This ensures that if the file is still locked when we receive an event,
we won't hit an IO error and fail to read it at all. This is the same
behavior we did with the older project system interface.

This has the same hole that we have with source files right now: we
no longer have the logic which will catch modifications between the
moment we start listening and when we actually get the watcher in place.
Further work will close this hole taking advantage of some perf benefits
from the newer file watching APIs.

There's going to be multiple contexts in here, so we should clarify
which one.

This was identical to the (public!) CreatePortableExecutableReference,
so we don't need two.

This code is dead. It was also terribly confusing; everybody always
expected that VisualStudioMetadataReference inherited from
PortableExecutableReference, but it didn't. The nested .Snapshot type
did.

VisualStudioMetadataReference (the type) still exists as a parent
class of VisualStudioMetadataReference, even though there's nothing
actually in the type now. We can fix that up in a later commit
since that'll be fairly messy.

Merge features/razor-far to 16.0 Preview 1 ( i cann't figure out how to rekick license/cla ) 

Merge pull request #31125 from jasonmalinowski/fix-metadata-reference-conversion-to-languages-without-compilations

Block conversion of references to F# projects from C# projects

This was a policy we previously had in place, but I accidentally deleted
the tests covering it in 2d86a7b6.

Added a way to inject dynamic file to workspace for component like ra…

Add dynamic file support and hook it up to the project system

Add some additional shims to VisualStudioProjectTracker

Define IContentControlService for tool tips in EditorFeatures.Wpf

Handle errors in Inline Rename

Add a static classification tagger for previews

Move DisposableToolTip

Code style cleanup

Extract DocumentSpanExtensions to its own file

Merge pull request #31049 from jasonmalinowski/fix-project-reference-conversion-during-project-unload

Make sure we convert project references back on project removal

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