protected void btnSignIn_Click2(object sender, EventArgs e) { //Using a Session to determine whether User has LoggedIn or Not Session["Status"] = 0; int username = Convert.ToInt32(txtUserName.Text); string password = txtPassword.Text; var res = b.Authenticate(username, password); if (res == false) { Response.Write("Invalid Credentials"); } else { Session["Status"] = 1; Response.Redirect("AvailaibleFlights.aspx"); } }