Model View ViewModel (MVVM) is an architectural pattern inspired by the Presentation Model design pattern designed by Martin Fowler (one of the greatest experts in the agile software development and object-oriented programming). It is the de facto standard for Silverlight and WPF. So why choose this pattern and not a different one? The answer is because it naturally adapts to the data binding mechanism of Silverlight, allowing us to explore all its capacities.
Let us begin by dissecting the pattern, where we can find the following layers: