using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string json = @"

        {

            'name': 'Object 1',

            'content': {

                'body': {

                    'id': 'body',

                    'type': 'Body'

                },

                'style': {

                    'id': 'style',

                    'type': 'Style'

                },

                'DynamicName-123': {

                    'id': 'DynamicName-123',

                    'type': 'Row'

                },

                'DynamicName-434': {

                    'id': 'DynamicName-434',

                    'type': 'Column'

                },

                'DynamicName-223': {

                    'id': 'DynamicName-223',

                    'type': 'Item'

                }

            }

        }";

​

        JObject obj = JObject.Parse(json);

        List<JObject> items = obj["content"]

            .Children<JProperty>()

            .Where(p => (string)p.Value["type"] == "Item")

            .Select(p => (JObject)p.Value)

            .ToList();

​

        foreach (JObject item in items)

        {

            Console.WriteLine("id: " + item["id"]);

            Console.WriteLine("type: " + item["type"]);

            Console.WriteLine();

        }

    }

}