class JosnUnit
    {
        public string Guid { get; set; }
        public string Index { get; set; }
        public string Title { get; set; }
        public string subTitle { get; set; }
        public string Type { get; set; }
        public string IsLeaf { get; set; }
        public string GroupName { get; set; }
        public string[] Children { get; set; }
        public string UserParam { get; set; }

    }

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace json解析
{
    class Program
    {
        static void Main(string[] args)
        {
       
            string path = AppDomain.CurrentDomain.BaseDirectory + "\\信号源列表.txt";
            StreamReader streamReader = new StreamReader(path);
            //JsonReader reader = new JsonTextReader(streamReader);

            //while (reader.Read())
            //{
            //    Console.WriteLine(reader.Value);
            //}
            JsonSerializer serializer = new JsonSerializer();
            JosnUnit[] p1 = (JosnUnit[])serializer.Deserialize(new JsonTextReader(streamReader), typeof(JosnUnit[]));
　　　　　　　streamReader.Dispose();
            string str = p1[1].Guid;
            Console.ReadKey();

        }
    }

    //    "Guid":"40",
    //"Index":0,
    //"Title":"北侧2排电脑3",
    //"subTitle":"",
    //"Type":"32",
    //"IsLeaf":true,
    //"GroupName":"",
    //"Children":[
    //],
    //"UserParam":"2"

    class JosnUnit
    {
        public string Guid { get; set; }
        public string Index { get; set; }
        public string Title { get; set; }
        public string subTitle { get; set; }
        public string Type { get; set; }
        public string IsLeaf { get; set; }
        public string GroupName { get; set; }
        public string[] Children { get; set; }
        public string UserParam { get; set; }

    }
}

public class SignalModel
    {
        public string Guid { get; set; }
        public int Index { get; set; }
        public string Title { get; set; }
        public string subTitle { get; set; }
        public string Type { get; set; }
        public string GroupName { get; set; }
        public string Children { get; set; }
        public int UserParam { get; set; }

    }

 static void Main(string[] args)
        {
            List<SignalModel> pResult = new List<SignalModel>();
            string path = AppDomain.CurrentDomain.BaseDirectory + "\\信号源列表.txt";
            StreamReader streamReader = new StreamReader(path);
             var str=streamReader.ReadToEnd();
             streamReader.Dispose();
              str = str.Remove(str.Length - 1, 1);//删除结尾字符‘]’
                str = str.Remove(0, 1);//删除开头字符‘[’
                if (!string.IsNullOrEmpty(str) && str.Contains("subTitle"))
                {
　　　　　　　　　　　　//去掉字符串中的‘[]’
                    str = str.Replace("[", "\"");
                    str = str.Replace("]", "\"");
                    str = "[" + str + "]";//首尾添加上‘[]’
                    List<SignalModel> modelList = JsonConvert.DeserializeObject<List<SignalModel>>(str);
                    pResult = modelList;
                }
            Console.ReadKey();

        }