Unable to trim/trimend "$" - powershell

Question

I am trying to modify a PS script from online resource:
Trap {"Error: $_"; Break;}
$D = [System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain()
$Domain = [ADSI]"LDAP://$D"
$Searcher = New-Object System.DirectoryServices.DirectorySearcher
$Searcher.PageSize = 200
$Searcher.SearchScope = "subtree"
$Searcher.Filter = "(objectCategory=computer)"
$Searcher.PropertiesToLoad.Add("samAccountName") > $Null
$Searcher.PropertiesToLoad.Add("lastLogon") > $Null
# Create hash table of users and their last logon dates.
$arrComp = #{}
# Enumerate all Domain Controllers.
ForEach ($DC In $D.DomainControllers)
{
$Server = $DC.Name
$Searcher.SearchRoot = "LDAP://$Server/" + $Domain.distinguishedName
$Results = $Searcher.FindAll()
ForEach ($Result In $Results)
{
$DN = $Result.Properties.Item("samAccountName")
$LL = $Result.Properties.Item("lastLogon")
If ($LL.Count -eq 0)
{
$Last = [DateTime]0
}
Else
{
$Last = [DateTime]$LL.Item(0)
}
If ($Last -eq 0)
{
$LastLogon = $Last.AddYears(1600)
}
Else
{
$LastLogon = $Last.AddYears(1600).ToLocalTime()
}
If ($arrComp.ContainsKey("$DN"))
{
If ($LastLogon -gt $arrComp["$DN"])
{
$arrComp["$DN"] = $LastLogon
}
}
Else
{
$arrComp.Add("$DN", $LastLogon)
}
}
}
Script above give me the computername & its' last logon date, however the computernames are having "$" at the end. I would like to trim the "$" in order for me to use it remove the computer from AD later. However my script is not working.
$Compdollar = $arrComp.getEnumerator() | Select-Object Key | out-string
$AllComp = #()
Foreach ($inactD in $Compdollar) {
$AllComp += $inactD.Trim("$")
}
$Allcomp
The output is still computer name with "$", can anyone tells me why it wasn't trimmed?

Answer 1

Don't use double quotes with a $ as it is treated like a variable. Use single quotes instead.
$AllComp += $inactD.Trim('$')
Or use the backtick to escape the dollar sign.
$AllComp += $inactD.Trim("`$")