public static void Main()
var data = DateTime.Parse("2023-12-07T17:26:52.976784+01:00");
Console.WriteLine(Serialize(data));
public static string Serialize(DateTime d){
var settings = new JsonSerializerSettings
DateFormatHandling = DateFormatHandling.IsoDateFormat,
DateTimeZoneHandling = DateTimeZoneHandling.Utc,
NullValueHandling = NullValueHandling.Ignore
return JsonConvert.SerializeObject(d, settings);