* Read/store ILCustomAttrs, ILSecurityDecls, ILTypeDef sensibly (#4597)

* hide representation of ILPreTypeDef

* fix build

* remove unnecessary use of lists with repeated tail-appends

* add comment

* fix test

* improve tokenizer memory performance

* add comments

* use Memory Cache with sliding window for tokeniztion information

* use MemoryCache

* weak ByteFile

* cleanup, only use in VS

* cleanup flags

* some comments

* some comments

* use Roslyn memory manager for metadata in VS

* report statistics only with --times, clarify flags2

* minor updates

* us in VS

* fix build

* fix build

* fix build

* add SFH to FileSystem

* fix build

* fix build

* fix build

* fix build

* add some comments

Hide record representations in Abstract IL

* extract PatternMatcher to separate project

* add project reference

* fixes for VisualFSharp.sln usage

* fixes for VisualFSharp.sln usage

* Update FSharpEmbedResourceText.fs

* move MockTypeProviders

* rename vsintegration/tests/unittests --> vsintegration/VisualFSharp.UnitTests

* rename again

* fix paths

* forward warnings when searching for a method overload, fixes #3752

* add a new test for the bug

* simplify test by using a `typecheck/sigs` tests

* Update according to test

* update test

Improve perf of unused opens analysis

fix building in VS with PDB conversions

* Revert "remove comment (#4538)"

This reverts commit 4dce3d16.

* Revert "Code Lens and Line Lens (#3608)"

This reverts commit 8f8cbd64.

* Use C# code instead of manually modified DLL.

* set  /langversion:latest

* pre-fill CSC_PIPE with Microsoft.Net.Compilers

* upgrade Microsoft.Net.Compilers 2.4 => 2.7

* Found a workaround for the heavy code lens bug.

Merged master into the branch.
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Fixes a deadlock due to context changes + started removing mutex. This is from yesterday!
Review is NOT applied yet!
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Small fixes, applied a part of the reviews
The UI is still buggy. This is very annoying.

@saul I should report the bug you read about in my comments. . .
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Fixed CodeLens layout updates.

Added possibility to enforce a re-layout of the visible code lens for the next layout-changed call.

Applied suggestions from the reviews (could be that I missed one or two).

Small cleanup.

Small documentation additions.

More checks.

Removed some debug code.

Added some debug code, most only appears if exceptions are thrown.

The caching is still a small bit broken. At least I found out it's only a bit broken.
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Fixing removal of Code Lens.

Reuse of elements still needs to be finished. I started it months ago but didn't finish it.
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Fixing fatal UI logic.

Finally activated code for using cache results (so fixed a bug which included that code lens could be lost for us).

Small cleanup to reduce confusion and decreased chance of introducing bugs due to this.

Changing TaggerProvider to a more appropriate one.

Discovered bugs in the visitor logic.

* Added Line-Lens
Added Options page to disable Code-Lens and to switch between Code-Lens and Line-Lens

More caching fixes. Minimal UI fixes
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Fixed caching completely.
Also fixed with this UI issues.

Big cleanup.

Now it's ready for another round of reviews!
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Added prefix option
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Fixing bug reported by Vasily

Fixing cache bug.

Fixing ui-offset bug.

Fixing multi-view bug.

Fixing build.

Fixing signature bug reported by @saul
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Fixing KeyNotFoundException.
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Another UI fix.
Code Lens are now hidden as soon as their line isn't visible anymore due to inserting new lines.
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Applied some review comments.

Heavy performance improvements, now layouting isn't done every time due to that Visual Studio just transforms everything together (it's not viewport relative anymore, it's owner controlled but still in the wpf-text-view-coordinate-system)!

The UI should now be fine in my opinion. It wasn't able for me to find a better workaround as just subtracting one pixel from the top position of the adornments.
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Another round of small cleanup.
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Another UI layout fix.
Now weird code lens anymore :P
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Fixing merge

* start working on color option

* use darker gray à la normal CodeLens

* Bind only from XAML. Fixes issue where "prefix" option was not saved

* Undo unintended whitespace change

* Should be part of previous commit

* start working on color option

* use darker gray à la normal CodeLens

* Undo unintended whitespace change

* Should be part of previous commit

* fix value names

* Applied review + small workaround for a bug.

Merry Christmas!
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* Removed old files

* trying to fix CI
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

* First fix for member and constructor signatures!
Signed-off-by: Nrealvictorprm <mueller.vpr@gmail.com>

build portable PDBs from SDK projects and convert to Windows PDBs after build

* add entity_compiled_name, entity_other_range to EntityOptionalData

* add entity_kind to EntityOptionalData

* add entity_xmldoc, entity_xmldocsig to EntityOptionalData

* add entity_tycon_abbrev to EntityOptionalData

* add entity_tycon_repr_accessibility, entity_accessiblity to  EntityOptionalData

* add entity_exn_info to EntityOptionalData

* remove XmlDocSif from TastPickle

* fix unit check

* add namespace check for unit

* Enable net sdk project properties to be set in assembly info

* Add back removed file

* correct version

* typo