In the Model-View-ViewModel design pattern, we make frequent use of the INotifyPropertyChanged interface. It is the Interface that defines the necessary methods to Notify the UI when a Property has Changed. As you can see, its a very well-named Interface. 🙂
I’ve collected a few variations of the implementation and placed them all into a single ViewModelBase class. I didn’t write any of these myself – rather, I found them strewn about the internet. I’ve documented where I got some of them; others were (and probably still are) readily available from a multitude of sites. I’m making my collection available here, and I’ll give a few examples of how to use it. I’ll also explain the “evolution” my use of this interface has undergone.
To keep things organized, I usually create a folder named MVVM in my solution to house this class. You’ll want to update the namespace in this class to match your project; eventually I’m sure I’ll just compile it into a DLL once its evolution has ceased. Continue reading