Removes empty lines from a file

RemoveEmptyLines.ps1

$logFile = "$pwd\dns.log"
$newLogFile = "$pwd\dns_cleaned.log"

$sr = New-Object System.IO.StreamReader($logFile)
$sw = New-Object System.IO.StreamWriter($newLogFile)

$line = $sr.ReadLine()

while ($line -ne $null) {
    if ($line.trim() -ne "") {
        $sw.WriteLine($line)
    }
    $line = $sr.ReadLine()
}

$sw.flush()
$sw.close()