Fixes #23351.

Correcting a possible copy and paste error, should be `FULLWIDTH_LATIN_SMALL_LETTER_B`.

Extended integer prefix tests to cover full range of permitted characters.

Fixes #12214

This reverts commit ce4496ab.

Fixes #23282.

* VB EE: Properly handle syntax errors in synthesized assignments

* Fix test

when OOP is killed by users, default(DesignerAttributeResult) is returned. it was okay when it was class, but not it being struct, it cause issue because NotApplicable return false rather than true in error case.

so, change NotApplicable to Applicable so that it can handle the error case better.

* made NFW to use runtime callstack rather than callstack from fake exception

also, made WatsonReporter from VS and ServiceHub to share more implementation

* PR feedback.

rather than using null exception which is taken cared by NFW, we explicitly throw exception to have callstack so that it can show up in perfview as well.

* centralize who throws exception if given exception is never thrown.

also, explicitly add runtime callstack in one of reserved slot to make NFW bucketting better.

* fixed tests and added empty callstack test

Use synthesized attribute infrastructure for System.NullableAttribute

Misc.

Misc.

Misc.

Misc.

Misc.

Misc.

PR feedback

Override in PEMethodSymbol

Fixes #22619

* Marshalling methods with `in` parameters should have [In] attribute

* Apply [In] on all `in` parameters

* More tests

* nit

Also skip another test that failed while skipping the original test