json：

{
"Information":
[
  {
    "LocationName": "通道1",
    "Points": [
      [ 1, 2, 3, 4 ],
      [ 5, 6, 7, 8 ]
    ]
  },
  {
    "LocationName": "通道2",
    "Points": [
      [ 11, 2, 3, 4 ],
      [ 5, 6, 7, 8 ]
    ]
  }
]
}

讀：

                    string fileName = @"D:\KSIMSCfg\test.json";                          
                    StreamReader file 
 
= File.OpenText(fileName);
                    JsonTextReader reader = new JsonTextReader(file);
                    JObject jsonObject = (JObject)JToken.ReadFrom(reader);
                    MessageBox.Show((jsonObject["Information"]).ToList()[1]["Points"][0][0].ToString());//得到11
                    file.Close();
 

寫：

  string jsonString = File.ReadAllText(fileName, System.Text.Encoding.UTF8);//讀取檔案
            JObject jobject = JObject.Parse(jsonString);//解析成json
            jobject["Information"][0]["LocationName"] = "通道1";//替換需要的檔案
            string convertString = Convert.ToString(jobject);//將json裝換為string
            File.WriteAllText(fileName, convertString,System.Text.Encoding.UTF8);//
 
將內容寫進jon檔案中