fo-dicom/Universal/SimpleViewer.Universal/App.xaml

<caliburn:CaliburnApplication
    x:Class="SimpleViewer.Universal.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:caliburn="using:Caliburn.Micro">

</caliburn:CaliburnApplication>