- change `CultureUtilTest` to use `Thread.CurrentThread`
- when hosted in latest MSBuild, changing `thread.CurrentThread` changes `Thread.CurrentThread` instead
- find current Microsoft.Build.Tasks assembly in WebStack.tasks.targets, not just the WebApiHelpPage project
- add `$(TestInParallel)`
- allows user to e.g. build in parallel but test assemblies serially
- default remains doing everything in parallel
- change build.cmd to set %ErrorLevel% when exiting
- add empty top-level Directory.Build.* files
Use only VS 2017 or later
- ensure same MSBuild features are available in command-line and VS builds
- move `$(MinimumVisualStudioVersion)` project settings to global location and bump required version up
Use Microsoft.NET.Sdk and `<PackageReference/>`s in .NET Standard project
- create a "real" .NET Standard 1.1 assembly, not .NET Portable v5.0
Move to latest version of the xUnit MSBuild runner
- v2.3.0 has a few bugs related to XML results files e.g. xunit/xunit#1515
- switch to current XML results format (required with v2.3.0 but doesn't hurt with later versions)
- make runner discovery version-independent
- add support for `msbuild /t:test` in test project directories
Doug Bunting