System.Windows.Documents.AdornerDecorator—This control is used for styling of the

control to which the element belongs.

1.   System.Windows.Documents.AdornerLayer—The AdornerLayer control represents

the surface for rendering adorners.

2.  System.Windows.Controls.ContentPresenter—This control is used to specify the

location in the visual tree wherein content should be loaded for a specific control. In this

case, the ContentPresenter control will specify where the contents of

ElementTrees.Sample will be located.