How to attach multiple files and send as email attachments in ASP.Net

 try
        {
            string str = "";
            HttpFileCollection fileCollection = Request.Files;
            for (int i = 0; i < fileCollection.Count; i++)
            {
                HttpPostedFile uploadfile = fileCollection[i];

                string fileName = Path.GetFileName(uploadfile.FileName);
               // fileName = GetUniqueFileName(fileName);
                if (uploadfile.ContentLength > 0)
                {
                    uploadfile.SaveAs(Server.MapPath("~/Upload/MailAttachments/") + fileName);
                    str += fileName + ",";
                    //string path = Server.MapPath("~/Upload/MailAttachments/") + fileName;
                    //uploadfile.SaveAs(Server.MapPath(path));
                    //str = path;
                }
            }

            string BodyText = "";
            BodyText = "<b>Dear User,</b><br><br>";
            BodyText = BodyText + "Following are the details of the patient who has requested for a appointment you through your website 'ahms.co.in'<br /><br />";
            BodyText = BodyText + "Patient Name:  " + txtPatient.Text + "<br>";
            BodyText = BodyText + "Email :  " + txtEmail.Text + "<br>";
            BodyText = BodyText + "Mobile Number:  " + txtMobile.Text + "<br>";
            BodyText = BodyText + "Health issues:  " + txthealthissue.Text + "<br> <br />";
            BodyText = BodyText + "Appointment Date:  "+txtDate.Text+"<br/>";
            BodyText = BodyText + "Time Slot choosed: " + ddtimeslot.Text + "<br/>";
            BodyText = BodyText + "Thanks,<br />Web Admin";

            //arif.khan@dynamicconsultant.net info@ahms.co.in

            if (obj.SendMail("info@ahms.co.in", "mail@ahms.co.in ", "Request for Appointment from : ahms.co.in", BodyText, str) == "mailsend")
                {
                    lblMsg.Text = "Thankyou!!We'll get back to you soon";
                    Reset();
                }
                else
                {
                    lblMsg.Text = "Mail server encounter an error.Try again.";
                   
                }
            
            
        }
 public String SendMail(String MailTo, String MailFrom, String Subject, String MailBody, string pAttachmentPath)
    {
        try
        {
            MailMessage msg = new MailMessage();
            MailAddress mailaddressfrom = new MailAddress(MailFrom);
            MailAddress mailaddressTo = new MailAddress(MailTo);
            msg.From = mailaddressfrom;
            msg.To.Add(mailaddressTo);
            msg.Subject = Subject;
            msg.Body = MailBody;
            msg.IsBodyHtml = true;

            if (pAttachmentPath.Trim() != "")
            {
                System.Net.Mail.Attachment MyAttachment = new System.Net.Mail.Attachment(pAttachmentPath);
                msg.Attachments.Add(MyAttachment);
                msg.Priority = System.Net.Mail.MailPriority.High;
            }
            SmtpClient objSmtp = new SmtpClient();
            //objSmtp.Host = "mail.nissindia.com";
            objSmtp.Send(msg);
            return "mailsend";
        }
        catch (Exception ex)
        {
            return ex.ToString();
        }
    }

the conrol jump in catch block or showing error file could not be found, how to remove it please help.

Thanks in adv.