String sDEFAULTUSER = "CN1801K";
            String sDEFAULTPWD = "Pa$$w0rd";

            String sLoginId = "";
            String sPassword = "";

            sLoginId = txtuserlogin.Text;
            sPassword = txtuserpass.Text;           // 22Jan19




            {

                if (sLoginId == sDEFAULTUSER)
                {
                     if(sPassword == sDEFAULTPWD)
                    {

                        Response.Redirect("mainpage.aspx");
                    }



                }
                else
                {
                    lblErrorLoginId.Text = "Invalid UserId! Pls try again!";
                    lblErrorPassword.Text = "Wrong Password!";


                }
            }
        }