C#json转换成字典类型

 string  ProductDetails = "{\"size\":\"10\", \"weight\":\"10kg\"}";
            Dictionary<string, string> ProductDetailList=  JsonConvert.DeserializeObject<Dictionary<string, string>>(ProductDetails);
            foreach (var item in ProductDetailList)
            {
                Console.WriteLine(item.Key + " " + item.Value);
            }
 string  ProductDetails = "{\"size\":\"10\"