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

Possible null reference argument for parameter 'source' in 'ProductOrder? Enumerable.FirstOrDefault<ProductOrder>(IEnumerable<ProductOrder> source, Func<ProductOrder, bool> predicate)'.

Dereference of a possibly null reference.

Nullable value type may be null.

Nullable value type may be null.

Possible null reference assignment.

Dereference of a possibly null reference.

Dereference of a possibly null reference.

Nullable value type may be null.

Dereference of a possibly null reference.