If you really insist on hiding the ORM layer behind your BO layer, then Dependency Injection should still be able to help you out. Note that you will not be able to get away from referencing the DI library from your UI thread though, because that'll be where your business objects will come from then.
I think there are a few things you can do that together could help with your design. I also think that you might want to read up on Dependency Injection as perhaps providing a better design pattern for what you want to do.
If the OR Mapper is actually doing OR, then it probably doesn't need a reference to the BL - it just needs to know the Type(s) that is (are) involved. But that is a side issue...
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.