Highlighting an invalid field indicates that the field needs attention, but it does not tell the user why. Feedback should be provided describing the nature of the error and how it can be corrected. In Silverlight for the browser, this is achieved using the
ValidationSummary control. Unfortunately, no such control exists in the Windows Phone FCL. But that does not stop us from making our own!
Included in the downloadable sample code is a simple control for displaying all errors that occur on a page. It is named the same as its browser counterpart:
ValidationSummary. When placed on a page, it retrieves the page and subscribes the page’s
BindingValidationError event during its