Suppose you have a class named MyClass. MyClass should have a property named Parent, Parent must be of type MyClass itself. It is necessary because MyClass wants to hold a tree structure.
How can it be done?
It's pretty straightforward:
[ActiveRecord(Lazy = true)]
public class MyClass {
[BelongsTo]
public virtual MyClass Parent { get;set; }
}
You might also want to map the collection of children.
See these articles for more information on how to run recursive queries over this: