INotifyPropertyChanged WPF

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INotifyPropertyChanged allows WPF UI elements (via the standard data binding mechanisms) to subscribe to the PropertyChanged event and automatically update themselves. For example, if you had a TextBlock displaying your FirstName property, by using INotifyPropertyChanged, you can display it on a form, and it will automatically stay up to date when the FirstName property is changed in code.

The View just subscribes to the event – which tells it everything necessary. The event includes the name of the changed property, so if a UI element is bound to that property, it updates.

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