Hahaha, I finally know where it is wrong. It turns out that I didn't change the properties of the XML file to "embedded resources", and change the attributes of the two mapping files to "embedded resources" in recompilation, use my beloved NUNIT to test, see the green, which is cool, if someone also encounters the same problem like me
Guestbook.test.daltest.user.addddaluser: NHibernate.Mappingexception: Resource: guestbook.guestbook.data.hbm.users.hbm.xml Not found
Remember, change the properties of the XML file to embedded resources
Figure
