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Not too long ago, Paul Stovell, a fellow WPF apprentice asked if there was a way to get a list of all bindings in a control on the WPF forums. After a little bit of diving into the documentation, I found the LogicalTreeHelper, a helper class that you can use to walk the logical tree of a control. (Combining that with reflection allowed him to get the bindings). Paul wanted to use this functionality for his implementation of IErrorProvider for WPF. Today I stumbled across the ValidationRule class that provides similar functionality to what IErrorProvider did. Bea Costa, WPF DataBinding guru extraordinaire, has a blog entry (look under the March 2006 archives) in which she shows its usage.

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