using System;
using System.Collections.Generic;
using Newtonsoft.Json;


public class Program
{
public static void Main()
{
Messsage m = new Messsage();
m.AppId = "1234";
m.Data.Add("title", "عنوان");
m.Data.Add("content", "ین یک متن تست می باشد");
string json = JsonConvert.SerializeObject(m, Formatting.Indented);
Console.WriteLine(json);
}
}


class Messsage
{
public String AppId { get; set; }


public Dictionary<string, string> Data { get; set; } = new Dictionary<string, string>();
}