Use Mapper.VerifyMap or Mapper.VerifyNamespace to verify a single class or all the classes within a namespace against the actual tables and columns in the database.
Dim db As IDataHelper = DataHelper.SessionFactory()
db.Mapper.VerifyMap(
GetType(Customer))Dim db As IDataHelper = DataHelper.SessionFactory()
db.Mapper.VerifyNamespace(
"KellermanSoftware.Models")