Publish and run fail on app with project reference to netstandard2.0 class library

[mikeharder]

In CLI 2.0.0-preview2-006391 or later, dotnet publish -f fails on an app with a project reference to a netstandard2.0 class library.

Repro Steps

1. git clone https://github.com/mikeharder/NetCoreProjectReference
2. cd NetCoreProjectReferece\console_netcoreapp20_net46
3. dotnet restore
4. dotnet publish -f netcoreapp2.0

MSBUILD : error NU1201: Project classlib_netstandard20 is not compatible with net461 (.NETFramework,Version=v4.6.1).
Project classlib_netstandard20 supports: netcoreapp2.0 (.NETCoreApp,Version=v2.0) 
[C:\Git\NetCoreProjectReference\console_netcoreapp20_net461\console_netcoreapp20_net461.csproj]

5. dotnet publish -f net461

C:\Temp\dotnet-sdk-2.0.0-preview2-006391-win-x64\sdk\2.0.0-preview2-006391\Sdks\Microsoft.NET.Sdk\build\
Microsoft.PackageDependencyResolution.targets(164,5): error :
Assets file 'C:\Git\NetCoreProjectReference\classlib_netstandard20\obj\project.assets.json' doesn't have a target
for '.NETStandard,Version=v2.0'. Ensure you have included 'netstandard2.0' in the TargetFrameworks for your project. 
[C:\Git\NetCoreProjectReference\classlib_netstandard20\classlib_netstandard20.csproj]

6. Above publish commands work if the --no-restore parameter is added.

[livarcocc]

We have a proposal to fix this and I will try it out tonight.

The proposal is to not pass forward to implicit restore the -f/--framework parameter.

[mikeharder]

Issue also impacts dotnet run.