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.Controls;assembly=Avalonia.Controls.ColorPicker"
        xmlns:controls="clr-namespace:Controls"
        x:Class="Sample.App.CustomControls"
        xmlns:av="https://github.com/avaloniaui">
    <custom:ColorPicker Name="ClrNamespaceColorPicker" />
    <av:ColorPicker Name="UriColorPicker" />
    <controls:CustomTextBox Name="UserNameTextBox" />
    <controls:EvilControl Name="EvilName" />
</Window>