如何用C＃缩进json数据？ Json.net

Question

所以我当前正在将json数据打印到文件中。

private void btnUnban_Click(object sender, RoutedEventArgs e)
        {
            BannedUsers user = lvBannedUsers.SelectedItem as BannedUsers;
            bannedUsernames.Remove((BannedUsers)user);
            lvBannedUsers.Items.Refresh();

            using (StreamWriter sw = new StreamWriter("banned-players.json"))
            {
                sw.Write("[" + Environment.NewLine);
                foreach (BannedUsers userdata in bannedUsernames)
                {
                    string serializedData = JsonConvert.SerializeObject(userdata);
                    sw.Write(serializedData + "," + Environment.NewLine);
                }
                sw.Write("]");

            }
        }

问题是当它打印出来时，它看起来像这样。

[
{"uuid":null,"name":"steffe","created":null,"source":null,"expires":null,"reason":null}
]

应该看起来像这样。

[
  {
    "uuid": "a7c1987f-022c-4310-bd32-21614e7e37b8",
    "name": "Stefan",
    "created": "2017-11-09 21:54:40 +0100",
    "source": "Server",
    "expires": "forever",
    "reason": "Banned by an operator."
  }
]

如何正确缩进json数据？因为当外部应用程序读取数据时会抛出错误，因为由于缩进问题而无法正确读取它。