using System;

using System.Linq;

using System.Collections.Generic;

using Newtonsoft.Json.Linq;

​

public class Program

{

    public class Client

    {

        public string ID { get; set; }

        public string Description { get; set; }

        public string Name { get; set; }

    }

    public static void Main()

    {

        const string json_source = "{ \"count\": 3, \"value\": [ { \"id\": \"AAAAAAAAAAAAA\", \"description\": \"test1\", \"name\": \"name1\" }, { \"id\": \"BBBBBBBBBB\", \"description\": \"test2\", \"name\": \"name2\" }, { \"id\": \"CCCCCCCCCCCC\", \"description\": \"test3\", \"name\": \"name3\" } ] }";

        var jsonObject = JObject.Parse(json_source);

        var jsonObjectValue = jsonObject.SelectToken("value");

        var clients = jsonObjectValue.ToObject<List<Client>>();

        var clientWithName1 = clients.SingleOrDefault(x => x.Name == "name1");

        if (clientWithName1 != null)

            Console.WriteLine(clientWithName1.Description);

    }

}