Possible null reference return.

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

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

Dereference of a possibly null reference.

The type 'TKey' cannot be used as type parameter 'TKey' in the generic type or method 'Dictionary<TKey, TValue>'. Nullability of type argument 'TKey' doesn't match 'notnull' constraint.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Nullability of reference types in value of type 'KeyValuePair<string, JsonNode?>' doesn't match target type 'KeyValuePair<string, JsonNode>'.

Converting null literal or possible null value to non-nullable type.