title: Using Microsoft.AspNetCore.All package in netstandard
body: <p>At the moment I'm porting an asp web api to .Net Core.</p>
  
  <p>The api uses a Class library which provides some implementations of the ActionFilterAttribute class.</p>
  
  <p>So I have to port this class library as well.
  When I tried to add the nuget package Microsoft.AspNetCore.All to the class library I recived this error:</p>
  
  <blockquote>
    <p>Package Microsoft.AspNetCore.All 2.0.0 is not compatible with
    netstandard2.0</p>
  </blockquote>
  
  <p>When I change the target framework to netcoreapp2.0, I'm able to install the package, but of course I need an entry point for this target type.</p>
  
  <p>How can I create a netcore class library which can use the Microsoft.AspNetCore.All package</p>
  
  <p>Greetings</p>