<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" HorizontalAlignment="Center" VerticalAlignment="Center"> <Button xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"> <Button.Content>OK</Button.Content> <Button.Background>White</Button.Background> </Button> </Page>