Logical Tree in WPF

In WPF, you add content to elements using properties. For example, you add items to a ListBox control using its Items property. By doing this, you are placing items into the ItemCollection of the ListBox control. To add elements to a DockPanel, you use its Children property. Here, you are adding elements to the UIElementCollection of the DockPanel.

Element Trees in WPF

The tree structures in WPF are known as the element tree. If you create an application page in XAML, then the tree structure is created based on the nesting relationships of the elements in the markup. If you create an application in code, then the tree structure is created based on how you assign property values for properties that implement the content model for a given element. In Windows Presentation Foundation (WPF), there are really two types of element trees: the logical tree and the visual tree