...s a node in the AST (all nodes inherit from a basic Node class) that...

...entire xml document and can't collect nodes, which became unused. Usually xml parsers use...

...would thread through a number of free nodes available for allocation.

When a GC cycle...

...graph structures with unions, and tree/graph nodes have a tendency to accumulate many instances.

...but I would not expect that the nodes of your linked list could be subject...

You can build a queue of root nodes in terms of parent-child ownership if...

...are:
a) Allocation was amortized by allocating nodes in batches.
b) Allowed custom hash function...

...to mark resources ready for release when nodes are removed from the graph dynamically. In...

Why not?

- Make all scene graph nodes IDisposable.

- Have a using(rootNode) {} on your render...

...ll eventually get it communicating with other nodes but.. Will opensource if there is interest...