问C# - Json.NET Config？

EN

 public sealed class ConfigFile : Dictionary<string, object>
    {
        public string FileName { get; private set; }

        public ConfigFile(string fileName)
        {
            this.FileName = fileName;

            this.Load();
        }

        private void Load()
        {
            string contents = File.ReadAllText(this.FileName);

            JsonTextReader reader = new JsonTextReader(new StringReader(contents));

            string lastKey = "";

            while (reader.Read())
            {
                if (reader.TokenType == JsonToken.PropertyName)
                {
                    lastKey = reader.Value.ToString();
                }
                else
                {
                    if (this.ContainsKey(lastKey))
                    {
                        continue;
                    }

                    this.Add(lastKey, reader.Value);
                }
            }
        }