* EnC support of static local functions

* code review feedback

* StatementMatchingTests

* StatementEditingTests

* ActiveStatementTests

* tests with await

* code review feedback

* Emit tests

* Report rude edits for unsupported DIM operations

* Allow EnC tests to specify TFMs to build against

* EnC: test against netcoreapp30

* Test fixes

* Fix merge

* Top-level types enumeration refactoring

* Simplify DefinitionMap

* Include namespaces in synthesized definition map

* Add SynthesizedNamespaceSymbol

* Embedded Attributes

* Test synthesized attributes

* Clean up EnC tests

* Clean up symbol matcher tests

* Ref readonly return type, in parameter symbol matching tests

* Enable using ref readonly returns, in parameters, ref structs during debugging

* More tests

* ReadOnly struct members

* Fix langauge version mismatch

* Merge fix ups

* Feedback, skip tests

* Revert "Revert "Make compilation outputs available via a workspace service (#34809)""

This reverts commit f4892bc4.

* Handle non-absolute path set by VB Web App IntelliSense project

This reverts commit 3bdbd560.

This reverts commit 3bdbd560.

* Move EnC debug information reading to Features.

Encapsulate the logic in EditAndContinueMethodDebugInfoReader.

This updates the resource DLL which corrects the version of mscorlib for
the net45beta resource.

* Fixes mapping of active statement when changing ctor body from block to expression

* Fix GetAllAddedSymbolsAsync.

- Recover from unexpected exceptions.
- Ignore documents that do not belong to the project being emitted during EnC (these could be e.g. speculative documents created by code fix preview).

Change fields of DocumentAnalysisResults to properties to workaround a bug in the VIL that causes evaluation to fail on them, thus making it hard to see the values while debugging Roslyn.

# Conflicts:
#	src/EditorFeatures/TestUtilities2/Intellisense/TestState.vb

* Source changes for unmanaged (PROTOTYPE for metadata)

* Modreqs for unmanaged as well

* Finished roundtripping metadata

* Added more tests

* Fix CI

* More tests

* Clean up

* Active Statement Handling

* Start active statement tracking on background thread

* Ensure XAPI is initialized before calling Concord APIs.

* Fix up and add comments

* Call UninitializeThread in VisualStudioActiveStatementProvider

* Fixes

* PR feedback

* Use dispose pattern for debugger thread initialization

* Finish test

* PR feedback

* Do not track active statements in projects that do not support Roslyn EnC service (e.g. F#)

* Update comment.

* EnC: Report diagnostics for unexpected recoverable exceptions.

* Tweak NFW reporting

* Account for workspace changes in ActiveStatementTagger

* Unsubscribe event in dispose

* Fix initialization of non-remappable regions for unchanged AS in updated method

* Keep non-remappable regions from previous edit session if no edits were made.

* Update xlfs

* Avoid double-free on cancellation

* Avoid calling DkmWorkList.Cancel for now

* Handle active statement without location

EnC reports compile error when replacing expression body with normal method and small changes (#22624)

* Add errors for ref-readonly signatures, readonly structs, and ref structs

* EE now working with ref-readonly

* Fix failing tests

* PR Comments