How to send email in ASP.net

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ASP.NET

Dear All,

How to send the email in asp.net. I try the below code and host on internet i got the error.

The "SendUsing" configuration value is invalid.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Runtime.InteropServices.COMException: The "SendUsing" configuration value is invalid.

I try 3 type of code but no success, the code is below.

Private Sub Frm_SendingEmail()
        'Dim MsgMail_ForgetPws As New MailMessage

        'With MsgMail_ForgetPws
        '    .From = "noreply@shaleem.net"
        '    .To = TextBox1.Text
        '    .Subject = "Test"
        '    .BodyFormat = MailFormat.Html
        '    '.Body = "Leave Number is :" & Space(1) & txtLeaveNo.Text & "and reason is :" & Space(1) & txtReason.Text
        '    .Body = "Test Email"

        'End With
        'SmtpMail.Send(MsgMail_ForgetPws)
        'MsgMail_ForgetPws = Nothing
        'Label2.Text = "Sent Successfully"

        Dim email

        email = Server.CreateObject("CDO.Message")
        email.Subject = "Sending email with CDO"
        email.From = "noreply@shaleem.net"
        email.To = TextBox1.Text
        email.HTMLBody = "Hi"
        email.Send()
        Response.Write("Mail Sent!")
        email = Nothing





    End Sub


    Public Shared Sub SendMailMessage(ByVal from As String, ByVal recepient As String, ByVal bcc As String, ByVal cc As String, ByVal subject As String, ByVal body As String)
        ' Instantiate a new instance of MailMessage
        Dim mMailMessage As New MailMessage()

        ' Set the sender address of the mail message
        mMailMessage.From = New MailAddress(from)
        ' Set the recepient address of the mail message
        mMailMessage.To.Add(New MailAddress(recepient))

        ' Check if the bcc value is nothing or an empty string
        If Not bcc Is Nothing And bcc <> String.Empty Then
            ' Set the Bcc address of the mail message
            mMailMessage.Bcc.Add(New MailAddress(bcc))
        End If

        ' Check if the cc value is nothing or an empty value
        If Not cc Is Nothing And cc <> String.Empty Then
            ' Set the CC address of the mail message
            mMailMessage.CC.Add(New MailAddress(cc))
        End If

        ' Set the subject of the mail message
        mMailMessage.Subject = subject
        ' Set the body of the mail message
        mMailMessage.Body = body

        ' Set the format of the mail message body as HTML
        mMailMessage.IsBodyHtml = True
        ' Set the priority of the mail message to normal
        mMailMessage.Priority = MailPriority.Normal

        ' Instantiate a new instance of SmtpClient
        Dim mSmtpClient As New SmtpClient()
        ' Send the mail message
        mSmtpClient.Send(mMailMessage)

    End Sub