ShrlAlgoToolkit/WPFluent/Controls/Frame/Frame.xaml

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

    <Style TargetType="{x:Type Frame}">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="NavigationUIVisibility" Value="Hidden" />
        <Setter Property="Padding" Value="0" />
        <Setter Property="Margin" Value="0" />
        <Setter Property="Focusable" Value="False" />
        <Setter Property="SnapsToDevicePixels" Value="True" />
    </Style>

</ResourceDictionary>