using System;

using System.Linq;

using System.Collections.Generic;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string json = @"

            {

                ""myFooDictionary"": 

                {

                    ""a"" : { ""3847"" : ""fizz"" },

                    ""b"" : { ""2409"" : ""bang"" },

                    ""c"" : { ""9031"" : ""pow""  },

                }

            }";

        var obj = JsonConvert.DeserializeObject<Bar>(json);

        foreach(var kvp in obj.MyFooDictionary)

        {

            Console.WriteLine(kvp.Key + ": " + kvp.Value.Id + " " + kvp.Value.Name);

        }

    }

}

​

class Bar

{

    [JsonProperty(ItemConverterType=typeof(FooConverter))]

    public Dictionary<string, Foo> MyFooDictionary { get; set; }

}

​

class Foo

{

    public int Id { get; set; }

    public string Name { get; set; }

}

​

class FooConverter : JsonConverter

{

    public override bool CanConvert(Type objectType)

    {

        return objectType == typeof(Foo);

    }

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

    {

        JObject obj = JObject.Load(reader);

        JProperty prop = obj.Properties().First();

        return new Foo { Id = int.Parse(prop.Name), Name = (string)prop.Value };

    }

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

    {

        throw new NotImplementedException();

    }

}

​

​