Serialization/Deserialization in .net core 5.0

There is problem during Json deserialization for list of TvShows which were previously serialized in .net core 5.0 using serializer from System.Text.Json:

var jsonStr = JsonSerializer.Serialize(obj); // obj is List<TvShow>

I got error message:

Newtonsoft.Json.JsonSerializationException: ‘Could not create an instance of type TMDbLib.Objects.Changes.ChangeItemBase. Type is an interface or abstract class and cannot be instantiated. Path ‘[19].Changes.Changes[0].Items[0].Action’, line 1, position 434211.’

[LordMike]

I’ve refactored the serialization into a new ITMDbSerializer interface. This change removes all Newtonsoft.Json from all API surfaces…

• The constructor will no longer take a JsonSerializer
• The Newtonsoft.Json dependency is hidden, so it is no longer transient
• There is a TMDbJsonSerializer.Instance which has the internal serializer

[lewishenson]

Ah good to know thanks. I might take a look this weekend then.