Simple MongoDB ObjectId Converter for the System.Text.Json json serializer

ObjectIdConverter.fs

type ObjectIdConverter() =
    inherit JsonConverter<ObjectId>()

    override _.Read(reader: byref<Utf8JsonReader>, typeToConvert: Type, options: JsonSerializerOptions) =
        ObjectId.Parse(reader.GetString())

    override _.Write(writer: Utf8JsonWriter, value: ObjectId, options: JsonSerializerOptions) =
        writer.WriteStringValue(value.ToString())