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

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

    <Style x:Key="WindowRegionStyle" TargetType="Window">

        <Setter Property="Background" Value="Transparent" />

        <Setter Property="Margin" Value="0" />

        <Setter Property="Padding" Value="0" />

        <Setter Property="Width" Value="400" />

        <Setter Property="Height" Value="400" />

        <Setter Property="Title" Value="{Binding Path=Content.Title, RelativeSource={RelativeSource Self}}" />

    </Style>

</ResourceDictionary>