We expose public APIs on IOperation related analysis contexts to fetch ControlFlowGraph for the operation block. Additionally, the analyzer driver caches the CFGs for operation block (when first requested by some flow based analyzer) to allow sharing CFGs between flow based analyzers. However, we were holding onto these for the entire lifetime of the compilation. This change fixes that by removing the CFG entry once a particular operation block has been fully analyzed.

Fixes VSFeedback issue [#998181](https://dev.azure.com/devdiv/DevDiv/_workitems/edit/998181)

* EnC: Compare document content before performing IO while stepping

* Feedback

Enable detection and addition of solution level .editorconfig as solu…

Use ConstructWithNullability in InferTypeInAwaitExpression since the inferred type may include nullable information (#39335)

The inferred type may include nullability information, and will fail to be recognized as a symbol without using the correct construct call.

Fixes #39333

Update src/VisualStudio/Core/Def/Implementation/ProjectSystem/AnalyzerConfigDocumentAsSolutionItemHandler.cs

Co-Authored-By: NJoey Robichaud <joseph.robichaud@microsoft.com>

* Do not wait for output writer thread to complete when aborting execution in IW

* Only join threads when testing

Enable virtual/override recommender on private protected members

* Update sln/csproj for generated ioperations
* Extract BoundMultiple[Using/Local]Declaration into an abstract base node
* Update VariableDeclarationGroupOperation for UsingDeclarations
* Implement CFG for using declarations
* Update and add tests

Add an IDE storage service benchmark

Move C#-specific shared code style options to CSharpCodeStyleOptions

Annotate remaining symbol interfaces

Fix IDE0009 false positive on local functions

Switch source writer entirely over to using interpolations.

Fixed incorrect IDE0044 (Make field readonly) when the field is accessed by refeference.

* EnC: Recover from unexpected exceptions in Emit, ReadChecksum

* Fix typo

Simplify C# syntax generators.