using System;

//using System.Text;

using System.Net;

using System.Net.Http;

using System.Net.Http.Json;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var response = new HttpResponseMessage(HttpStatusCode.OK);

        //response.Content = new StringContent("Hello WORLD", Encoding.UTF8, "application/json");

        response.Content = JsonContent.Create("Hello WORLD");   

        var responseInJson = JsonConvert.SerializeObject(response, Formatting.Indented);

        responseInJson.Dump();

    }

}