I have a class that looks like this:
public class MyService
{
private MyService(){}
public static string GetStuff()
{
var stuffDid = new
It could be beacuse you are only debugging 1 project not both Test and Core
You can set VS to debug mutiple projects at once, you can do this by right-click your solution > Properties > Common Properties > StartUp Project
Here you can set "Multiple Startup Projects"

Just set both Core and Test to start. This may solve your issue.