Script is outputting an extra 0 - powershell

Question

I have the following powershell script which binds to an active directory OU and lists the computers. It seems to work fine except that it ouputs an extra 0 - I'm not sure why. Can anyone help?
$strCategory = "computer"
$objDomain = New-Object System.DirectoryServices.DirectoryEntry("LDAP:// OU=Computers,OU=datacenter,DC=ourdomain,DC=local")
$objSearcher = New-Object System.DirectoryServices.DirectorySearcher($objDomain)
$objSearcher.Filter = ("(objectCategory=$strCategory)")
$colProplist = "name"
foreach ($i in $colPropList){$objSearcher.PropertiesToLoad.Add($i)}
$colResults = $objSearcher.FindAll()
foreach ($objResult in $colResults)
{
$objComputer = $objResult.Properties;
$objComputer.name
}
Output:
0
Server1
Server2
Server3

Answer 1

You need to capture (or ignore) the output of the PropertiesToLoad.Add method, otherwise you'll get a value for each property in $colPropList.
foreach ($i in $colPropList){[void]$objSearcher.PropertiesToLoad.Add($i)}
You can simplify and shorten your script and load a bunch of properties in one call without using a foreach loop. Another benefit of the AddRange method is that it doesn't output the length of requested properties, so there's no need to capture anything.
$strCategory = "computer"
$colProplist = "name","distinguishedname"
$searcher = [adsisearcher]"(objectCategory=$strCategory)"
$searcher.PropertiesToLoad.AddRange($colProplist)
$searcher.FindAll() | Foreach-Object {$_.Properties}

Answer 2

I suspect your foreach loop is outputting the result when calling PropertiesToLoad.Add.
Try piping to out-null, like so:
foreach ($i in $colPropList){
$objSearcher.PropertiesToLoad.Add($i) | out-null
}