Strengthen the check that detects nullable lifting for a user-defined conversion during lowering.

Type comparison should ignore insignificant differences like tuple name mismatch, etc.
Fixes https://devdiv.visualstudio.com/DevDiv/_workitems?id=269808.

Compiler server should be tolerant of corrupted application settings

Make target type preselection less aggressive

Fix JSON remoting for CodeLens

Port https://github.com/dotnet/roslyn/pull/14289 to RC

Signature help improvements for C# tuples (renamed to work around jenkins issues)

Fixes https://github.com/dotnet/roslyn/issues/14085

Convert Naming Styles to a grid-based UI and enable rules by default

Add NamingPreferences to the SimplificationOptionProvider

When a machine.config or app.config is corrupted it's possible for `ConfigurationManager.AppSettings` to throw an exception.  The compiler server was not tolerant of such a failure and as a result would terminate immediately after startup.

The compiler workflow is generally very tolerant of failures in the server.  It is an optimization only, and any crashes, bad results, etc ... are ignored and the workflow will fall back to the command line.  Failing on startup is one case the workflow does not handle well right now.  The workflow does not distinguish between a crash at startup and a very slow JIT situation (as is the case with old, single core machines).  As such it ends up adding an unnecessary 25 second delay to the compilation.  Issue #14265 tracks fixing this delay but it won't make RC.

Up until now only one incident of corrupted app settings was reported and it was considered an extremely unlikely problem (as it would break a lot of apps).  Going through VS feedback last night I found one other incident which could would be explained by this problem.  Hence it's possible this is more likley than originally thought (although still very rare) and decided to put it into RC.

closes #14288

Handle TMP correctly in compiler server

Don't null ref if we can't find the host document in SetDocumentContext

Port https://github.com/dotnet/roslyn/pull/14251 to RC

Fixes internal bug #237579

This allows the VSI option resetter to reset the option (so that stale
default values aren't used).

fix null exception happening due to OOP analyzer engine not providing right AnalyzerOptions

Truncate resource string as it affects internal tooling.

Fix out of range exception when producing classified text for FindReferences

fixed 2 issue where IDE analyzer throws null exception and host analyzer exception message not going away from error list issue.

Updating our swr files to use 'Microsoft.Net.4.6.1.FullRedist.Resources' instead of 'Microsoft.Net.4.6.1.FullRedist.Resource'

Updating our swr files to use 'Microsoft.Net.4.6.1.FullRedist.Resources' instead of 'Microsoft.Net.4.6.1.FullRedist.Resource'

My forms completion

Delete reference to Microsoft.CodeAnalysis.Test.Resources.Proprietary

Add a test for https://devdiv.visualstudio.com/DevDiv/_workitems?id=278481.

This reverts commit 9f30b914.

Revert removal of MissingNamespaceId