Updateded to Show Message to run as administrator. 

When run without elevated below message would be shown. Which is clear to run as administrator

.\set-dockernat-networkategory-to-private.ps1 : The script 'set-dockernat-networkategory-to-private.ps1' cannot be run
because it contains a "#requires" statement for running as Administrator. The current Windows PowerShell session is
not running as Administrator. Start Windows PowerShell by  using the Run as Administrator option, and then try running
the script again.
At line:1 char:1
+ .\set-dockernat-networkategory-to-private.ps1
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : PermissionDenied: (set-dockernat-n...-to-private.ps1:String) [], ScriptRequiresException
    + FullyQualifiedErrorId : ScriptRequiresElevation

No need to build the .NET bits when using Docker Multi-Stage build, as we use now.

"Starting with .NET Core 2.0 SDK, dotnet restore runs implicitily when you run dotnet build." (C) https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-build?tabs=netcore2x

"Starting with .NET Core 2.0 SDK, dotnet restore runs implicitily when you run dotnet build." (C) https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-build?tabs=netcore2x

Also some config tweaking on windows

Removing docker-compose.windows.override (not needed as is identical to docker-compose.override)

it's working 2m 24s instead of 3m 48s (sequential execution)
theis only one problem... write-host not working inside the workflow

code adjustements to work with preview-2

Lots of things to address yet, because nuget packages are still on 1.1

Use current branch as tag

Removed old script build for windows.

Removed old script build for windows.