bump to 500

Gracefully handle exceptions in code fixer creation

Merge release/dev16.7 to master

Implement compiler /warnversion flag and one "wave" warning

Fix KeyNotFound exception in RemoveUnnecessaryInlineSuppressionsDiagn…

Fix confusing use of GetService extensions with different behavior

* Attempted Fix

* PR Changes

Merge release/dev16.7 to master

Fixes #46047

#45765 enhance this analyzer to support detecting unnecessary inline SuppressMessageAttribute suppressions. This led to a regression when processing idToPragmasMap for unhandled IDs, which is fixed by this change.

Classify ??= as an operator.

Improve mention of IDE experience scenario so that it links to it.
Acknowledge trailing JSON comma. Fix FileTransformGenerator example
indent.

Remove reference to non-existing VisualStudioInteractiveComponents.vsix from deployment VSIX. (#45979)

Fixes Roslyn preview installer.

Remove c#_lsp from tools options

Microsoft.Net.Compilers.Toolset
 From Version 3.8.0-1.20353.1 -> To Version 3.8.0-1.20361.1
Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

Skip HighlightRefsMultipleSubmisionsVerifyRenameTags tests

Add used assembly references feature branch to publishData

Clean up compiler logging

The compiler logging support primarily helped with identifying issues
with the underlying protocol. That was an area of problem in the initial
compiler server development and a sensible logging scenario.

Now though the underlying protocol isn't really an issue for the server.
The bigger issue is tracking the underlying state transitions of the
server and the reasons for making such transitions. This PR moves our
logging to match this new reality.

Include information why symbol key resolution has failed to help with debugging.

Merge release/dev16.7 to master

Reduce nested testing level in x86 release E2E tests.

Fixes #37165

Add analyzer action for reporting diagnostics in additional files

Improvement to completion for unimported extension methods