The following actions uses node12 which is deprecated and will be forced to run on node16: actions/cache@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v3, actions/setup-dotnet@v3, actions/cache@v2. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Dereference of a possibly null reference.

Dereference of a possibly null reference.

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

Possible null reference return.

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

Possible null reference return.

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

Nullability of reference types in return type of 'IEnumerable<int>? TwoSum.HussyDryRun(int[] n, int t)' doesn't match the target delegate 'TwoSum.TestFunction' (possibly because of nullability attributes).

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