<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <ControlTheme TargetType="Separator" x:Key="{x:Type Separator}">
        <Setter Property="Focusable" Value="False" />
        <Setter Property="Background" Value="{DynamicResource MainBorderColor}" />
        <Setter Property="Opacity" Value=".8" />
        <Setter Property="Margin" Value="2" />
        <Setter Property="Height" Value="1" />
        <Setter Property="Template">
            <ControlTemplate>
                <Border
                    Background="{TemplateBinding Background}"
                    BorderBrush="{TemplateBinding BorderBrush}"
                    BorderThickness="{TemplateBinding BorderThickness}"
                    CornerRadius="{TemplateBinding CornerRadius}"
                    Opacity="{TemplateBinding Opacity}" />
            </ControlTemplate>
        </Setter>
    </ControlTheme>
</ResourceDictionary>