Powershell passing XMLDocument through function calls

Question

I'm trying to pass a System.XML.XMLDocument object through function calls, however that object is changed to System.Object[] after function call.

More specifically, I have a function like this:

function GenerateXml()
{

    [System.XML.XMLDocument]$xmlDoc=New-Object System.XML.XMLDocument
    $declaration = $xmlDoc.CreateXmlDeclaration("1.0", "utf-8", "yes")
    $xmlDoc.AppendChild($declaration)

    [System.XML.XMLElement]$root = $xmlDoc.CreateElement("dummy")
    $root.SetAttribute("Name", "dummy value")
    $xmlDoc.AppendChild($root)
    $xmlDoc
}

[System.XML.XMLDocument]$xmlDoc = GenerateXml

This will output an error like:

Cannot convert value "System.Object[]" to type "System.Xml.XmlDocument".

So what is the best way of passing a XMLDocument through function calls?

Answer 1

Turns out Powershell will return all the output from a method to an array. To get the actual return value, you can either get the last member of the output array or just don't output anything else other than what you actually want.