vue-java-tutorials/CSharp/WPFTutorial/WPF-20-ReusableStyleResources/Style/ButtonStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style TargetType="Button">
        <Setter Property="Width" Value="100" />
        <Setter Property="Height" Value="40" />
        <Setter Property="FontSize" Value="20" />
    </Style>
</ResourceDictionary>