using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Net.Mail; namespace TASK11 { public partial class WebForm1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { try { MailMessage mail = new MailMessage(); mail.To.Add(TextBox1.Text); mail.From = new MailAddress("youremail@domain.com"); // Replace with your email mail.Subject = TextBox2.Text; mail.Body = TextBox3.Text; SmtpClient smtp = new SmtpClient(); smtp.Host = "smtp.gmail.com"; // Replace with your SMTP server smtp.Port = 587; // Replace with SMTP port smtp.Credentials = new System.Net.NetworkCredential("username", "password"); // Replace with your credentials smtp.EnableSsl = true; smtp.Send(mail); Label4.Text = "Email sent successfully!"; } catch (Exception ex) { Label4.Text = "Error: " + ex.Message; } } } }