title: How can I select all user_ids and exclude some user ids in an ASP.NET MVC controller?
body: <p>I created this controller and I need to exclude some user ids.</p>
  <p>This is the controller code:</p>
  <pre><code>public ActionResult Index()
  {
      var users = _context.sys_users.ToList();
      return View(users);
  }
  </code></pre>
  <p>How to select all <code>user_ids</code> where <code>user_id not in (1, 2, 3)</code> ?</p>