using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var json = "{\"name\": \"name1\",\"fields\": [{\"id\": \"4786182461\",\"name\": \"field1\",},{\"id\": \"41241241122\",\"name\": \"field2\",}, ]}";

        var result = JsonConvert.DeserializeObject<Test>(json);

        Console.WriteLine(result.Name);

        Console.WriteLine(result.Fields.Count);

    }

​

    public class Test

    {

        public string Name;

        public List<Field> Fields;

    }

    public class Field

    {

        public string id;

        public string name;

    }

}