可以在源码之外的xaml中使用皮肤吗？(更改xaml而不重新编译)

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
    <Color x:Key="BackgroundColor">White</Color>
    <Color x:Key="ForegroundColor">Black</Color>
    <Style x:Key="ButtonStyle" TargetType="Button">
        <Setter Property="Background" Value="{DynamicResource BackgroundColor}" />
        <Setter Property="Foreground" Value="{DynamicResource ForegroundColor}" />
    </Style>
</ResourceDictionary>

<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="Skin.xaml" />
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Application.Resources>

<Button Style="{DynamicResource ButtonStyle}" Content="Click me!" />