nHibernate many-to-many mapping delete association only
===

I've seen this question asked here but I haven't found one that is answered correctly.  I have a many-to-many mapping with these tables:

    Collection
    Items
    Collection_Items

A **Collection** has many **Items** and an item can belong to many **Collections**.  **Collection_Items** is the joining table.

If (using **nHibernate**) I want to delete an **Item** or **Collection** and have it delete it's joining associations *without* also deleting it's children... how do I do that?  

If you have an example it doesn't matter if it's XML or Fluent or attributes or whatever.

Also, I have foreign key constraints connection the two tables to the joining table.

Any examples out there?


Thanks!