How do I append a User Mail signature in Outlook to an email created programmtically

Question

I have an OL addin ( c# com using addin express) that is doing something like this

mailItem = (Outlook.MailItem)OutlookApp.CreateItem(Outlook.OlItemType.olMailItem);
mailItem.To = ReceipientEmailAddress;
mailItem.Subject = "SOME TEXT";
mailItem.Body = NewBody;
mailItem.Display(false);

This is however causing the default signature to disappear i am assuming this is because a newBody is being set I am not able to read the signature in any way or cause the mail creation to include the signature Please Help Thanks

oh this is OL 2007 .NET 2.0