https://docs.microsoft.com/en-us/dotnet/api/system.text.json.serialization.referencehandler-1?view=net-10.0&viewFallbackFrom=net-9.0-pp
ReferenceHandlerT Class (System.Text.Json.Serialization) | Microsoft Learn
Defines how the JsonSerializer deals with references on serialization and deserialization.
class systemjson serializationtextmicrosoftlearn