C#动态创建对象和其属性

　　　　　　  dynamic contact = new ExpandoObject();
            contact.Name = "Patrick Hines";
            contact.Phone = "206-555-0144";
            contact.Address = new ExpandoObject();
            contact.Address.Street = "123 Main St";
            contact.Address.City = "Mercer Island";
            contact.Address.State = "WA";
            contact.Address.Postal = "68402";
            string res = JsonConvert.SerializeObject(contact);