Calendar invite is received as ICS file in outlook - Laravel

I am sending calendar invites using Laravel's mail api.

The calendar looks good on gmail but shows an attachment on outlook instead of proper calendar invitation.

Gmail's output:

while on outlook it seems to be attachment:

I am creating a file with name invite.ics and I put the content inside the invite.ics file, I attach the file before sending.

 \Mail::send('emailTemplates.dummy', ['emailBody'=>$row->body],  function(Message $message) use ($to,$subject,$attachments,$cc, $body, $calendar_invitation, $companyEmail)
        {
   $message->from($companyEmail, '');
            $message->replyTo($companyEmail, 'Email Agent Meetings');
            $message->to($to, '')->subject($subject);
            $file = fopen("invite.ics","w");
            echo fwrite($file,$calendar_invitation);
            fclose($file);
            $message->attach('invite.ics', array('mime' => "text/calendar"));

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