I should preface that my experience primarily comes from Scala and dotnet, I don't really use Java. Sure you can play Google whackamole but a lot of times the

I should preface that my experience primarily comes from Scala and dotnet, I don't really use Java. Sure you can play Google whackamole but a lot of times the compiler message alone isn't going to help you and when you Google the message you there are 20 questions on SO where the top answer has 1000 votes and says something like, delete the bin folder and restart. But that's not the issue. The issue is your importing two projects that are targeting different dotnet frameworks. The dependency project builds fine on its own. They project using the dependency just loudly proclaims that the imported type doesn't exist. Rider gives you a few squiggly lines and tells you "Computer says no" You yourself have to figure out that one of the projects has changed targeting framework while the other one hasn't