Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

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

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

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

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

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

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

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

Possible null reference return.

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

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

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

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

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

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

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

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

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

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

'AtomTypes' is obsolete: 'Use ContentTypes class'

'AtomTypes' is obsolete: 'Use ContentTypes class'

'AtomTypes' is obsolete: 'Use ContentTypes class'

'AtomTypes' is obsolete: 'Use ContentTypes class'

'AtomTypes' is obsolete: 'Use ContentTypes class'

'AtomTypes' is obsolete: 'Use ContentTypes class'

'AtomTypes' is obsolete: 'Use ContentTypes class'

'AtomTypes' is obsolete: 'Use ContentTypes class'

'AtomTypes' is obsolete: 'Use ContentTypes class'