protected void Buttonpsw_Click(object sender, EventArgs e)
         {
        string mainconn = ConfigurationManager.ConnectionStrings["dbconnection"].ConnectionString;
        SqlConnection con = new SqlConnection(mainconn);
        string sqlquery = "select Email,Password1 from [dbo].[Users1] where Email =@Email";
        SqlCommand sqlcommand = new SqlCommand(sqlquery, con);
        sqlcommand.Parameters.AddWithValue("@Email",Textemail.Text);
        con.Open();
        SqlDataReader sdr = sqlcommand.ExecuteReader();
        if (sdr.Read())
        {

            string username = sdr["Email"].ToString();
            string Password = sdr["Password1"].ToString();
            MailMessage ms = new MailMessage("roqaia.alrfou@gmail.com",Textemail.Text);
            ms.Subject = "Your password!";
            ms.Body = string.Format("Hello : <h1>{0}</h1> is your Email ID <br/> Your Password is <h1>{1}</h1>",username,Password);
            ms.IsBodyHtml = true;
            SmtpClient smtp = new SmtpClient();
            smtp.Host = "smtp.gmail.com";
            smtp.EnableSsl = true;
            NetworkCredential nc = new NetworkCredential();
            nc.UserName = "roqaia.alrfou@gmail.com";
            nc.Password = "133";
            smtp.UseDefaultCredentials = true;
            smtp.Credentials = nc;
            smtp.Port = 587;
            smtp.Send(ms);
            Labelmsg.Text = "Your Password has been sent to" + Textemail.Text;
            Labelmsg.ForeColor = Color.Green;


        }
        else
        {
            Labelmsg.Text = Textemail.Text+" This Email ID isn't Exist! Please sign up";
            Labelmsg.ForeColor = Color.Red;

        }

<connectionStrings>
        <add name="dbconnection"
             connectionString="server= USER-PCSQL;Data
   Source=localhost;Initial Catalog=Tracking_System;
   Integrated Security=True;Pooling=False
   ; Trusted_Connection=True;"
         providerName="System.data.sqlclient" />
</connectionStrings>