Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

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

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

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

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

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

Non-nullable property 'Name' 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.