Possible null reference argument for parameter 'giftcards' in 'GiftCard[] GiftCardFilter.FilterByExpiryDate(GiftCard[] giftcards)'.

Possible null reference argument for parameter 'giftcards' in 'GiftCard[] GiftCardSorter.Sort(GiftCard[] giftcards)'.

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

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

Possible null reference argument for parameter 'deals' in 'DealEvent[] DealSorter.Sort(DealEvent[] deals)'.

Cannot convert null literal to non-nullable reference type.

Possible null reference argument for parameter 'giftcards' in 'GiftCard[] GiftCardFilter.FilterByExpiryDate(GiftCard[] giftcards)'.

Possible null reference argument for parameter 'giftcards' in 'GiftCard[] GiftCardSorter.Sort(GiftCard[] giftcards)'.

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