using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Serialization;

public class Program

{

    // The names of auto properties in the Poco class are serialized with "k__BackingField" in the name.

    // To fix this, change either one of the marked lines below.

    public static void Main()

    {

        var poco = new Poco { Id = 1, Name = "foo" };

​

        var resolver = new DefaultContractResolver 

        {

            IgnoreSerializableAttribute = false   // change this to true

        };

​

        var settings = new JsonSerializerSettings

        {

            Formatting = Formatting.Indented, 

            ContractResolver = resolver

        };

        string json = JsonConvert.SerializeObject(poco, settings);

        Console.WriteLine(json);

    }

}

​

[Serializable]  // comment out this line

class Poco

{

    public int Id { get; set; }

    public string Name { get; set; }

}