ubuntu-latest pipelines will use ubuntu-24.04 soon. For more details, see https://github.com/actions/runner-images/issues/10636

Possible null reference assignment.

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

Non-nullable field '_allowedTags' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Dereference of a possibly null reference.

Field 'HtmlSanitizer._allowedTags' is never assigned to, and will always have its default value null

Declare types in namespaces (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1050)

Declare types in namespaces (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1050)

Declare types in namespaces (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1050)

Declare types in namespaces (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1050)