Nullability of reference types in type of parameter 'data' of 'bool ViewLocator.Match(object data)' doesn't match implicitly implemented member 'bool IDataTemplate.Match(object? data)' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'data' of 'Control ViewLocator.Build(object data)' doesn't match implicitly implemented member 'Control? ITemplate<object?, Control?>.Build(object? param)' (possibly because of nullability attributes).

Partial method declarations 'void AppSettingsViewModel.OnShowBeatVisualSettingsChanged(bool value)' and 'void AppSettingsViewModel.OnShowBeatVisualSettingsChanged(bool show)' have signature differences.

Partial method declarations 'void AppSettingsViewModel.OnSelectedLanguageChanged(KeyValuePair<string, string> value)' and 'void AppSettingsViewModel.OnSelectedLanguageChanged(KeyValuePair<string, string> kv)' have signature differences.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Non-nullable field 'autoSaveTimer' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field '_vm' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field 'chartSettingsViewModel' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.