Merge pull request #42 from tobbie/develop · tobbie/c-sharp-algorithms@b516fa9

Cannot convert null literal to non-nullable reference type.

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

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

Possible null reference return.

Possible null reference return.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

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

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

Possible null reference argument for parameter 'node' in 'void LFUCache.EvictItem(LinkedListNode<Item> node)'.

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