Worked on improving platform compatibility analysis within the dotnet/sdk repository, focusing on enhancing the accuracy of compatibility checks for MacCatalyst and other guarded platforms. Addressed a bug in the platform compatibility analyzer by refining how platform-specific attributes are respected during call-site analysis, which reduced inaccuracies in compatibility reporting. Utilized C# for code analysis and API development, implementing a targeted fix that improved the reliability of platform support decisions for developers. This work involved debugging a nuanced cross-platform attribute handling issue, collaborating across teams, and ensuring that the analyzer correctly interprets platform attributes to support robust, maintainable .NET SDK development.