Show-XAML.ps1

function Show-Xaml {
	[cmdletbinding()]
	param(
		[parameter(Mandatory = $true, ValueFromPipeLineByPropertyName = $true, HelpMessage = 'The path to the XAML file to run')]
		[ValidateScript({Test-Path -path $_})]
		[string]$FilePath
	)

	Add-Type -AssemblyName PresentationFramework -ErrorAction SilentlyContinue
	Add-Type -AssemblyName PresentationCore -ErrorAction SilentlyContinue
	Add-Type -AssemblyName WindowsBase -ErrorAction SilentlyContinue

  $FilePath = Resolve-Path -Path $FilePath

	$xaml = New-Object -TypeName XML
	$xaml.Load($FilePath)
	$xaml.Window.RemoveAttribute('x:Class')
	$xaml.Window.RemoveAttribute('mc:Ignorable')

	$reader = [System.Xml.XmlNodeReader]::new($xaml)
	$Window = [Windows.Markup.XAMLReader]::Load($reader)

	$nodes = $xaml.SelectNodes("//*[@*[contains(translate(name(.),'n','N'),'Name')]]")

	foreach ($node in $nodes)
	{
		if (Test-Path Variable:\$($node.name))
		{
			Write-Verbose -Message "Variable $($node.name) exists"
		}
		else
		{
			New-Variable -Name $node.Name -Value ($Window.FindName($node.name))
		}
	}
	$null = $Window.ShowDialog()
}