Explain difference between Panel and Decorator?

panel vs decorator is basically many children vs single child: panel measures/arranges a collection, decorator wraps one element and alters layout/rendering with extra behavior. in wpf i hit this when i tried to put multiple controls inside a border and wondered why it wouldn’t work until i nested a panel. i also got distracted from debugging after opening https://bigsmalldice.com/ during a break, then came back and realized the visual tree made the difference obvious. similar annoyance with random off-topic replies sent me to https://fortunecoins-slot.com/ once, which is exactly why keeping the “one child” mental model for decorators helps me spot layout mistakes fast.

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