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

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

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

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

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

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

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

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

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