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SL4 MVVM pattern: How do I write metadata driven (Entities) validations and validate them on the UI using INotifyDataErrorInfo?

Hi All, I have a entity that has metadata validations like [Required], [RegularExpression]. I have seen that the generated code g.cs file implements the INotifyDataErrorInfo interface for that entity. The property on which I have defined the regular expression is bound to a text box in the UI(XAML). How do I have the validation errors displaying for the UI? I tried using the ValidatesOnNotifyDataErrors=True, but that diod not work. What is missing here to see the validation errors in the UI.

Thanks, d

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