System.Net.Mail & additional fields

I understand how to send mail using MailMessage, but what if I want to add additional fields to the body of the email, say a telephone and fax number, or any number of fields?  I think it should go in the body, but I am not getting all to show correctly on the email.  Can someone explain how I might expand what can be sent in the email body?  Below is the code I am starting with.

Using .NET 2.0 and VB.

Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
        'Email address to send contact for to
        Const ToAddress As String = ""
        'Create the MailMessage instance
        Dim mm As New MailMessage(tbEmail.Text, ToAddress)
        'Assign the MailMessage's properties
        mm.Subject = dlSubject.Text
        mm.Body = tbComments.Text
        mm.IsBodyHtml = False
        'Create the SmtpClient object
        Dim smtp As New SmtpClient
        'Send the MailMessage using the Web.config settings)
        'Show the EmailSentForm Panel and hide the EmailForm Panel
        EmailSentForm.Visible = True
        Me.contactform.Visible = False
        'ContactForm.Visible = False

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Toms EdisonTechnical ManagerCommented:
Mail body will take a string (plain text or HTML) that will be displayed as the email message.

If you want to include more data in the email body you can construct a string that includes all the data to be displayed and in the specific format and finally assign the string to mail body.

Something like below

dim mailbody as string
mailbody = tbComments.Text & Environment.NewLine
mailbody &= "Telephone number : " & txtTelephoneNumber.Text & Environment.NewLine
mailbody &= "Address : " & txtAddress1.Text & Environment.NewLine

If you want to have more control over the mail body you can use HTML format
mailbody &= "<b>Telephone Number :  </b>" & txtTelephoneNumber.Text & "<br/>"

then you have to set mm.IsBodyHtml = true

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simprickAuthor Commented:
Thanks much, I think html will be they way to go on the final product.
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