AB#1255325
The Platform Compatibility Analyzer was introduced in .NET 5.0, raising new diagnostics when APIs are referenced that are unsupported on targeted platforms. At present, this analysis can only be performed as part of compilation, providing an experience for identifying unsupported API calls within the IDE or during a build.

The projects which benefit most from the annotations are large scale solutions with many dependencies which are usually not available as a source code implementation. If the same analysis performed by the Platform Compatibility Analyzer could be performed against binaries, we could further improve the impact of this tooling. The analysis could potentially be integrated with the .NET Portability Analyzer as well, helping those seeking to migrate from .NET Framework to identify not only which APIs are and are not available in .NET 5.0+, but which of those APIs were Windows-specific.