Pro WPF in C# 2010: Windows Presentation Foundation in .NET 4

6.2. Content Controls

A content control is a still more specialized type of controls that is able to hold (and display) a piece of content. Technically, a content control is a control that can contain a single nested element. The one-child limit is what differentiates content controls from layout containers, which can hold as many nested elements as you want.

Of course, you can still pack a lot of content in a single content control. The trick is to wrap everything in a single container, such as a StackPanel or a Grid. For example, the Window class is itself a content control. Obviously, windows often hold a great deal of content, but it's all ...