This change moves powershell to .NET Core 2.0. Major changes are: PowerShell assemblies are now targeting netcoreapp2.0. We are using microsoft.netcore.app-2.0.0-preview1-001913-00, which is from dotnet-core build 4/4/17. We cannot target netstandard2.0 because the packages System.Reflection.Emit and System.Reflection.Emit.Lightweight, which are needed for powershell class, cannot be referenced wh