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

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        x:Class="Sample.App.NamedControls">
    <StackPanel>
        <TextBox Name="UserNameTextBox"
                 Placeholder="Username input"
                 UseFloatingPlaceholder="True" />
        <TextBox Name="PasswordTextBox"
                 Placeholder="Password input"
                 UseFloatingPlaceholder="True" />
        <Button Name="SignUpButton"
                Content="Sign up" />
    </StackPanel>
</Window>