There are lots of differences between using a Standard Class/Portable Class Library (PCL) and Shared projects in a Xamarin solution. However, the most obvious one appears when you open any XAML file ...
Unit testing is how we ensure that the blocks of code we write do what we intended them to do. There are some open-source frameworks available to unit test .NET applications, namely, NUnit and ...
I dont know what the problem in your case is, but I can confirm that referencing a class library from another class library works in general. I do it all the time. You have to make sure the referenced ...