c#创建对象并动态添加属性

 //动态类，可以作为基类被继承
 dynamic backObj = new ExpandoObject();  //ExpandoObject 为密封类
                 backObj.image0 = IMGNAMELIST0;
                 backObj.image1 = IMGNAMELIST1;
                 backObj.asset = ASSET;
                 backObj.indexData = (dsIndex!=null)?dsIndex.Tables[]:null;

                 return new StringRespond()
                 {
                     RespondSuc = true,
                     RespondString = JsonConvert.SerializeObject(backObj)
                 };