I create an asp.net webapp with Target framework: `.NET Framework 4.6.1`
and a classlibrary with Target framework: [`.NET Standard 2.0`](https://dotnet.myget.org/feed/dotnet-core/package/nuget/NETStandard.Library) in VS2017.
I would hope it would work fine as the [document](https://github.com/dotnet/standard/blob/master/docs/versions/netstandard2.0.md) says there are compatable:
[![enter image description here](https://i.stack.imgur.com/CXA2R.jpg)](https://i.stack.imgur.com/CXA2R.jpg)
but I got an error:

> 
> Project 'c:\users\ConfusedDev\documents\visual studio 2017\Projects\ClassLibrary\ClassLibrary\ClassLibrary.csproj' targets '.NETStandard,Version=v2.0'. It cannot be referenced by a project that targets '.NETFramework,Version=v4.6.1'.
> 
> 
> 

what am I missing for this solution to build?