<Button Content="I'm a Button; click me">
    <Button.Template>
        <ControlTemplate TargetType="Button">
            <TextBlock Text="{TemplateBinding Content}" />
        </ControlTemplate>
    </Button.Template>
</Button>

<Button Content="I'm a Button; click me"> <Button.Template> <ControlTemplate TargetType="Button"> <TextBlock Text="{TemplateBinding Content}" /> </ControlTemplate> </Button.Template> </Button>

<Button FontFamily="Marlett" FontSize="20" Content="5"/>
<Button FontFamily="Marlett" FontSize="20" Content="6"/>

<Button FontFamily="Marlett" FontSize="20" Content="5"/> <Button FontFamily="Marlett" FontSize="20" Content="6"/>