using System;

using System.IO;

using Newtonsoft.Json;

​

public class Program

{

    public static void Main()

    {

        var json = JsonConvert.SerializeObject(new[] {1,2,3,4,5});

        Console.WriteLine(json);

        JsonSerializer serializer = new JsonSerializer();

​

​

        using (StringWriter sw = new StringWriter())

        using (JsonWriter writer = new JsonTextWriter(sw))

        {

            serializer.Serialize(writer, new[] {1,2,3,4,5});

            Console.WriteLine(sw);

        }

    }

}