Fixes #18506

Don't show enum completion if text is typed after dot

Add .NET Core Unit Test templates to WellKnownProjectTemplates...

At this point the Concord project exists just to fix a signing issue in
the Debugger NuGet packages.

This project is causing problems in our port to the new SDK because it's
a Net 45 portable project that is referenced by Net 20 projects.  The
old build silently ignores this incompatibility but the new SDK takes
issue with it, and the method it uses to pass DLLs around.

Taking the simpler approach here of just fixing the signing issues (side
thread going with debugger team) and removing the project.

Squeeze more perf out of tree serialization/deserialization.

This was meant to be done as part of my rework of netci.groovy but it looks like I missed
it.

https://github.com/dotnet/roslyn/commit/8a078fac5c497b61f00505d3fe4cf0d92137bef3

Disable currently broken VSI tests

Include info about VisualStudioSetup.Next

fix VSI test break

Create a buffer with the right size.