using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        var json = @"{""ids"":[{""id"":1},{""id"":2}]}";

        var result = JsonConvert.DeserializeObject<Foo>(json);

        Console.WriteLine("ids: " + string.Join(",", result.MyIds.Select(id => id.ToString())));

        Console.WriteLine("\n");

        Console.WriteLine(JsonConvert.SerializeObject(result, Formatting.Indented));

    }

}

​

class Foo

{

    [JsonProperty("ids")]

    [JsonConverter(typeof(CustomArrayConverter<int>), "id")]

    public int[] MyIds { get; set; }

}

​

class CustomArrayConverter<T> : JsonConverter

{

    string PropertyName { get; set; }

    public CustomArrayConverter(string propertyName)

    {

        PropertyName = propertyName;

    }

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

    {

        JArray array = new JArray(JArray.Load(reader).Select(jo => jo[PropertyName]));

        return array.ToObject(objectType, serializer);

    }

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

    {

        IEnumerable<T> items = (IEnumerable<T>)value;

        JArray array = new JArray(items.Select(i => new JObject(new JProperty(PropertyName, JToken.FromObject(i, serializer)))));

        array.WriteTo(writer);

    }

    public override bool CanConvert(Type objectType)

    {

        // CanConvert is not called when the [JsonConverter] attribute is used

        return false;

    }

}

​