<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" HorizontalAlignment="Center" VerticalAlignment="Center"> <ComboBox> <Button>Click!</Button> <TextBlock>Hello, world</TextBlock> <StackPanel Orientation="Horizontal"> <TextBlock>Ellipse:</TextBlock> <Ellipse Fill="Blue" Width="100" /> </StackPanel> </ComboBox> </Page>