>>Thanks for the clarification. Yes, there is no intellisense (I've been playing with it in VS2010).
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>>That's a good point about ExpandoObject: assuming it is, that means the columns can be bound to WPF controls.
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>Actually I'm not sure if ExpandoObject properties can bind or not. Underneath the covers the properties are stored in a dictionary and I don't think Reflection actually works against Expando objects so I kind of doubt it works but I'm not sure... interesting to try out (don't have time this second tho :-))
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Wouldn't you just bind against the properties themselves (not the columns of the underlyng dictionary)? From what Markus has done this sounds like it works just fine:

http://www.markusegger.com/Blog/Development.aspx?messageid=3dfccfc5-1a30-4af1-a924-da22f3ff6057