Getting a free drive letter

Question

I saw the Get-NextFreeDrive function in this answer and I wondered if there was a more efficient way to do this. It appears that the function in the linked answ

Answer 1

I found out that Test-Path evaluates my empty CD-Drive as False, here is another alternative that will compare every letter in the alphabeth until it finds one that doesn't exist in filesystem, then returns that drive as output.

$DriveLetter = [int][char]'C'
WHILE((Get-PSDrive -PSProvider filesystem).Name -contains [char]$DriveLetter){$DriveLetter++}
Write-Host "$([char]$Driveletter):"