This can be used to determine if a reference-assembly hit in Elfie is actually
valid for the project it is found in.

This service provdies the facilities for searching for potential nuget packages
that will resolve code issues.

This interface is used to provide facilities for querying Nuget information
on any thread.  The normal nuget apis are thread affinitized and that's
problematic for the code actions we want running on the background.

Logical sorting thinks of '10' as greater than '2' even though
it starts with '1' and normally '1' is less than '2'.

This is necessary so that the light-bulb will dismiss with long running
suggested actions.  Otherwise, it will stick on the screen for the duration
of 'Invoke()'.

Note: integration tests already do a 'wait' after invoking to make sure
the light bulbs have finished.  So they are unaffected by this.

Provide a service to resolve an assembly name in a project context to an actual dll path.

Provide a way for code actions to supress diagnostics in their previews.

Provide a way for 'code action' tests to pass data to their CodeFixProvider constructor.

Add support for merging preview items across multiple operations.

Allow compiler to write to output files if they were open with FileShare.Delete

Avoid mapping text in diagnostics from XML doc comment compiler

Fix version definition of Microsoft.DiaSymReader.PortablePdb and set the version to 1.0.0-rc

Use common output directory for Samples.

[Ask Mode] Fix IOperation crash caused by passing null for ConstantValue when creating Lite…

Ask Mode request: Prevent DeriveArgument from throwing ArrayIndexOutOfRangeException when presented with semantically malformed bound trees.

Disable DocCommentTest Include_Cycle_WRN_XMLDocInvalidXMLFragment

This time it is caused by BontrolVariable bounf to BoundBadExpression.
Also improved the robustness in the Condition property.

EnC: Fix handling ByRef parameters in anonymous delegates

Fix reset interactive build cancellation

Do not offer to create p2p references if the project system will not allow those references.

Prevent DeriveArgument from throwing ArrayIndexOutOfRangeException when presented with semantically malformed bound trees.

Fix an issue in the test caching layer

Update doc comment tests that contain XML comments with paths

The test caching layer had two bugs around re-hydrating the test resutls from cache:

- Made a bad assumption about the name of the file.
- Assumed tests were always rehydrated into the original directory.

closes #8860

Cancel the signature help if the user navigates before it has been presented