PM> Add-Migration PreparandoBanco Build started... Build succeeded. No DbContext was found in assembly 'ScreenSound'. Ensure that you're using the correct assembly and that the type is neither abstract nor generic. PM>
minha solução não possui dbcontext, startup.cs e appsettings.json
possui apenas program.cs
clonei deste repositório indicado pelo curso https://github.com/alura-cursos/3506-csharpWeb-screensound-curso1/tree/aula05-relacionamento
