Remove obsolete code.

Add dedicated tests for type argument inference from out variable declarations.

Small rename to help unblock https://github.com/dotnet/roslyn/pull/14577

Remove uncalled method.

fixed 2 issue where IDE analyzer throws null exception and host analy…

The code is related to the feature of supporting explicit parameter-less constructors in structures, which was removed. Also, the code in IsDefaultValueTypeConstructor helper wasn't properly handling constructed or retargeted symbols.

Fixes #14541.

Skip flaky SolutionTests.TestRecoverableSyntaxTreeVisualBasic until …

fixed 2 issue where IDE analyzer throws null exception and host analyzer exception message not going away from error list issue.

implements IProjectCacheHostService in OOP.

workspace will cache everything in memory if this service doesn't exist in workspace. now this being exist, workspace will start to put things such as text, tree, compilation either kick out from memory or save it to temporary storage.

this should reduce memory foot print once things become idle, but this doesn't help memory footprint while feature is running.

with this service, once OOP become idle, memory foot print goes down to about 700MB to 1 GB. but still while code lens run, memory goes up to 3GB.

Merge dev15-rc into master

Use operand.Display property when printing method group types to diagnostics

Only format an open curly if it the first token on a line.

Group spell checking fixes together so we can collapse them if we have a lot of fixes offered.

Fix issue with chained calls in Replace-Method-With-Property.

Serialize out all code style options.

Add default Dev15 location

Merge pull request #14594 from heejaechang/dllloading

Add filters for keywords and snippets.

Don't dismiss intellisense if the user types a number after a dot.