Last  \r in source should not be represented as if there is another line in the source.

Produce only a single compilation event for partial methods.

Convert MSBuild warnings to errors

Fixes #7477

[Ask Mode] Fix crash in `EventAssignmentExpression.EventInstance` in VB

Our build should be warning and error free.  Unfortunately there is no way to enforce this in MSBuild because warnings cannot be promoted to errors.  Given that we're already logging all builds to disk I added a script that looks through the logs and issues an error if any warnings are discovered.

Doing so will cause crashes if such line is obtained and is also a compat break.

Fixes #8200

Which is caused by invalid code.

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

Revert "Revert "Merge pull request #7510 from CyrusNajmabadi/analysisSpeedup""