The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

Use IHeaderDictionary.Append or the indexer to append or set headers. IDictionary.Add will throw an ArgumentException when attempting to add a duplicate key. (https://aka.ms/aspnet/analyzers)

Use IHeaderDictionary.Append or the indexer to append or set headers. IDictionary.Add will throw an ArgumentException when attempting to add a duplicate key. (https://aka.ms/aspnet/analyzers)

Use IHeaderDictionary.Append or the indexer to append or set headers. IDictionary.Add will throw an ArgumentException when attempting to add a duplicate key. (https://aka.ms/aspnet/analyzers)

Use IHeaderDictionary.Append or the indexer to append or set headers. IDictionary.Add will throw an ArgumentException when attempting to add a duplicate key. (https://aka.ms/aspnet/analyzers)

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

Remove this unread private field '_logger' or refactor the code to use its value. (https://rules.sonarsource.com/csharp/RSPEC-4487)

Rename class 'PDPAppSI' to match pascal case naming rules, consider using 'PdpAppSi'. (https://rules.sonarsource.com/csharp/RSPEC-101)

Remove this unread private field '_logger' or refactor the code to use its value. (https://rules.sonarsource.com/csharp/RSPEC-4487)

Rename interface 'IPDP' to match pascal case naming rules, consider using 'IPdp'. (https://rules.sonarsource.com/csharp/RSPEC-101)

Add a 'protected' constructor or the 'static' keyword to the class declaration. (https://rules.sonarsource.com/csharp/RSPEC-1118)

Add a 'protected' constructor or the 'static' keyword to the class declaration. (https://rules.sonarsource.com/csharp/RSPEC-1118)

'int' should not be explicitly used as the underlying type. (https://rules.sonarsource.com/csharp/RSPEC-1939)

Remove the field '_httpContextAccessor' and declare it as a local variable in the relevant methods. (https://rules.sonarsource.com/csharp/RSPEC-1450)