The View Models
When you create an application in WPF like the TimeTracker application, you will have a project that has some views, and each view will display some data. You can decide to display this data in a lot of different ways; some of them will require more effort than others.
In any case, you will need to present to each view a specific set of values to be displayed and a specific presentation logic that will be applied to the UI. In WPF you provide this information to the view by using an object that takes the name of DataContext. In WPF you can think of the DataContext dependency property of an element as a container of data; more precisely, it is the container for the data bound to that specific element. Because the DataContext property ...
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