<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <Style x:Key="OuterBorderStyle" TargetType="Border">
        <Setter Property="BorderBrush" Value="Black"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="CornerRadius" Value="5"/>
        <Setter Property="Padding" Value="4"/>
    </Style>
    
</ResourceDictionary>
