re-filter signature help providers if the file's content type has changed

Cleaning up unused msbuild imports that was causing MSBuildWorkspace to fail

Add support for TypedConstant and TypeOf expressions

Remove use of ClearTrivia on SyntaxGenerator inputs

Re-enable the ResultProvider tests

Formatting Service should honor Smart Indent Option

...now that the CI machines have been updated.

Fixes #1178

Fix #2224 : Formatting Service should not format the whitespaces before
Braces if Smart Indentation Option is set to None

Cleaning up an unused msbuild import that was causing MSBuildWorkspace to fail. We don't have a Nuget.targets anymore

Options pages

Hide some confusing options and remove confusing words.

Use Microsoft.DiaSymReader.Native to make PDB id and stamp deterministic

Display a tooltip for hyperlinks in error list and preview pane

Display a tooltip containing url destination for hyperlinks in the error list and light bulb preview pane UIs.

Also use full fidelity (i.e. substituted)  error message in the search query in the case of hyperlinks that redirect to bing search so that we can present more relevant search results.

Fix an incorrect tautological if condition

Replace CreateStreamOnHGlobal with a custom COM Memory Stream

Fix internal bug 1138938: Keyword highlighting is unnoticeable in dark theme

The issue was that keyword highlighting was using brace highlighting tag
instead of reference highlighting tag (my guess is because brace
highlighting and keyword highlighting were written before reference
highlighting).

This change uses the reference highlighting tag. I also renamed the
keyword lighting folder structure to be called KeywordHighlighting
instead of just Highlighting.

Correctly handle simplification of Nullable{T} to T? inside crefs 

Fixes #29

Fix NullReferenceException in EE

I made a struct into a class (in 0d415c29) but I missed a null check
around an existing member access.

Emit anonymous delegates, used for dynamic, in deterministic order

Dont generate Getter/Setter when Writeonly/Readonly for VB Properties

Use a custom IStream implementation rather than the native CreateStreamOnHGlobal

Change named pipe ownership check

Update Edit and Continue analyzers to use resource strings

Fix #1853 update UnitTests to use resource strings
Fix #1338 update EnC analyzers to use resource strings

- Shared the same strings in FeaturesResources
- Added "Locked" annotation not to be localized

The goal is to have a single csc.exe / vbc.exe binary that runs cross
plat and cross runtime (mono, desktop, coreclr).  Yet there are certain
features which only light up in a subset of the scenarios.  For example
the compiler server only lights up on Windows platforms.

This is fine but forces us to jump through hoops when doing platform
specific actions like checking the owner of the other end of the named
pipe.  To compile this code into a portable assembly we either need to
a) pinvoke or b) use reflection.  In this case reflection was the
simpler route.

Make Formatter.GetFormattedTextChanges public

Expose overloads of Formatter.GetFormattedTextChanges that correspond to
the overloads of Formatter.Format.

Reduce both methods to a single internal implementation and remove
optional parameters from them.

Use SpecializedCollections.SingletonEnumerable when calling Format and
GetFormattedTextChanges.

Fixes #778.