<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:system="clr-namespace:System;assembly=mscorlib">

    <system:Double x:Key="LargeFontSize">24</system:Double>
    <system:Double x:Key="HeadFontSize">20</system:Double>
    <system:Double x:Key="SubHeadFontSize">16</system:Double>
    <system:Double x:Key="TextFontSize">12</system:Double>

</ResourceDictionary>