How to build a Bar UI in accordance with the MVVM pattern

In this example, we combined two approaches to build a Bar UI in accordance with the MVVM pattern: 
1. The first approach assumes using DXBar's Implicit Data Templates feature, which allows you to associate Data Templates with certain View Models implicitly.
2. The second approach is to explicitly assign templates to View Models by using the ...Template and ...TemplateSelector properties.
You can find detailed information about these approaches here.