Aspnetcore: Failed to add reference to 'System.Runtime'. Please make sure that it is in the Global Assembly Cache.

[RehanSaeed]

Not sure where to post this...

I have the following project.json using several frameworks from .NET 4, all the way up to 4.6.1 and also Serilog is added as a global dependency, while all the frameworks except .NET 4 also have Serilog.Sinks.EventLog as an additional dependency. If I remove the System.Runtime references I get 37 of these errors:

Severity Code Description Project File Line Suppression State
Error CS0012 The type 'Exception' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. Bridge.Logging..NET Framework 4.5, Bridge.Logging..NET Framework 4.5.1, Bridge.Logging..NET Framework 4.5.2, Bridge.Logging..NET Framework 4.6 C:\Bitbucket\Bridge.Logging\Source\Bridge.Logging\LogEventEnrichers\ExceptionEnricher.cs 52 Active

If I publish my NuGet package and then try to install it, I get the following error:

Failed to add reference to 'System.Runtime'. Please make sure that it is in the Global Assembly Cache.

Why am I being forced to add System.Runtime and what does this achieve?

My project.json

{
  ...

  "dependencies": {
    "Serilog": "1.5.14"
  },

  "frameworks": {
    "net40": {
      "frameworkAssemblies": {
        "System": "",
        "System.Core": "",
        "System.Data": "",
        "System.Runtime": ""
      }
    },
    "net45": {
      "dependencies": {
        "Serilog.Sinks.EventLog": "1.5.11"
      },
      "frameworkAssemblies": {
        "System": "",
        "System.Core": "",
        "System.Data": "",
        "System.Runtime": ""
      }
    },
    "net451": {
      "dependencies": {
        "Serilog.Sinks.EventLog": "1.5.11"
      },
      "frameworkAssemblies": {
        "System": "",
        "System.Core": "",
        "System.Data": "",
        "System.Runtime": ""
      }
    },
    "net452": {
      "dependencies": {
        "Serilog.Sinks.EventLog": "1.5.11"
      },
      "frameworkAssemblies": {
        "System": "",
        "System.Core": "",
        "System.Data": "",
        "System.Runtime": ""
      }
    },
    "net46": {
      "dependencies": {
        "Serilog.Sinks.EventLog": "1.5.11"
      },
      "frameworkAssemblies": {
        "System": "",
        "System.Core": "",
        "System.Data": "",
        "System.Runtime": ""
      }
    },
    "net461": {
      "dependencies": {
        "Serilog.Sinks.EventLog": "1.5.11"
      },
      "frameworkAssemblies": {
        "System": "",
        "System.Core": "",
        "System.Data": "",
        "System.Runtime": ""
      }
    }
  }
}

[RehanSaeed]

The solution was to make System.Runtime a build time dependency like so:

// Old
"System.Runtime": ""

// New
"System.Runtime": {
  "type": "build",
  "version": ""
}

I'm not entirely sure what this means so any helpful comments would be much appreciated.

[gmarz]

We've also just hit this, see https://github.com/elastic/elasticsearch-net/issues/1774

Setting "type": "build" as @RehanSaeed mentioned above does seem to do the trick, but I have no idea what the implications are. Is there any documentation on this?

[RichiCoder1]

Also just ran intom this. Same concern as gmarz.

[aspnet-hello]

This issue is being closed because it has not been updated in 3 months.

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