Chapter 4, MVVM and Controls

1. MVVM has two main advantages. First, it is nearly impossible to unit test a .NET MAUI application if your logic is in the code-behind file – putting the logic in ViewModel is essential, as we’ll see in the upcoming chapter on unit testing. Second, MVVM nicely decouples the UI from your logic, allowing you to change one without breaking the other.
2. The all-important BindingContext. You typically assign ViewModel as the binding context for View.
3. The Entry control and the Editor control.
4. The Label control.
5. SnackBar is a highly configurable Toast – a popup that comes up from the bottom of the page and then can disappear either by its timer running out or by a user clicking on it.