EO.Wpf Button offers the same functionalities as WPF standard Button control, but also offers the ability to switch skins/themes programmatically. For example, the following code switches the Button to classic skin:

<!--A Button that uses the "Classic" skin. Note this does
not affect any other controls -->
<eo:Button eo:ThemeManager.SkinName="Classic">Hello</eo:Button>

See here for more information on how to use skin and theme features.