* Attempt to fix linux build

* Clean up

Explicitly mention that the optional components are found in the VS Installer, not somewhere on the downloads page (since that's what was linked just before)

* Fixed error message to be more direct.

* update xlf

* Replacing short-lived options with ValueOption

* Remove couple of allocations

* Remove couple of allocations

* Thanks to Don Syme, we have a fix

* Added test

* Do not use length if we can pattern match

* Check field count only once

* Remove second internal ValueOption

* Update FSharp.Core in FCS

* Cleanup

* Remove old TryGetValue

* Reduce use of TryFind

* Reduce allocations in TcPatBindingName

* Reduce some allocations in NameResolution

* Reduce some allocations in TypeChecker

* Use latest FSharp.Core in FCS

* Update FSharp.Core in FCS

* We only need to check for mangledGenericTypeNameSym once

* ShortCut name checking

* Reduce number of LastIndexOf calls

* Reduce number of LastIndexOf calls

* Reduce number of LastIndexOf calls

* Incorporate feedback

* Use PrettyNaming.DemangleGenericTypeName instead of ungenericizeTypeName

* Remove couple of double checks

* Update illib.fs

* Ensure that compiler path is set during Design Time build

* both build types

* Started language service refactoring

* Updated editor fsproj

* Fixed service, should work

* Only compute suppressedMethNames if really needed

* Use HashSet for addersAndRemovers

* Only compute suppressedMethNames if really needed

* move it to the right, sigh

* Move the name check up

* Cleanup propinfio filter

* Move the name check up

* Do not created nested twice

* Do not created nested twice

* cleanup

* LAddrOf is a constant

* fix mistake

* update baseline

* update perf

* remove extra copy when match on byref to struct

* update baseline

* fix merge

* fix build

* Use HashSet to detect FakeContainerModules

* Reduce number of ilTyconNames calculations

* Reduce number of ilTyconNames calculations

* inline notFakeContainerModule

* Avoid intermediate lists

* Create helper functions

* Changing project name from FSharp.Compiler.Unittests to FSharp.Compiler.UnitTests to fix project loading error in FSharp.sln.

* Fixing project file and solution file to get all projects to load in VisualFSharp and FSharp solutions.

* Fixing naming in a few more places.

* One more

* Renaming one more file.

* combine boolean logic

* generalize and ensure no code duplication

* fix tests

* update baselines

* fix baseline

* Update Optimizer.fs

* update baselines

* Fix codegen for StructValueTuple when aliased

* Simplify

* Add regression test for codegen

* Do we really need to keep resolving after we already found a type?

* Do we really need to keep resolving after we already found a type?

* simplify check

* minimize use of state machine variables

* fix bug

* update baselines

* baseline updates

* Do not use new empty string just to throw it away immediately

* Do not use new empty string just to throw it away immediately

* No need to optimize closures for empty strings

* remove emptyIfNull