[3rd party] Getting current project information

[spouliot]

Environment Data

C# Extension version: 2.0.212

Issue

For more context this is a follow up issue to [3rd party] Detecting solution/project changes

From a WorkspaceInformationUpdated notification an extension was able, in 1.x, to get basic project information like what's available inside MsBuildWorkspaceInformation. However this relies on the OmniSharp server and is not available in 2.x (at least not if we want C# Dev Kit to be available).

In 2.x this seems to be handled by the new Roslyn language server but there's no (unless I missed it) way to talk with it from outside the C# extension.

How can another extension stays in sync with the C# extension ?