Can not add reference to .NET Core class library in ASP.NET Core project

Question

I've created a new ASP.NET Core project and a class library for it in VS 2015 (Update 3).

This is how project.json looks like:

    {
      "version": "1.0.0-*",

      "dependencies": {
        "NETStandard.Library": "1.6.0"
      },

      "frameworks": {
        "netstandard1.6": {
          "imports": "dnxcore50"
        }
      }
    }

And this is a project.json of the ASP.NET Project:

{
  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.0.0",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Mvc": "1.0.0",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Configuration.FileExtensions": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.Extensions.Logging": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.Extensions.Logging.Debug": "1.0.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0"
  },

  "tools": {
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
  },

  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6",
        "portable-net45+win8"
      ]
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "runtimeOptions": {
    "configProperties": {
      "System.GC.Server": true
    }
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "Views",
      "Areas/**/Views",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

Now I can't add my class library to my site as 'dependency can't be resolved'.

Nate Barbettini · Accepted Answer · 2016-07-28 16:14:44Z

1

I didn't see a reference to your library in your application's dependencies section. If your library and your application are in the same solution, make sure you use target: project like so:

project.json of ASP.NET Core project:

"dependencies": {
    ...
    "MyLibrary": {
        "version": "1.0.0",
        "target": "project"
    }
}

Otherwise, NuGet will look for your library as a package instead of looking in the solution.

answered Jul 28, 2016 at 16:14

Nate Barbettini

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2 Comments

alexxjk Over a year ago

Thank you @Nate Barbettini, it has been helpful. Now my ASP.NET Core projects builds fine but I'm still having an issue with Resharper. It still doesn't see libraries. By any chance do you know a cure for this?

Nate Barbettini Over a year ago

@alexxjk That's a known issue with Resharper unfortunately. You'll either have to wait for the next release, or get the beta (EAP) version.

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