$from = "D:\Program Files\ibm\cognos\tm1_64\cmplst.txt"
$to = "C:\compare"
Copy-Item $from $to -Recurse -Force
$From = "xxx@gmail.com"
$To = "xxxx@gmail.com"
$Cc = "xxxx@gmail@gmail"
$Subject = "String Comparison"
$Body = (Compare-Object (Get-Content C:\compare\cmplst-1.txt) (Get-Content C:\compare\cmplst.txt) -includeequal).InputObject
foreach($line in $comparison)
{
  $Body+= $line
}
$SMTPServer = "smtp.gmail.com"
$SMTPPort = "587"
Send-MailMessage -From $From -to $To -Cc $Cc -Subject $Subject -Body $Body -SmtpServer $SMTPServer -port $SMTPPort -UseSsl -Credential xxx@gmail.comxxx(password og gmail)
EOH

"Cannot convert 'System.Object[]'
to the
    type 'System.String' required by parameter 'Body'. Specified method is not supported"