title: adding class library to web application with net core
body: <p>I'v created  a web application with net core and with this project</p>
  
  <pre><code>"frameworks": {
      "net461": {
        "dependencies": {
          "Core": {
            "target": "project"
          }
        }
      }    
    },
  </code></pre>
  
  <p>Then I've crated a class library net core with this project</p>
  
  <pre><code>  "dependencies": {
      "NETStandard.Library": "1.6.0"
    },
  
    "frameworks": {
      "netstandard1.6": {
        "imports": "dnxcore50"
      }
    }
  </code></pre>
  
  <p>but when I try to add the class project to web application, VS2015 tell me</p>
  
  <pre><code>The following project are not supported as reference.
  WebApplication:
  .NETFramework, Version=v4.6.1
  ClassLibrary:
  .NETStandard, Version=v1.6
  </code></pre>
  
  <p>How can I add class library to main project?</p>