Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, actions/setup-dotnet@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Nullability of reference types in type of parameter 'x' of 'int BlockHeaderComparer.Compare(BlockHeader x, BlockHeader y)' doesn't match implicitly implemented member 'int IComparer<BlockHeader>.Compare(BlockHeader? x, BlockHeader? y)' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'y' of 'int BlockHeaderComparer.Compare(BlockHeader x, BlockHeader y)' doesn't match implicitly implemented member 'int IComparer<BlockHeader>.Compare(BlockHeader? x, BlockHeader? y)' (possibly because of nullability attributes).

Possible null reference return.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

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

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

Possible null reference assignment.

Possible null reference return.