private bool ValidateUser(string userName, string password) { bool isValid = false; using (var db = new CarRentalSystemDBEntities5()) { var user = db.Customers.FirstOrDefault(u => u.Username == userName); if (user != null) { if (user.Password == password) { Session["Customer_Id"] = user.Customer_Id; Session["FirstName"] = user.FirstName; Session["LastName"] = user.LastName; Session["UserName"] = user.Username; Session["Email"] = user.Email; Session["Phonenumber"] = user.Phonenumber; isValid = true; } } } return(isValid); }