fixed DebugType ArgumentNullException in CommandLineArgumentReader

* Move ILAsm publishing to ILAsmDeploy project

* BuildBoss: recognize ReferenceOutputAssembly attribute

* Add GlobalPropertiesToRemove

Merge dev16.0.x to master

Merge dev16.0.x to master

Do not try to convert interpolated string format specifiers into virtual chars

Fix generate field doesn't recognize accessibility modifier configuration

Fix to return attributes of VB.NET enum members when using the code model EnvDTE.CodeVariable.Attributes

Enable C# CommandLine and WinRT tests on Linux

* Updated ChangeSignature dialog to show VB code, when language is Visual Basic.
Updated to more modern style of usage.

* Unify the local functions.
Move local function to after last return of block.

* Add a thread name to the DiagnosticEventTaskScheduler

* Create an explicit thread for DiagnosticEventTaskScheduler

Skip an integration test and an assert that is firing frequently on d…

Merge remote-tracking branch 'dotnet/dev16.0.x' into merges/dev16.0.x-to-master and resolve conflict

Merge remote-tracking branch 'dotnet/master' into merges/dev16.0.x-to-master and resolving conflicts.

Merge dev15.9.x to dev16.0.x

Change analyzer executor to do an intersection with the given span 

Merging features/NullableReferenceTypes to dev16.0.x

For cases where the requested span is (x, x), try using span
intersection rather than contains.

That should cover all the cases for requesting the diagnostics
at caret

Fixes #27703

The command line tests are largely failing on CoreClr due to the
inability to implicitly find the SDK directory. On desktop it's possible
to use the directory containing the object assembly. On CoreClr there is
no real equivalent. Fixed this by just writing out mscorlib to a
directory on disk and making that directory explicitly the SDK
directory.

Enable C# scripting on Mono