How to choose DevExpress themes using BarSplitButtonItem

This example demonstrates how to use the BarSplitButtonItem to select themes. All logic is incorporated into BarSplitItemThemeSelectorBehavior. So, to activate this functionality, assign the behavior to the item:

[XAML]
<dxb:BarSplitButtonItem><dxmvvm:Interaction.Behaviors><dxb:BarSplitItemThemeSelectorBehavior/></dxmvvm:Interaction.Behaviors></dxb:BarSplitButtonItem>