* add regression test for buffered source resolver

* change assert

Simplify reference manager code.

Simplify our delay-loaded services.

Allow ContainedDocument to be created for CPS project hierarchy

move RemoteHost down to workspace layer

Fix crash when finalizing compilations.

Fixes #14089

Finish teh work to use pooled array builders.

Merge dev15-preview-5 into master

made checksum builder to resilient to missing data such as compilatio…

Pool array builders so we produce less garbage.

Switch to using ImmutableArrays in findrefs.

made checksum builder to resilient to missing data such as compilation/parse options which some projects such as typescript don't have.

also made creating solution to only include project type workspace knows about to create.

some of these will change once checksum moves into solution state itself, but the concept of having Null data will remain to support projects that don't have all data or filtering out projects that workspace doesn't know how to craete.

(thank you @keyboardDrummer!)

This merge throws away the disabling of out-of-process analysis that was
made in dev15-preview-5, leaving it enabled in master.

Ensure we dont' try to remove both a parent and child from the tree when moving a type.

Fixes #13969

Fix usings in CSharpTypeStyleDiagnosticAnalyzerBase

Reanalyze on CodeStyleOptions changed

turn off OOP by default

The important part is that we don't create these services until they are needed.
We don't need complicated logic about later on disabling them.  The current logic
attempts to disable them when the same packages that loaded them, get unloaded.
But packages only get unloaded when VS is shutting down. And we don't need to
do complex work in that case as our entire environment is going away.

--

In other words, we had complexity around returning teh service to an 'unstarted'
state just so it could be started up later.  But it will never be the case that
we'll ever start the service up again as the only reason we moved it to 'unstarted'
was because VS was shutting down.

Make the logging service async.  That way we can move package update out of proc while still logginc to the VS log in a non-blocking fashion

Make the logging service async.  That way we can move package update out of proc while still logginc to the VS log in a non-blocking fashion.

removed allocation caused by concurrent dictionary

set roslyn service hub process to have below normal process priority

Support tuple element names in locals and expressions in VB EE