Using start-process and -wait command in Powershell

you can use this command easy :

$myprocss = Start-Process "powershell" -PassThru 
$myprocss.WaitForExit()

this command will continue when process end .

Using Start-Process, there's an option for waiting:

Start-Process -Wait -FilePath "do_things.exe" -ArgumentList "argument another_argument"