Disallow "out discard" in expression trees.

Allow expression variables in lambdas within constructor and field initializers.

Improve error recovery around lambdas in MemberSemnticModel.GetEnclosingBinderInternal

Fixes #17138.

Fixes #16935.

Fixes #16919.

Update the VisualStudioInstanceFactory to close the _currentlyRunningInstance before setting it to null.

Update the VisualStudioInstanceFactory to close the _currentlyRunningInstance before setting it to null.

Merge master into dev15.1.x

Fix parameter syntax

Fixes #14146

Allow specification of a test search directory

Ensure package is loaded by loading CPS project

Capture better dumps for DevDiv #363724

Duplicate some existing scoping tests for pattern declarations in declarator arguments, where they are not permitted. (#16804)

* Duplicate some existing scoping tests for pattern declarations in declarator arguments, where they are not permitted.
Fixes #13660

Remove space preventing editorconfig settings from applying to vb files

Downgrade SyntaxVisualizerExtension dependencies

Bump the NuGet moniker to -rc5

We've shipped -rc4 packages to nuget.org, so any future builds should
be versioned higher.

Capture better dumps for https://devdiv.visualstudio.com/DevDiv/_workitems?id=363724&fullScreen=true&_a=edit

Very infrequently, ImplementsClauseCompletionProvider is asked to provide symbols with a null context. It's not clear why this would happen. Add a FatalError.Report if we try to call any provider with a null context.

Merging on behalf of @DanMcNultyDev

Add test coverage for Out Vars in global code in remaining executable statements.

Added test to verify intellisense on Enumerable.Join parameter types

Closes #14113.

More pattern matching scope tests

Prevent error on Analyzer project creation

this change prevents an error on RC.3

Add test binding redirect for System.Xml.XmlDocument

changed all caller to call JsonRpc.StartListener once all states are set