Avalonia/tests/Avalonia.Generators.Tests/Views/CustomControls.xml

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:custom="clr-namespace:Avalonia.ReactiveUI;assembly=Avalonia.ReactiveUI"
        xmlns:controls="clr-namespace:Controls"
        x:Class="Sample.App.CustomControls"
        xmlns:rxui="http://reactiveui.net">
    <custom:RoutedViewHost Name="ClrNamespaceRoutedViewHost" />
    <rxui:RoutedViewHost Name="UriRoutedViewHost" />
    <controls:CustomTextBox Name="UserNameTextBox" />
    <controls:EvilControl Name="EvilName" />
</Window>