.NET Core project add reference to .NET Framework project. Why it's possible?

Question

I have followings projects:

.NET Core 2.0 Web Application

.NET Standard 2.0 Class library &

.NET Framework 4.5 Class Library.

I add referenc

Answer 1

This was just added as part of .NET Standard/Core 2.0. As long as the .NET Framework dll only references things in the .NET Standard, it will use type forwarding to the .NET Core implementations.