C# vs. Vb.net sendemail

private void MailSend()
{
    DateTime Now = System.DateTime.Now;
    MailMessage message = new MailMessage();
    SmtpClient smtp = new SmtpClient("corimc04");
    smtp.Timeout = 5000;
    string recipient = recipientCB.SelectedItem.ToString();
    try
    {
        var _with1 = message;
        _with1.From = new MailAddress("Non-Stock_MRO_Administrator@gmail.com");
        _with1.To.Add(new MailAddress(email));        
        _with1.Body = "You have a package in receiving ready for pickup from " + supplier + ".\nOn Shelf: " + shelf + ".\nTracking Number: " + trackingNum;
        _with1.Subject = "MRO Automated Email for " + recipient;
        smtp.Send(message);
        message = null;
    }
    catch (Exception ex)
    {
        MessageBox.Show("Error Sending emails. " + ex.Message);
    }
    smtp = null;
    return;
}

Sub SendEmail()
    Dim smtp As New SmtpClient("corimc04")
    smtp.UseDefaultCredentials = True
    smtp.Timeout = 5000
    
    Try
        
        Dim message As New MailMessage()
        Dim _with1 = message
        _with1.From = New MailAddress("Rework_Reporter@gmail.com")
        _with1.To.Add(New MailAddress("email"))
        _with1.Body = "Rework Status for Rework WIP" & vbLf & data
        _with1.Subject = "Rework Report Updates"
        smtp.Send(message)
        message.Dispose()
    Catch ex As Exception
        Console.WriteLine("Error Sending emails. " & ex.Message)
    End Try

    smtp = Nothing
End Sub