XAML Events
Event handling is a notification service provided by the framework. An event is initiated by an object based on some type of action at runtime. Like any other presentation layer development technology, XAML and WPF/Silverlight framework provide event-handling capability so that you can manage user input, performing actions and processing business logic based on specific user input actions such as selecting a value or date, clicking a button, moving the mouse, or pressing a key. In addition, the event notification system lets you handle changing conditions, such as a dependency property value change notification or a validation event so that you can evaluate an entered value and generate error messages.
The object that raises the event ...
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