConverter: ReadJson is not implemented");

  }

​

  public override bool CanWrite

  {

    get { return false; }

  }

​

  public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

  {

    throw new NotImplementedException("LineConverter: WriteJson is not implemented");

  }

}

​