App.xaml

<Application x:Class="FLY.DownBlowing.UI.Client.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
             xmlns:ut="clr-namespace:FLY.DownBlowing.UI.Client.UnitTests">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/FLY.Thick.Base.UI;component/Themes/Styles.xaml"/>
            </ResourceDictionary.MergedDictionaries>
            <ut:DownBlowingSystemServiceUt x:Key="downBlowingSystemUt" />
        </ResourceDictionary>
    </Application.Resources>
</Application>