using System;

using System.Text.Json;

using System.Text.Json.Serialization;

​

var i = new Item {

    Id = "item1",

    Name = "Clean",

    Description = "Clean your room!"

};

​

Console.WriteLine(JsonSerializer.Serialize(i));

​

public class Item

{

    [JsonPropertyName("id")]

    public string Id { get; set; }

    [JsonPropertyName("name")]

    public string Name { get; set; }

    [JsonPropertyName("description")]

    public string Description { get; set; }

    [JsonPropertyName("isComplete")]

    public bool Completed { get; set; }

}

​