The IWeavingSymbolsService service allows you to push information from your aspect, at build time, to Visual Studio Tools for Metalama and PostSharp.
This service can be used in the following scenarios:
Adding a text to CodeLens and Intellisense tooltip of a declaration.
Adding code saving information.
Adding an annotation that means that Visual Studio Tools for Metalama and PostSharp should consider that a declaration has been decorated with a custom attribute. This annotation is then taken into account by the analytic engine that powers the real-time quick actions and diagnostics of Visual Studio Tools for Metalama and PostSharp. For instance, the FieldRule facility uses this feature.
To get an instance of this service, use the GetService<T>(bool) method from PostSharpEnvironment.CurrentProject.GetService.