Wpf custom control template - relative font size

Question

I am creating a custom WPF control that let\'s say for simplicity sake has a vertical stack panel with a \"title\" TextBlock, followed by a ContentPresenter. I want the font

Answer 1

A more generic way

Value converter

public class MathConverter : IValueConverter
{
    public object Convert( object value, Type targetType, object parameter, CultureInfo culture )
    {
        return (double)value + double.Parse( parameter.ToString() );
    }

    public object ConvertBack( object value, Type targetType, object parameter, CultureInfo culture )
    {
        return null;
    }
}

Converter Resource

XAML