Hi,
If you check the below link, you can see that the To, Cc and Bcc properties are from type MaillAddressCollection.
http://msdn2.microsoft.com/en-us/library/system.net.mail.mailmessage.to(vs.80).aspx
This means that you first need to create an instance of the MailAddressCollection, add the recipients to it and then assign it to the MailMessage.
Greetz,
Geert
http://geertverhoeven.blogspot.com