WPF Example

wpf.ps1

add-type -AssemblyName presentationframework

$xaml = @"
<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Name="Window" Title="Initial Window" WindowStartupLocation = "CenterScreen" 
    Width = "400" Height = "300" ShowInTaskbar = "True">
</Window>
"@ 

$stream=[System.IO.MemoryStream]::new([System.Text.Encoding]::Unicode.GetBytes($xaml))
$reader=[System.Xml.XmlReader]::Create($stream)
$Window=[System.Windows.Markup.XamlReader]::Load($reader)
$Window.Show()
Start-Sleep -Seconds 5
$Window.Close()