* Remove the `*-Counter` cmdlets in `Microsoft.PowerShell.Diagnostics` due to the use of unsupported APIs until a better solution is found. (#4303)

* Remove the `Microsoft.PowerShell.LocalAccounts` due to the use of unsupported APIs until a better solution is found. (#4302)

* Fix the issue where PowerShell Core wasn't working on Windows 7 or Windows Server 2008 R2/2012 (non-R2). (#4463)

* `ValidateSetAttribute` enhancement: support set values to be dynamically generated from a custom `ValidateSetValueGenerator`. (#3784) (Thanks to @iSazonov!)

* Disable breaking into debugger on Ctrl+Break when running non-interactively. (#4283) (Thanks to @mwrock!)

* Give error instead of crashing if WSMan client library is not available. (#4387)

* Allow passing `$true`/`$false` as a parameter to scripts using `powershell.exe -File`. (#4178)

* Enable `DataRow`/`DataRowView` adapters in PowerShell Core to fix an issue with `DataTable` usage. (#4258)

* Fix an issue where PowerShell class static methods were being shared across `Runspace`s/`SessionState`s. (#4209)

* Fix array expression to not return null or throw error. (#4296)

* Fixes a CIM deserialization bug where corrupted CIM classes were instantiating non-CIM types. (#4234)

* Improve error message when `HelpMessage` property of `ParameterAttribute` is set to empty string. (#4334)

* Make `ShellExecuteEx` run in a STA thread. (#4362)

* Add `-SkipHeaderValidation` switch to `Invoke-WebRequest` and `Invoke-RestMethod` to support adding headers without validating the header value. (#4085)

* Add support for `Invoke-Item -Path <folder>`. (#4262)

* Fix `ConvertTo-Html` output when using a single column header. (#4276)

* Fix output of `Length` for `FileInfo` when using `Format-List`. (#4437)

* Fix an issue in implicit remoting where restricted sessions couldn't use `Get-FormatData –PowerShellVersion`. (#4222)

* Fix an issue where `Register-PSSessionConfiguration` fails if `SessionConfig` folder doesn't exist. (#4271)

* Create script to install latest PowerShell from Microsoft package repositories (or Homebrew) on non-Windows platforms. (#3608) (Thanks to @DarwinJS!)

* Enable MSI upgrades rather than a side-by-side install. (#4259)

* Add a checkbox to open PowerShell after the Windows MSI installer has finished. (#4203) (Thanks to @bergmeister!)

* Add Amazon Linux compatibility to `install-powershell.sh`. (#4360) (Thanks to @DarwinJS!)

* Add ability to package PowerShell Core as a NuGet package. (#4363)

* Add build check for MFC for Visual C++ during Windows builds.

This fixes a long-standing (and very frustrating!) issue with missing build dependencies! (#4185) (Thanks to @KirkMunro!)

* Move building Windows PSRP binary out of `Start-PSBuild`.

Now `Start-PSBuild` doesn't build PSRP binary on windows. Instead, we consume the PSRP binary from a NuGet package. (#4335)

* Add tests for built-in type accelerators. (#4230) (Thanks to @dchristian3188!)

* Increase code coverage of `Get-ChildItem` on file system. (#4342) (Thanks to @jeffbi!)

* Increase test coverage for `Rename-Item` and `Move-Item`. (#4329) (Thanks to @jeffbi!)

* Add test coverage for Registry provider. (#4354) (Thanks to @jeffbi!)

* Fix warnings and errors thrown by PSScriptAnalyzer. (#4261) (Thanks to @bergmeister!)

* Fix regressions that cause implicit remoting tests to fail. (#4326)

* Disable legacy UTC and SQM Windows telemetry by enclosing the code in '#if LEGACYTELEMETRY'. (#4190)

PowerShell 6.0 will be exclusively built on top of CoreCLR,

so we are removing a large amount of code that's built only for FullCLR.

To read more about this, check out [this blog post](https://blogs.msdn.microsoft.com/powershell/2017/07/14/powershell-6-0-roadmap-coreclr-backwards-compatibility-and-more/).