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

    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.Buttons.xaml" />
    </ResourceDictionary.MergedDictionaries>

    <Style BasedOn="{StaticResource MetroFlatButton}" TargetType="{x:Type Button}" />

</ResourceDictionary>