using System;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {   

        dynamic o = JsonConvert.DeserializeObject(GetJsonData());

        Console.WriteLine(o.type == null);

        Console.WriteLine(o.ContainsKey("features"));

        Console.WriteLine(o.features[0].ContainsKey("Holly"));

    }

    public static string GetJsonData(){

        return @"

        {

            'type': 'FeatureCollection',

            'features': [

                {

                'type': 'Feature',

                'geometry': {

                    'type': 'Point',

                    'coordinates': [102.0, 0.5]

                },

                'properties': {

                    'prop0': 'value0'

                }

                },

                {

                'type': 'Feature',

                'geometry': {

                    'type': 'LineString',

                    'coordinates': [

                    [102.0, 0.0],

                    [103.0, 1.0],

                    [104.0, 0.0],

                    [105.0, 1.0]

                    ]

                },

                'properties': {

                    'prop0': 'value0',

                    'prop1': 0.0

                }

                },

                {

                'type': 'Feature',

                'geometry': {

                    'type': 'Polygon',

                    'coordinates': [

                    [

                        [100.0, 0.0],

                        [101.0, 0.0],

                        [101.0, 1.0],

                        [100.0, 1.0],

                        [100.0, 0.0]

                    ]

                    ]

                },

                'properties': {

                    'prop0': 'value0',

                    'prop1': {

                    'this': 'that'

                    }

                }

                }

            ]

            }

        ";

    }

}