public User IsValidUser(User user) { using (var dataContext = new teamdonationsEntities()) { //Retireving the user details from DB based on username and password enetered by user. User user1 = dataContext.Users.Where(query => query.Email.Equals(user.Email) && query.Password.Equals(user.Password)).SingleOrDefault(); //If user is present, then true is returned. if (user1 == null) { return(null); } //If user is not present false is returned. else { return(user1); } } }