using System;

using System.Text;

using System.IO;

using System.Globalization;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(Convert(new x(), new JsonSerializerSettings{Formatting = Formatting.Indented}));

    }

    static string Convert(object value, JsonSerializerSettings settings)

    {

        JsonSerializer jsonSerializer = JsonSerializer.CreateDefault(settings);

        StringBuilder sb = new StringBuilder(256);

        StringWriter sw = new StringWriter(sb, CultureInfo.InvariantCulture);

        using (var jsonWriter = new MyWriter(sw))

        {

            jsonWriter.Formatting = jsonSerializer.Formatting;

​

            jsonSerializer.Serialize(jsonWriter, value, null);

        }

​

        return sw.ToString();

    }

}

class x

{

    public string y = "hello";

}

​

class MyWriter : JsonTextWriter

{

    public MyWriter(TextWriter sw) : base(sw)

    {

    }

​

    protected override void WriteIndentSpace()

    {

    }

}