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The data binding functionality in WPF has several advantages over traditional models, including a broad range of properties that inherently support data binding, flexible UI representation of data, and clean separation of business logic from UI.
If the binding has the correct settings and the data provides the proper notifications, then, when the data changes its value, the elements that are bound to the data reflect changes automatically.
A typical use of data binding is to place server or local configuration data into forms or other UI controls.
In WPF, this concept is expanded to include the binding of a broad range of properties to a variety of data sources.
The following figure illustrates the different types of data flow: Note that to detect source changes (applicable to One Way and Two Way bindings), the source must implement a suitable property change notification mechanism such as INotify Property Changed.
See Implement Property Change Notification for an example of an INotify Property Changed implementation.