XAML in Windows PowerShell

xaml.ps1

Add-Type -AssemblyName presentationframework
[xml]$xaml = @'
<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="100" Width="200" ResizeMode="NoResize">
    <Grid>
        <Button Name="button1" Content="XAML"/>
    </Grid>
</Window>
'@
$reader=(New-Object System.Xml.XmlNodeReader $xaml)
$window=[Windows.Markup.XamlReader]::Load( $reader )
$button = $window.FindName("button1")
$button.add_Click({ $window.Close() })
$window.ShowDialog() | out-null