The variable '_' is declared but never used

Nullability of reference types in type of parameter 'other' of 'int ExhaustionDate.CompareTo(ExhaustionDate other)' doesn't match implicitly implemented member 'int IComparable<ExhaustionDate>.CompareTo(ExhaustionDate? other)' (possibly because of nullability attributes).

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

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

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

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

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

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

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