This encorages the use of `Assert.Throws<T>` instead of the `typeof(T)` version.

This flags uses of `Assert.Equal / NotEqual` where the argument is
`true` or `false`.

This enforces the use of `Assert.Null` or `Assert.NotNull`

Fixes #38679

* Both columns added

* Genericize custom column names

* More changes to genericize

* Cleanup

* Respond to feedback

* WIP

* Change tuple to properties

* Restrict to just containing types

* Cleanup

* cleanup

* Refactor

* Change method for getting Containing Type and Member

* refactor GetAdditionalProperties

* Fix merge conflicts

* respond to feedback

* respond to feedback

* Change to struct

* Add type for AbstractCustomColumnDefinitionWithMultipleValues

* Cleanup

* Change AdditionalProperty to FindUsagesProperty

* respond to feedback

* respond to feedback

* Hide columns in F#

* respond to feedback

* fix merge conflict

* Change from hiding columns to removing columns for non supported langs

* Add additional implementations

* formatting

Add latest features

Make OrganizeImportsService public

Add ETW events for recovering syntax trees

Fix typo and add richer info to rename test failure message

Update immutable arrays of symbols in the NullabilityRewriter

Fixes #38735.

Use IContentType.IsOfType when checking for content type matches

Change the Using organizer to not use ElasticTrivia for the NewLine

Fixes #38711.

Co-Authored-By: NSam Harwell <sam@tunnelvisionlabs.com>

Addressed some minor PR feedback.

Add handling for unconventional implementation of events and properties when Default Interface Implementations are involved. (#38683)

Closes #34452.
Closes #34453.

Remove unnecessary nullable suppression

Export limited semantic model in liveshare scenario to avoid null ptrs

Workaround to unblock builds

Additional logging in the compiler server

Codefix and Code Refactoring for making local functions static