OnPropertyChangedName

OnPropertyChangedName is a concept primarily found in object-oriented programming, particularly within frameworks that facilitate data binding. It refers to a notification mechanism that allows objects to signal to other parts of an application that a specific property's value has changed. This is crucial for maintaining consistency and updating user interfaces or other dependent components in real-time.

The implementation typically involves an event, often named `PropertyChanged`, which is raised by the object when one of its properties is modified. This event usually passes an argument that specifies the name of the property that has changed. This allows subscribers to the event to identify which specific property requires attention and to react accordingly, such as updating a displayed value or re-evaluating a condition.

This pattern is a cornerstone of modern UI frameworks like WPF, UWP, Xamarin, and .NET MAUI in .NET, as well as frameworks in other languages and platforms. It promotes loose coupling between objects, as the object raising the event does not need to know about the specific consumers of its property changes. Consumers, in turn, can subscribe to these notifications without needing to constantly poll the object for changes, leading to more efficient and responsive applications.

The `INotifyPropertyChanged` interface is a common contract that defines this notification capability. Objects implementing this interface are expected to raise the `PropertyChanged` event. This standardization ensures interoperability and predictable behavior across different components and frameworks.