The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions/setup-dotnet@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

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

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

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

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

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

Possible null reference return.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'value' in 'void BinaryWriter.Write(string value)'.

Dereference of a possibly null reference.