Createuserwizard1_SendingMail Cannot Send Email to Alternative Recipient if Email is Blank

I have setup the following code to send out a confirmation email after creating a user in the code behind:
Sub Createuserwizard1_SendingMail(ByVal sender As Object, ByVal e As MailMessageEventArgs) Handles CreateUserWizard1.SendingMail Try e.Message.CC.Add(oCurrentUser.Email.ToString) e.Message.Body = e.Message.Body.Replace("<<firstname>>", DirectCast(CreateUserWizard1.CreateUserStep.ContentTemplateContainer.FindControl("txtFirstname"), TextBox).Text) e.Message.Body = e.Message.Body.Replace("<<lastname>>", DirectCast(CreateUserWizard1.CreateUserStep.ContentTemplateContainer.FindControl("txtLastname"), TextBox).Text) e.Message.Body = e.Message.Body.Replace("<<password>>", sPassword) e.Message.Body = e.Message.Body.Replace("<<username>>", CreateUserWizard1.UserName) ...