how to send mail thorugh asp.net code

Using System.Web.Mail

MailMessage msg = new MailMessage();

msg.To = "das@silicomm.com";
msg.From = "das@aspalliance.com";
msg.Subject = "test";
//msg.BodyFormat = MailFormat.Html
msg.BodyFormat = MailFormat.Text;
msg.Body = "hi";

msg.Attachments.Add(new MailAttachment(Server.MapPath("EMAIL1.ASPX")));

SmtpMail.SmtpServer = "localhost";

SmtpMail.Send(msg);
msg = null;

lblMsg.Text = "An Email has been send to " + "das@silicomm.com";

Public Sub SendMail(ByVal UserName As String, ByVal Pwd As String, ByVal From As String, ByVal To1 As String, ByVal Subject As String, ByVal Body As String)


       Dim mailPath As New System.Net.NetworkCredential(UserName, Pwd)
       Dim client As New SmtpClient("smtp.gmail.com", 587)
       client.Credentials = mailPath
       client.EnableSsl = True

       Dim SendFrom As New MailAddress(From)
       Dim SendTo As New MailAddress(To1)



       Dim MyMessage = New System.Net.Mail.MailMessage(SendFrom, SendTo)

       MyMessage.Subject = Subject
       MyMessage.Body = Body
       MyMessage.DeliveryNotificationOptions=DeliveryNotificationOptions.OnFailure



       client.Send(MyMessage)

       lblMsg.Text = "Your message has been sent successfully To:- " & "," & To1

   End Sub

'this is function that use 

   Protected Sub btnSendmail_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSendMail.Click

       'Dim strEmailIDList As String = ""
       'Dim Success As Boolean = True
       Try
           Dim Username As String = Session("EmailID")
           Dim Pwd As String = Session("Password")
           Dim From As String = Session("EmailID")
           Dim To1 As String = Session("Email")
           'Dim cc As String = txtCC.Text
           Dim Subject As String = txtSubject.Text
           Dim Body As String = txtBody.Text

           SendMail(Username, Pwd, From, To1, Subject, Body)


       Catch ex As Exception
           lblMsg.Text = "The message could not be sent" + ex.Message
       End Try
   End Sub