try
    {
        MailMessage mailMessage = new MailMessage();
        mailMessage.To.Add("AseelAssadi94@gmail.com");
        mailMessage.From = new MailAddress("AseelAssadi94@gmail.com");
        mailMessage.Subject = "ASP.NET e-mail test";
        mailMessage.Body = "Hello world,nnThis is an ASP.NET test e-mail!";
        SmtpClient smtpClient = new SmtpClient("smtp.gmail.com");
        smtpClient.Send(mailMessage);
        Response.Write("E-mail sent!");
    }
    catch (Exception ex)
    {
        Response.Write("Could not send the e-mail - error: " + ex.Message);
    }