When dealing with the MVVM design pattern we should use Commands to trigger an Action when we press a
Button or any other control that has the Command property.
Commands has to be implemented by implementing the interface ICommand.
One implementation of an ICommand can be a DelegateCommand. The idea
is that we have to provide it with an Action<object>(execute) that should run when the Xaml control that
uses it is triggering a pressed event and if the canExecute is fulfilled.
If used with a button, the canExecute will update a buttons IsEnabled property when it returns true or false.
Using the DelegateCommand in a view model can be found here.
Binding to it in Xaml can be found here.