<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:Controls="clr-namespace:MahApps.Metro.Controls">

    <Style x:Key="CleanWindowCommandsStyleKey" TargetType="{x:Type Controls:WindowCommands}">
        <Setter Property="Controls:ControlsHelper.ContentCharacterCasing" Value="Upper" />
        <Setter Property="SeparatorHeight" Value="11" />
        <Setter Property="ShowLastSeparator" Value="False" />
    </Style>

</ResourceDictionary>