By default Invoke-WebRequest will fail if IE hasn't gone through first
configuration setup on the machine. Parts of our infrastructure don't
run IE and as a result our uses of Invoke-WebRequest were failing. Fixed
by passing the UseBasicParsing switch.

Recent builds of the SDK introduced a bug around referencing netstandard
1.6 projects. This trigged on several Roslyn projects and cause build
breaks with newer builds of VS.

Suppressing the check for now. Will undo when we move to 2.0 SDK

https://github.com/dotnet/roslyn/issues/21183

Remove Esent entirely from Roslyn.

Remove ignored flag

Set the CWD to the user profile dir, instead of current startup proj

No pattern matching with dynamic.

Preserve trivia better when converting if to switch.

Fix a couple of test running bugs

Place caret in parameter list when generating constructors.

Hitting a file lock issue caused by parallel builds

Remove PackageTargetFallback that was necessary due to non-netstandard debugger packages

Correctly deduplicate metadata references for lightweight projects

This broke in #21146, but the mac build was not tested.

Changes the VS integration tests to use the common dump directory that
all of our other infrastructure uses. Make it easy to debug failures
when all of the dump files are in the same directory.

This is a follow-up to PR #21146, which was unable to be merged without
keeping this flag ignore.

Move logic from the Makefile to either cibuild.sh or build/scripts

Disable GenerateTypeDialog tests

Replaces all the functionality that the old LambdaRewriter.Analysis visitors had and uses the new Scope tree instead. The first commit replaces most of the functionality while asserting equivalence with the old visitors, and the second commit removes all the old visitors and deletes the assertions.

This diagnostic is non-fatal but throws off a lot of developers who look
at runtests.log. Avoid generating it by checking for directory existance
before asking for files.

Would be much better if we had non-throwing IO operations so we could
avoid unnecessary Exists calls.

They've been hanging the VS integration tests. I think CSharpToBasic or
BasicToCSharp is the culprit (can't remember which I've seen).

Handle navigation to a doc ID without a corresponding doc

Duplicate functionality of existing LambdaRewriter.Analysis visitors
with the new Scope tree visitors and assert that the same results are
produced.

Add WorkItem attribute to SigHelp test

Ignoring until the netci.groovy change gets merged, at which point
another PR can be made to remove this ignore.

Disable Basic EE integration tests

Enable xunit analyzers

Also update a couple docs to reflect more modern information. Docs are
very out of date at this point, and a review pass should probably be
done.