codeql/csharp/change-notes/2021-02-01-Preprocessor-directives.md

lgtm,codescanning

• The PreprocessorDirective class and its base classes have been added to support preprocessor directives, such as #if, #define, #undef, #line, #region, #warning, #error, #pragma warning, #pragma checksum and #nullable. Furthermore, #line directives are now taken into account when querying the location of any code construct. Files referenced in preprocessor directives are also included in the extraction sources. This change is expected to lead to better error reporting locations in generated code, such as generated code from .cshtml files in ASP.NET Core.