how to send an email with attachment in vb.net?

Here is a great example

Public Sub SendMailOneAttachment(ByVal From As String, _
      ByVal sendTo As String, ByVal Subject As String, _
      ByVal Body As String, _
      Optional ByVal AttachmentFile As String = "", _
      Optional ByVal CC As String = "", _
      Optional ByVal BCC As String = "", _
      Optional ByVal SMTPServer As String = "")

        Dim myMessage As MailMessage

        Try
            myMessage = New MailMessage()
            With myMessage
                .To = sendTo
                .From = From
                .Subject = Subject
                .Body = Body
                .BodyFormat = MailFormat.Text
                'CAN USER MAILFORMAT.HTML if you prefer

                If CC <> "" Then .Cc = CC
                If BCC <> "" Then .Bcc = ""

                If FileExists(AttachmentFile) Then _
                 .Attachments.Add(AttachmentFile)

            End With

            If SMTPServer <> "" Then _
               SmtpMail.SmtpServer = SMTPServer
            SmtpMail.Send(myMessage)

        Catch myexp As Exception
            Throw myexp
        End Try

    End Sub

Public Sub SendMailMultipleAttachments(ByVal From As String,_
    ByVal sendTo As String, ByVal Subject As String, _
    ByVal Body As String, _
    Optional ByVal AttachmentFiles As ArrayList = Nothing, _
    Optional ByVal CC As String = "", _
    Optional ByVal BCC As String = "", _
    Optional ByVal SMTPServer As String = "")

        Dim myMessage As MailMessage
        Dim i, iCnt As Integer

        Try
            myMessage = New MailMessage()
            With myMessage
                .To = sendTo
                .From = From
                .Subject = Subject
                .Body = Body
                .BodyFormat = MailFormat.Text
                'CAN USER MAILFORMAT.HTML if you prefer

                If CC <> "" Then .Cc = CC