using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        var json = GetBody();

        var blocks = JsonConvert.DeserializeObject<Blocks>(json, new DataConverter());

        foreach (var block in blocks.Value)

        {

            block.Block.Data.Dump();

        }

    }

​

    public class DataConverter : JsonConverter

    {

        public override bool CanConvert(Type objectType) => typeof(Data).IsAssignableFrom(objectType); 

​

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

        {

            var obj = JObject.Load(reader);

            var dataType = (string)obj["Type"];

            var item = new Data();

            switch(dataType)

            {

                case "Header": 

                    item = new HeaderType();

                    break;

                case "Body": 

                    item = new BodyType();

                    break;

                case "Footer": 

                    item = new FooterType();

                    break;

            }

​

            serializer.Populate(obj.CreateReader(), item);

            return item;

        }

​

        public override bool CanWrite => false;

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer) => throw new NotSupportedException();

    }

​

    private static string GetBody()

    {

        return "{\"nextLink\":\"NextLink\",\"value\":[{\"Block\":{\"BlockName\":\"Name\",\"BlockClass\":\"Class\",\"IsVisibile\":true,\"Data\":{\"Type\":\"Footer\",\"Values\":[{\"Property1\":\"Property1\",\"Property2\":\"Property2\"}],\"Show\":false}}},{\"Block\":{\"BlockName\":\"Name\",\"BlockClass\":\"Class\",\"IsVisibile\":true,\"Data\":{\"Type\":\"Header\",\"Title\":\"Main title\",\"Subtitle\":\"Subtitle\"}}},{\"Block\":{\"BlockName\":\"Name\",\"BlockClass\":\"Class\",\"IsVisibile\":true,\"Data\":{\"Type\":\"Body\",\"Information\":\"Info\",\"AdditionalText\":\"More text\",\"Projects\":[\"Project1\",\"Project2\"]}}}]}";

    }

​

    public class Blocks

    {

        public string NextLink { get; set; }

​

        public Response[] Value { get; set; }

    }

​

    public class Response

    {

        public Block Block { get; set; }

    }

​

    public class Block

    {

        public string BlockName { get; set; }

​

        public string BlockClass { get; set; }

​

        public bool IsVisible { get; set; }

​

        public Data Data { get; set; }

    }

​

    public class Data

    {

        public string Type { get; set; }

    }

​

    public class FooterType : Data

    {

        public bool Show { get; set; }

​

        public IEnumerable<object> Values { get; set; }

    }

​

    public class HeaderType : Data

    {

        public string Title { get; set; }

​

        public string Subtitle { get; set; }

    }

​

    public class BodyType : Data

    {

        public string Information { get; set; }

​

        public string AdditionalText { get; set; }

​

        public IEnumerable<object> Projects { get; set; }

    }

}