I am trying to create the Xamarin.Formsbook.Toolkit in preparation for a class I'm teaching. The old way to create it doesn't exist in the latest version of Visual Studio. I have tried selecting Cross Platform, but the only options are app and UI Test. I created a project using C# .NET Standard 2.0, then added Xamarin.Forms NuGet package, but that doesn't work either.
How can I create this class library?