try{foreach (GridViewRow gv in GDStudents.Rows){if (gv.Cells[5].Text != "";){EmailChange:string fromEmailid = " ";if (Email_NO == 1)fromEmailid = "[email protected]";else if (Email_NO == 2)fromEmailid ="[email protected]";elsefromEmailid ="";  
 MailMessage mailmess = new MailMessage();SmtpClient smtpserver = new SmtpClient("smtp.gmail.com");smtpserver.Credentials = new NetworkCredential("[email protected]","1234");smtpserver.Host = "smtp.gmail.com";smtpserver.Port = 587;smtpserver.EnableSsl = true;mailmess.From = new MailAddress("[email protected]","Confirmation");mailmess.IsBodyHtml = true;mailmess.Subject = "ConfirmationMail";string body2 = "<table>";body2 = body2 + "<tr><td><b>Dear <font color='Maroon'><b>" + gv.Cells[1].Text.ToString().Trim() + ",</font></td></tr>";body2 = body2 + "<tr><td><br/>   <font face='Arial' size='2' color='Navy'><b> " + TxtMessage.Text.ToString().Trim() + " </font></td></tr>";body2 = body2 + "</table>";mailmess.Body = body2;  
  mm.To.Add(new MailAddress(gv.Cells[5].Text.ToString().Trim()));
                Thread threademail = new Thread(delegate()
                {
                    sc.Send(mm);
                });
                threademail.IsBackground = true;
                threademail.Start();
            }
        }
        catch (Exception e11)
        { }
  
 i am sending mail the below Gridview data to send mail.
txtmessage.text = "Dear Students, Thanks for booking the course";
 
In run mode In gridview as follows 
 StudentName     Email
 
    
 
 
 
for that how can i do in asp.net using c#.