Add Windows/

WGneu/App.xaml

@@ -2,7 +2,7 @@
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:local="clr-namespace:WGneu"
-             StartupUri="MainWindow.xaml"
+             StartupUri="Windows\MainWindow.xaml"
              xmlns:ui="http://schemas.modernwpf.com/2019">
     <Application.Resources>
         <!--<ResourceDictionary>