The previous chapter covered the basics of text, including how to display and edit it. Two of the items discussed—TextBox and RichTextBox—are controls. The TextBlock isn’t.
If you’re coming from another technology, you may assume that anything you can see or interact with is a control, and you’d be partially right. Interaction generally requires a Control, but seeing something such as a TextBlock requires only that it be a UIElement (covered in chapter 7).
In this chapter you’ll explore the base control types