Contains the completed mail message which is a result of mail merge operation.
A merged MailMessage object. The default value is a null reference (Nothing in Visual Basic).
To make this property return non-null object, you should call Replace method (or its overloads) at least once. Reset method call sets MergedMessage value back to a null reference.
The example is available in MailMerge class overview.
MailMerge Class | MailBee.Mime Namespace | MailMessage