When you create a WPF application, the start-up window is by default one from the same project (by default called Window1.xaml).
< Application x:Class="WpfApplication1.App"
< Application.Resources >
< /Application.Resources >
< /Application >
But what if you want to use a window from another project (class library)? The pack URI scheme, used by WPF, allows you to identify and load files from: the current assembly a…