sorting output in csv file

cls

$pc = Get-Content "c:\temp\tmp\XP_I_Can_Ping.txt"

$results = @()

foreach ($machine in $pc)

{

$computerName = Get-WMIObject -class Win32_ComputerSystem -computername $machine | Select-Object -ExpandProperty name

    $computerOS = Get-WmiObject -Class Win32_OperatingSystem -ComputerName $machine | Select-Object -ExpandProperty version

    $getip = ([version](Test-Connection $machine -Count 1).IPV4Address.IPAddressToString).Build; 

    $desc = (Get-ADComputer $machine -Properties Description).description #this is cleaner in the output

$results += New-Object PSObject -Property:@{PCName=$computerName;'OS Version'=$ComputerOS;'IP vLan'=$getip;'Description'=$desc}

}

$results | Export-Csv c:\temp\tmp\XPOutput.csv

The above code works and does what I want.  But I have a question on the output.   I get $computername, $computeros, $getip, $desc and in my $results line I have them setup in the same order.  yet my XPOutput.CSV file has them in this order.  OS Version, Description, PCName, IP.    How come?  I did not see any Sort switch on New-Object so how do you sort them in the order you want?