我对ASP.NET V5 RC1有一个问题，它不允许我从我的Web应用程序添加对类库（以4.6框架为目标）的引用。当我右键单击引用并选择“添加引用”然后选择解决方案 - >类库，它显示错误
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Microsoft Visual Studio
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The following projects are not supported as references :
- The project XYZ has a target framework that is incompatible or has version higher than the current project and cannot be referenced.
希望我只是做些傻事，但谷歌没有帮助。我试过改变类库的目标框架无济于事。谁能告诉我我做错了什么？