using System;

using Newtonsoft.Json;

​

public class Program

{

    public static void Main()

    {

        var data = new BookingJsonModel() 

        {

           FooBar = Guid.NewGuid(),

           BlahBlubb = "blub"

        };

        JsonSerializerSettings settings = new JsonSerializerSettings();

        settings.Formatting = Formatting.Indented;

        settings.ContractResolver = new  Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver();

        var body =  Newtonsoft.Json.JsonConvert.SerializeObject(data, settings);

        Console.WriteLine(body);

    }

    [JsonObject(Title = "booking")]

    public class BookingJsonModel

    {

        //[JsonProperty("id")]

        public Guid FooBar { get; set; }

​

        //[JsonProperty("reference")]

        public string BlahBlubb { get; set; } = null!;

    }

}