This one gets me every time, and it seems each time I do it, it’s a slightly different scenario so looking back at my old stuff isn’t helping me make it work. I have an XML file formatted as

<Configuration>  
  <StudySearchLayout>
    <Column Id="LastName" Hidden="n" />
    <Column Id="FirstName" Hidden="n" />
    <Column Id="Gender" Hidden="y" />
  </StudySearchLayout>
</Configuration>

My main objective is to hidden="n" on all columns. I tried this:

$File = ".File.xml"

[xml]$XML = gc $File

$columns = $XML.Configuration.StudySearchLayout.Column

ForEach($column in $columns){

    $column.hidden = "n"
    
}

$XML.Save($File)

If I go back and run $columns.hidden, PowerShell shows the value I’m looking for, but it doesn’t appear to actually save anything in the file… Can someone help me figure out what I’m doing wrong?