copy_local: false has no effect when opening .NET SDK projects with VS2017

[atlemann]

Description

When using the new .NET SDK project format, setting copy_local: false for a package does not work as expected when opening the project in VS2017.

Repro steps

In a new empty directory, create a new F# project

dotnet new classlib -lang f#
dotnet new sln
dotnet sln add *.fsproj

Edit the project file and replace netstandard2.0 with net462

<TargetFramework>net462</TargetFramework>

Invoke

paket init

Edit paket.dependencies (note copy_local: false)

framework: net462
source https://www.nuget.org/api/v2
nuget Argu copy_local: false

Edit paket.references

Argu

Invoke

paket install

Now open the project in VS2017 and build from there.

The problem is that VS2017 generates the project.assets.json when opening the project and that seems to ignore the ExcludeAssets tag.

Expected behavior

Argu.dll not to appear in the bin folder

Actual behavior

Argu.dll does appear in the bin folder

Known workarounds

Delete the obj folder and don't open the solution in VS and build with dotnet build instead.

However, if you open the solution in VS2017 afterwards, the project.assets.json is changed and things are broken again (it fills in the runtime asset).

[atlemann]

Even if I first do dotnet restore and project.assets.json is correct, opening the project in VS2017 overwrites the project.assets.json file and changes the runtime asset. The problem is that I'm i a gigantic C# solution, so VSCode is not an option. Maybe Rider.

[atlemann]

If I add the ExcludeAssets tag in the {projectfilename}.paket.props file inside the obj folder, delete the project.assets.json file and then open the project in VS2017, things work as expected.

<PackageReference Include="Argu">
    <Version>5.1</Version>
    <ExcludeAssets>runtime</ExcludeAssets>
</PackageReference>

[atlemann]

Kind of related: #3186
Seems like settings for a package in paket.references files aren't taken into consideration with New SDK regardless of using dotnet CLI or VS2017.