using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var json = "{\"message\":null,\"referenceId\":\"bee746b1-c2b4-4f11-afa0-e18a816e5cfa\"}";

        var obj = JsonConvert.DeserializeObject<Response>(json);

        Console.WriteLine("obj.Message: " + obj.Message);

    }

}

​

​

class Response

{

    [JsonProperty("referenceId")]

    public Guid ReferenceId { get; set; }

    [JsonProperty("message")]

    public string Message { get; set; }

}