#283 – A Window Can Have Only a Single Child Element

In WPF, a Window can have only a single child element.  Window inherits from ContentControl, which is a control that contains a single child element, referenced by its Content property.

Your window might have a single simple child control, like a Button.

<Window>
	<Button Content="Big Daddy Button"/>
</Window>

Since having a single control in your application is not very useful, it’s more common that the single child control of a Window is a container control like StackPanel, which in turn can contain multiple child elements.

<Window>
	<StackPanel>
		<Label Content="You can enter your name here:"/>
		<TextBox />
		<Button Content="Push to Continue"/>
	</StackPanel>
</Window>

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

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