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在过去的6个小时里，我一直试图在文本框中显示一个json文件的内容，但一无所获。

private thruster Getthruster()
        {
            string text = File.ReadAllText(@"./thrusters.json");
            List<thruster> test = JsonConvert.DeserializeObject<List<thruster>>(text);
        
            textBox1.Text = text;
        
            foreach (var item in test)
            {
                textBox1.Text = item.type;
            }
            return Getthruster();
        }

        public class thruster
        {
            public string id { get; set; }
            public string type { get; set; }
            public string placement { get; set; }
        }

{
  "thruster": [
    {
      "id": 1,
      "type": "tunnel",
      "placement": "bow"
    },
    {
      "id": 2,
      "type": "tunnel",
      "placement": "bow"
    },
    {
      "id": 3,
      "type": "azimuth",
      "placement": "bow"
    },
    {
      "id": 5,
      "type": "azimuth",
      "placement": "stern"
    },
    {
      "id": 5,
      "type": "tunnel",
      "placement": "stern"
    },
    {
      "id": 6,
      "type": "azimuth_propulsion"
    },
    {
      "id": 7,
      "type": "azimuth_propulsion"
    }
  ]
}