Can not add nuget package to PCL project

[slimjack]

Hi,
I tried Zeroconf with usual Windows Forms project, and it works perfectly. Thank you for your work.

Now I'm trying to add Zeroconf to my PCL library (v4.5, Profile111). The first problem I run into was the same as described here (System.Runtime.InteropServices.RuntimeInformation installation failed)

I've applied project.json to my PCL libary (guide) and now instalation of Zeroconf is OK but buid is failed with

'C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets'
(1820,5): warning MSB3274: The primary reference "...\.nuget\packages\Zeroconf\2.8.0\lib\netstandard1.0\Zeroconf.dll" could not be resolved because it was built against the ".NETPortable,Version=v5.0" framework. This is a higher version than the currently targeted framework ".NETPortable,Version=v4.5,Profile=Profile111".

project.json:

{
  "dependencies": {
    "Zeroconf": "2.8.0"
  },
  "frameworks": {
    ".NETPortable,Version=v4.5,Profile=Profile111": {}
  },
  "supports": {}
}

Please, help me to add Zeroconf to my project.

[clairernovotny]

Unfortunately, it looks like you're hitting a different bug now :(
dotnet/roslyn#11067

I would recommend switching to a netstandard-based profile and this issue will go away. Is there any particular reason to target Profile 111 instead of netstandard1.1?

[slimjack]

I've converted all projects in my Xamarin solution to netstandard1.1 (I used your guide) and now all works OK.

Thank you!

[cjrd]

@slimjack I'm running into similar issues: can you share your project.json you used to make this work?

Thanks!

[slimjack]

Here is a project.json of the library that references Zeroconf:

{
  "supports": {},
    "dependencies": {
        "NETStandard.Library": "1.6.0",
        "Zeroconf": "2.8.0"
    },
  "frameworks": {
    "netstandard1.3": {}
  }
}

.csproj file:

...
  <PropertyGroup>
...
    <TargetFrameworkVersion>v5.0</TargetFrameworkVersion>
    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
...
  </PropertyGroup>
...

Xamarin common project project.json:

{
  "dependencies": {
    "NETStandard.Library": "1.6.0",
    "Xamarin.Forms": "2.3.2.118-pre1"
  },
  "frameworks": {
    "netstandard1.3": {
      "imports": "portable-net45+win8+wpa81+wp8"
    }
  },
  "supports": {}
}

Droid project.json:

{
    "dependencies": {
    },
    "frameworks": {
        "MonoAndroid,Version=v6.0": {
        }
    },
    "runtimes": {
        "win": {}
    }
}

Droid .csproj:

...
  <PropertyGroup>
...
    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
    <TargetFrameworkVersion>v6.0</TargetFrameworkVersion>
    <CopyNuGetImplementations>true</CopyNuGetImplementations>
...
  </PropertyGroup>
...

Look this example of Xamarin projects based on project.json.