Design-time facades shouldn't be added to the nuspec for Full .NET

[bricelam]

{
  "dependencies": {
    "System.Collections.Immutable": "1.1.36"
  },
  "frameworks": {
    "net45": {
      "dependencies": {
        "System.Collections": "4.0.0.0"
      }
    }
  }
}

The reference to System.Collections is required to build on DNX, but if you try to install the resulting nupkg into a net45 project, you'll get the following error.

Multiple assemblies with equivalent identity have been imported: 'C:\windows\Microsoft.Net\assembly\GAC_MSIL\System.Collections\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Collections.dll' and 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5\Facades\System.Collections.dll'. Remove one of the duplicate references.

The workaround is to declare it as a built-time dependency.

{
  "System.Collections": { "version": "4.0.0.0", "type": "build" }
}

[herecydev]

May be related to what I raised just hours ago.

[Eilon]

Hmm but is this actually correct? Isn't the reference needed? Is the package itself just broken?

[davidfowl]

The unfortunate thing about this is that the msbuild based projects fail instead of noop. I would love to get that fixed instead of mimicking that behavior in the dnx

[jonesopolis]

thanks for the fix brice. Was killing me.

[muratg]

This issue was moved to dotnet/cli#578