Send Mail With attachment and read content from html file

Controller Code:

public ActionResult SendEmailWithAttachement(HttpPostedFileBase fileUploader)
        {
            var senderEmail = new MailAddress("donotreplygkce@gmail.com", "AlumniJobPortal");
            var receiverEmail = new MailAddress("rupesh.konduru@gmail.com", "Receiver");
            var body = "";
            using (StreamReader reader = new StreamReader(Server.MapPath("~/Content/StudentJobApply.html")))
            {
                body = reader.ReadToEnd();
            }

            MailMessage mail = new MailMessage();
            SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
            mail.From = new MailAddress("donotreplygkce@gmail.com", "AlumniJobPortal");
            mail.To.Add("rupesh.konduru@gmail.com");
            mail.Subject = "Test Mail - 1";
            mail.Body = "mail with attachment";
            mail.IsBodyHtml = true;
         
            string fileName = Path.GetFileName(fileUploader.FileName);

            mail.Attachments.Add(new Attachment(fileUploader.InputStream, fileName));
         
            var smtp = new SmtpClient
            {
                Host = "smtp.gmail.com",
                Port = 587,
                EnableSsl = true,
                DeliveryMethod = SmtpDeliveryMethod.Network,
                UseDefaultCredentials = false,
                Credentials = new NetworkCredential("donotreplygkce@gmail.com", "password"),
             
            };
            smtp.Send(mail);
            return RedirectToAction("Index");
        }

View Code:

  @using (@Html.BeginForm("SendEmailWithAttachement", "Student", FormMethod.Post, new { @id = "form1", @enctype = "multipart/form-data" }))
        {

            @Html.ValidationSummary()

                                   

        }