Temp Directory in Powershell

I deal sometimes with very large files that I need to unzip and then parse. I have had instances where I just forget to delete that huge file and it comes back to bite me. I started to unpack these files to the temp directory in order for it to get cleaned up when I clean my temp folder. Here is the simple function that I use:

function CreateTempDir
{
   $tmpDir = [System.IO.Path]::GetTempPath()
   $tmpDir = [System.IO.Path]::Combine($tmpDir, [System.IO.Path]::GetRandomFileName())
  
   [System.IO.Directory]::CreateDirectory($tmpDir) | Out-Null

   $tmpDir
}

and then I use it like this:

$tmpDir = CreateTempDir