'DataTableCSVParser.EnumerableToDataTable(IEnumerable<char>, IDictionary<string, DataColumn>, IDictionary<Type, Func<string, object>>, IEnumerable<string>)': not all code paths return a value

Process completed with exit code 1.

The following actions uses node12 which is deprecated and will be forced to run on node16: 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/