3rdpartylibs/fastreports.wpf/Demos/WPF/Main/App.xaml

<Application x:Class="WpfDemo.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Application.Resources>
    </Application.Resources>
</Application>