title: Referencing libraries in .NET Framework not in .NET Standard
body: <p>I'm currently in progress of migrating a class library project to dotnet cli (RC2) from DNX (RC1). Previously, the project referenced the .NET v4.5.1 framework libraries, and the <code>project.json</code> file looks like this:</p>
  
  <pre><code>  "frameworks": {
      "net451": {
        "frameworkAssemblies": {
          "System.Runtime": "4.0.10.0",
          "System.Web": "4.0.0.0",
          "System.DirectoryServices": "4.0.0.0",
          "System.DirectoryServices.AccountManagement": "4.0.0.0",
          "System.ServiceModel": "4.0.0.0",
          "System.ServiceModel.Security": "4.0.0.0"
        }
      }
    }
  </code></pre>
  
  <p>Now as far as I'm aware, (and I could be wrong,) unlike DNX, the new dotnet Cli doesn't support .NET 4.5.1, and instead supports .NET Standard.</p>
  
  <p>So problem is, .NET Standard doesn't have all the libraries I want. What do I have to change so I can reference the .NET 4.5.1 framework libraries? I read about the imports statement, but I can't get it to work. Here is what I have so far <strong>(updated)</strong>:</p>
  
  <pre><code>  "frameworks": {
      "net451": {
        "frameworkAssemblies": {
          "System.Runtime": "4.0.10.0",
          "System.Web": "4.0.0.0",
          "System.DirectoryServices": "4.0.0.0",
          "System.DirectoryServices.AccountManagement": "4.0.0.0",
          "System.ServiceModel": "4.0.0.0",
          "System.ServiceModel.Security": "4.0.0.0"
        }
      },
      "netstandard1.5": {
        "imports": [ "dnxcore50", "portable-net451+win8" ]
      }
    }
  </code></pre>
  
  <p>I get errors such as this:<a href="https://i.stack.imgur.com/cVDVL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cVDVL.png" alt="Cannot reference ParallelQuery"></a></p>
  
  <p>I am a bit lost on what else I need to do... Any ideas?</p>