Facilitates writing package-specific properties and options into the solution file (.sln), and, conversely, the loading of properties and options from the file.
Assembly: Microsoft.VisualStudio.Shell.Interop (in Microsoft.VisualStudio.Shell.Interop.dll)
Persistence is managed by the solution, and so the interface is called through its associated service, SVsSolutionPersistence.
See illustrations of the implementation and/or calling of this interface in the sample Solution Extender.Notes to Callers:
Upon saving package-specific properties or options to the .sln file, or loading properties or options from the .sln file.