Data repeaters in .NET are very usefull to display database records onto screen. But usually, in a real world situation, you don't have enough functionality with 1 repeater.

Take for example some kind of menu structure. You want to display a category, but every category can have 0 or more subcategories. With 1 repeater, this cannot be done in a simple way. In .NET, you can use nested repeaters for this.
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