Tweak an XML Document with Powershell and LINQ

LInq Powershell.ps1

[Reflection.Assembly]::LoadWithPartialName("System.Xml.Linq") 

$roleroot = Get-Content Env:\RoleRoot

$pathToPhp = "$roleroot\approot\php\php-cgi.exe";

$content = [System.IO.File]::ReadAllText("C:\PHP\web.config");
$doc = [System.Xml.Linq.XDocument]::Parse($content);

$elements = $doc.Element("configuration").Element("system.webServer").Element("handlers").Elements("add");
$elementslist = [System.Linq.Enumerable]::ToList($elements);

foreach ($e in $elementslist) 
{
    $e.Attribute("scriptProcessor").SetValue($pathToPhp)
}

[System.IO.File]::WriteAllText("C:\PHP\web.config", $doc.ToString());