Apply-XdtTransform.ps1

param
(
    [parameter(Mandatory=$true)] 
    [string]
    $Xml,

    [parameter(Mandatory=$true)] 
    [string]
    $Xdt
)

if (!(Test-Path -path $Xml -PathType Leaf))
{
    throw "XML File not found. $Xml"
}

if (!(Test-Path -path $Xdt -PathType Leaf))
{
    throw "XDT File not found. $Xdt"
}

Add-Type -LiteralPath "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\spzpqgng.yjx\Microsoft.Web.XmlTransform.dll"

$xmldoc = New-Object Microsoft.Web.XmlTransform.XmlTransformableDocument
$xmldoc.PreserveWhitespace = $true
$xmldoc.Load($Xml)

$transf = New-Object Microsoft.Web.XmlTransform.XmlTransformation($xdt)

if ($transf.Apply($xmldoc) -eq $false)
{
    throw "Transformation failed."
}

$xmldoc.Save("$PSScriptRoot\out.xml")