What are the event routing strategies?
There are 3 types of routing strategies
Tunnelling travels towards to the leaves of the visual/logical tree
Bubbling travels towards the root of the visual/logical tree
Direct can only be handled by the object that raised the event
In WPF, if an event is defined to tunnel and bubble, tunnelling occurs first (as a preview event) and then once reaching the source, the event bubbles back to the root
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