Merge pull request dotnet#819 from dotnet/bump-to-411

Bump to 411

remove preview tag

Merge pull request dotnet#800 from dotnet/remove-old-files

remove old files

ver 3.2

Fix code coverage

Merge pull request dotnet#734 from dotnet/ix-refs

Ix Reference Assemblies

Copy .editorconfig from dotnet/corefx repo (dotnet#584)

* Copy .editorconfig from https://github.com/dotnet/corefx/blob/master/.editorconfig, delete the overriding .editorconfig in Rx.NET.

* Deviations for this repo.

* Use pascal case for static fields, without s_ prefix.

* Omit default accessibility modifiers.

* Prefer inferred names.

* Add indent_size = 2 for yaml files.

remove prerelease

rename var