using System.Collections.Generic;
public static void Main()
var dto = new Dto { Id = "aaaaaa" };
dto.Dic.Add("key1", "aaaa");
dto.Dic.Add("key2", "bbbb");
var json = System.Text.Json.JsonSerializer.Serialize(dto);
public string Id { get; set; }
public Dictionary<string, string> Dic = new Dictionary<string, string>();