Json文件与C#字典读写转换

1.C# 字典读取Json文件：

Dictionary<string, Dictionary<string, float>> Dic_Infos = new Dictionary<string, Dictionary<string, float>>();

string path = @"D:Infos.json";

private void ReadJson()
{ 
    StreamReader SR = File.OpenText(path);
    JsonTextReader JTR = new JsonTextReader(SR);
    JToken JTokens = JToken.ReadFrom(JTR);
    int num = JTokens.Count();
    if (num>0)
    {
        JToken first = JTokens.First();

        for (int i = 0; i < num; i++)
        {
            string Name = first.Path.Substring(2, first.Path.Length - 4);

            string Info = first.First().ToString();
            Dictionary<string, float> Dic_Info = JsonConvert.DeserializeObject<Dictionary<string, float>>(Info);
            if (!Dic_Infos.ContainsKey(Name))
            {
                Dic_Infos.Add(Name, Dic_Info);
            }
            first = first.Next;
        }
    } 
}

2.C# 字典写入Json文件：

private void WriteJson()
{  
    string Json = "{";
    foreach (var item in Dic_Infos)
    {
        Json += """ + item.Key + "":{";
        foreach (var items in item.Value)
        {
            Json += """ + items.Key + "":" + """ + items.Value + "",";
        }
        Json += "},";
    }
    Json += "}";

    JToken JToken = (JToken)JsonConvert.DeserializeObject(Json);
    string output = Newtonsoft.Json.JsonConvert.SerializeObject(JToken, Newtonsoft.Json.Formatting.Indented);
    File.WriteAllText(path, output); 
}