Non-nullable field '_containerName' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Possible null reference assignment.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Non-nullable property 'MembershipStart' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

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

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

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

Cannot convert null literal to non-nullable reference type.