Add System.Runtime.InteropServices.RuntimeInformation to common nuget…

Merge dev15-rc2 into master

Adds Prerequisites to vsixmanifest templates

Adjust scope of variables declared within a ‘for’ condition and ‘for’ incrementors.

Don't manually construct strings.  It doesn't work for localization.

Variables declared within a ‘for’ condition are in scope only inside the condition, incrementors and body of the loop.
Variables declared within ‘for’ incrementors are in scope only inside the incrementors.

Related to #15630.

Remove call to SetProgress for performance reasons.

add missing codebase to VS for System.Xml.ReaderWriter.dll

Don't search for files looking for a predefined type when the type we're looking at is not predefined itself.

Wires up local functions through the semantic model and the SymbolId
service so the description is available to the editor.

Fixes #14163

Updating the Workspaces.Common nuspec to explicitly partition the des…

When local functions are declared in unsafe regions (unsafe statement,
unsafe member, unsafe type), their bodies should be considered unsafe
regions, even if unsafe is not a declaration modifier on the local
function.

Fixes #13172

Updating the Workspaces.Common nuspec to explicitly partition the desktop vs netstandard dependencies.

Combine deconstruction assignment and declaration, and support discards (merging to master)

Don't search for files looking for a predefined type when the type we're looking at is not predefined itself.

Update Roslyn dependencies to CoreFX 1.1 packages, specifically System.Reflection.Metadata 1.4.1

Manage diagnostics from open files only analyzers better

Analyzer install script fixes

Improve added reference encoding in project file.

Updating the BuildNumber to be 00065535.0 if no BuildNumber was specied.

Don't instrument methods marked with ExcludeFromCodeCoverageAttribute

Don't search for files looking for a predefined type when the type we're looking at is not predefined itself.

* Combine deconstruction assignment and declaration, and support discards.

- Combine deconstruction assignment and declaration, and support discards.
- Add wildcards.work.md to track outstanding work.
- Bind each type syntax once in a deconstruction.
- Because tuples may contain declarations, adjust lambda disambiguation
  and adjust parsing of argument lists.
- Diagnose tuple element names on the left of a deconstruction.
- Add relational operators to disambiguating tokens in 7.5.4.2

* Disallow deconstruction declarations except at the statement level.
This is now a semantic restriction (until we decide to remove it).

* Revise logic to detect `var` in a declaration expression.
Plus other changes per code review.

* Add a test that GetTypeInfo on a discard expression doesn't crash.
* Small changes per code review.
* Add (skipped) test for var invocation in parens.
* Rename "Discarded" to "Discard"
* Changes recommended via code review.
* Minor changes to the handling of declaration expressions per code review.
* Addressing blocking feedback while Neal is OOF

Fixes https://github.com/dotnet/roslyn/issues/14794
Fixes https://github.com/dotnet/roslyn/issues/14832

Variable declared within a while’ condition should be in scope only within the loop.

remove unused string

Add a version header to Object-Streams.  

Fixes #15780