How Can I Send Mail With Attached File (Like Image. Pdf Etc ) Using Class In My Asp.Net Project

sir,

my code is -

if (uploadfile.HasFile)
{
string Filename = uploadfile.PostedFile.FileName;
MailAttachment mailattechment=new MailAttachment(Filename,MailEncoding.Base64);
confirmationmail.Sendmailadmintouser(txtadress, txtmassege, txtSubject,mailattechment);

}
and in .Cs (Class) Page-



public static string Sendmailadmintouser(string emailidlist, string msgbody, string msgSubject,______________ mailattechment)
{
string res ="";




string mailid = string.Empty;
MailMessage msg = new MailMessage();
SmtpClient smtp = new SmtpClient();
mailid = emailidlist[j].ToString();
msg.From = new MailAddress("admin@gmail.com");
msg.To.Add(mailid);

msg.Subject = msgSubject.ToString();
msg.Body = msgbody.ToString();
msg.IsBodyHtml = true;
msg.Priority = MailPriority.Normal;
smtp.Credentials = new NetworkCredential("mukesh@gmail.com", "Password");
smtp.Port = 587;
smtp.Host = "smtp.gmail.com";
smtp.EnableSsl = true;

smtp.Send(msg);
return res="Send";





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How can Handel mailattechment File in class