function Set-enableSessionState{

    param([string]$path = $(read-host "Please enter a web.config file to read"),

          [string]$value = $(read-host "Set Session State : 'true' or 'false'"))    

    $date = (Get-Date).tostring("mm_dd_yyyy-hh_mm_s");

    $backup = $path + "_$date";

    $xml = [xml](Get-Content $path);

    $xml.Save($backup);

    $root = $xml.get_documentElement();

    $sysweb = $root["system.web"];

    $sysweb.pages.SetAttribute("enableSessionState",$value);

    $xml.Save($path);    

}