fixed issue in C# GetBindableSyntaxNode which return bindable node th…

Fix IEventAssignmentExpression

Conversion expression rewrite

* dotnet/features/ioperation:
  Tagging VB/C# Ioperation tests (#21310)

* Tagging VB/C# Ioperation tests

* Fix the Wrong Tagging

* dotnet/features/ioperation: (31 commits)
  Fix lambda EnC (#21291)
  Use 15.3 Preview 7 for VSI CI machines
  Add cancellation between each document.
  Remove unused private method (#21268)
  Work around SDK 1.1 issue around netcoreapp2.0
  Update Language Feature Status.md
  Const warnings shouldn't cause emit error (#20729)
  Fix the symbol test
  Choose test config based on TargetFramework
  Standardize on the portable ThrowingTraceListener
  Enforce using UnitTestPortable
  Correct the order of parameters to Version
  Clean up RunCsc/Vbc.cmd a tiny bit
  Remove usages of 'Foo' from our codebase. (#21224)
  Make RunCsc/Vbc scripts respect DOTNET_HOST_PATH
  Fix typo
  ignoring exceptions about not running on main thread
  Updating VisualStudioSymbolSearchProgressService to consume new API
  Updating visual studio references
  Accept pre-rel version number
  ...

Merge master to features/ioperation

Merge remote-tracking branch 'upstream/master' into merges/master-to-features/ioperation-20170807-070019

* dotnet/features/ioperation:
  fix file path casing for analyzer packate
  Use 15.3 Preview 7 for VSI CI machines

Update integration test machines ioperation

Add feature to add missing File-Banner to a file.

Use 15.3 Preview 7 for VSI CI machines

* dotnet/features/ioperation: (229 commits)
  Adding Ioperation tests for WhileUntilLoopStatement (#21047)
  marked assert that needs to be re-enabled
  addressing more PR feedbacks
  PR feedback
  Remove InvocationReasons enum boxing
  PR feedbacks
  Expose if a Binary/Unary operator was 'Lifted' at the IExpression level. (#14779)
  addressing PR feedback
  added comments
  Update VS Integration machines to 15.3 Preview 6 (#21240)
  fixed typo
  Fixed #18763 Compiler crash on bad code in the IDE (#20903)
  Fix typo in ERR_RefReturnParameter2 (#21235)
  Fix unbound recursion with const var field in script (#21223)
  Typo fix (#20513)
  PR feedbacks and added some more tests
  When producing character literals, surrogate characters should be escaped. (#20720)
  Fix build correctness issues
  Fix possible null reference warnings
  Adding ioperation tests for ForEachStatement (#21048)
  ...

fixed issue in C# GetBindableSyntaxNode which return bindable node that is outside of SemanticModel.Root

Add StrongName to list of language features

Fix where

Work around SDK 1.1 issue around netcoreapp2.0