Just over a year ago, a couple of readers asked me about a WPF/Silverlight Panel that arranged things to make "best use" of available space without requiring the developer to set a bunch of stuff up in advance or know how many child elements there would be. Interestingly, this is not a scenario the default Panel implementations handle particularly well...
Grid [WPF/SL/WP] is capable of pretty much anything, but requires the developer to explicitly specify how everything lines up relative to the rows and columns they must manually define.
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