Add a feature that offers to add missing accessibility modifiers.

Merge dev15.3.x to master

Show builder for async lambda

Fixes #18985

Fixes https://github.com/dotnet/roslyn/issues/20937

Add a workaround for P2P references with reference assemblies

Report progress as we update the package index.

Merge dev15.3.x to master

Remove dead code from GenerateConstructor.

# Conflicts:
#	build/Targets/Imports.targets
#	src/EditorFeatures/Core/EditorFeatures.csproj

Initialize snippets after solution load is complete

Show modifier/method/type block declaration keywords after attribute …

Disable NETCore version check

Fixed smart variable naming

Works around https://github.com/dotnet/roslyn/issues/20945

Disable NETCore version check

Diagnostic analyzer to identify out of range placeholders in a format string.

Works around https://github.com/dotnet/roslyn/issues/20945

Fixes https://github.com/dotnet/roslyn/issues/20837

Wait for encapsulate field to complete

Check for prefix match before hard selecting when backspacing

Add an analyzer that offers to convert from a lambda to a local function.

* Improve type argument list parsing in error conditions.

* Fix type.

* Remove unused method.

* Improve generic parsing in a couple of additional cases.

* Share more code.

* Inline method.

* Fix logic.

* Add tests.

* Restore test class.

* REmove case, and add test.