I have a situation where my parent knows about it's child (duh) but I want the child to be able to reference the parent. The reason for this is that I want the child to have the ability to designate itself as most important or least important when it feels like it. When the child does this, it moves it to the top or bottom of the parent's children.
In the past I've used a WeakReference property on the child to refer back tot he parent, but I feel that adds an annoying overhead, but maybe it's just the best way to do it.
Is this just a bad idea? How would you implement this ability differently?
Update 1: Adding more context. This is a rendering system so the parent container is a list of windows grouped together. The child item (window) that says "I'm most important!" wants to basically be rendered on the top of the rest of the windows.
The parent is just a logical container to group these children together. I can see where adding an event to signal the request to be on the top is a good idea. But implementation (what the child wants to do with the parent) aside, why wouldn't you want to have child->parent linking? Doubly linked lists do this so people can traverse to and from something.