C＃JSON自定义序列化

首先，我建议使用newton json dll。

其次，您需要为KeyValuePair
创建自定义JsonConverter，如下所示：

  public class PairConverter : JsonConverter  {    public override bool CanConvert(Type objectType)    {       return objectType == typeof(KeyValuePair<string, int>);    }    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)    {      throw new NotImplementedException();    }    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)    {      var item = (KeyValuePair<string, int>)value;      writer.Writevalue(item.Value);      writer.Flush();    }  }

然后像这样为“年龄”属性添加JsonConverter属性：

 public class Persons {   [JsonConverter(typeof(PairConverter))]   public KeyValuePair<string, int> Age { get; set; } }

最后，用法示例：

 var persons = new Persons() {    Age = new KeyValuePair<string, int>("Age", 10) }; var json = JsonConvert.SerializeObject(persons); // {Age:10}