using System;

using System.Collections.Generic;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string result = @"

            {

              ""HasError"": false,

              ""Response"": {

                ""Value"": 1821.06,

                ""Tax"": 115.94,

                ""Itens"": [

                  {

                    ""Description"": ""TEST CLIENT"",

                    ""ID"": 887052

                  },

                  {

                    ""Description"": ""TEST CLIENT"",

                    ""ID"": 887053

                  }

                ]

              }

            }";

        var jsonObject = JObject.Parse(result)["Response"];

​

        var value = (decimal)jsonObject["Value"];

        var tax = (decimal)jsonObject["Tax"];

        var itens = (JArray)jsonObject["Itens"];

​

        var description = new List<string>();

        var id = new List<int>();

​

        foreach (var item in itens)

        {

            description.Add((string)item["Description"]);

            id.Add((int)item["ID"]);

        }

​

        Assert.NotNull(value);

        Assert.NotNull(tax);

​

        foreach (var d in description) Assert.That(d == "TEST CLIENT");

​

        foreach (var i in id) Console.WriteLine(i);     

    }

}

​

public static class Assert

{

    public static void NotNull(object value)

    {

        if (value == null) Console.WriteLine("value is null!");

    }

    public static void That(bool value)

    {

        if (!value) Console.WriteLine("assertion failed!");

    }

}