许多人为此问题苦苦挣扎，并且有在GitHub上长期运行的线程.甚至使用最新RC3版本的人都在报告您遇到的相同问题.

Many people have struggled with this issue and there is a long running thread on GitHub about it. Even the people using the latest RC3 build are reporting the same problem that you are having.

我能够在ASP.NET Core Web应用程序中引用类库项目的唯一方法是在Visual Studio 2015 Update 2中创建Web应用程序和类库项目，而且它们都必须以target为目标. NET Framework 4.6.1.

The only way I've been able to reference class library projects in an ASP.NET Core web application is to create both the web application and the class library projects in Visual Studio 2015 Update 2. And they all have to target .NET Framework 4.6.1.

我不得不将代码从旧的类库项目复制到新的项目中.但是最后，我认为我不必浪费很多时间来解决很多人无法解决的所有变通方法，从而节省了时间.

I had to copy the code from my old class library projects to the new ones. But in the end I think I saved myself time by not having to mess with all the workarounds that don't seem to work for a lot of people.