dynamic data = new System.Dynamic.ExpandoObject();

                IDictionary<string, object> dictionary = (IDictionary<string, object>)data;

                dictionary.Add("FirstName", "Bob");

                dictionary.Add("LastName", "Smith");

                dictionary.Add("Arry_01", new List<object>());

                dynamic data1 =  new System.Dynamic.ExpandoObject();

                ((IDictionary<string, object>)data1).Add("AAA","=101");

                ((IDictionary<string, object>)data1).Add("BBB","=101");

                data.Arry_01.Add(data1);

        private void button1_Click(object sender, EventArgs e)

        {

            dynamic expando = new ExpandoObject();

            expando.Name = "Brian";

            expando.Country = "USA";

            // Add properties dynamically to expando

            AddProperty(expando, "Language", "English");

            // Add a LanguageChanged event and predefined event handler

            AddEvent(expando, "LanguageChanged", eventHandler);
　　　　}

  public static void AddProperty(ExpandoObject expando, string propertyName, object propertyValue)

        {

            //扩展对象支持IDictionary，因此我们可以像这样扩展它

            var expandoDict = expando as IDictionary<string, object>;

            if (expandoDict.ContainsKey(propertyName)) //是否包含该属性

                expandoDict[propertyName] = propertyValue;

            else

                expandoDict.Add(propertyName, propertyValue);

        }

        public static void AddEvent(ExpandoObject expando, string eventName, Action<object, EventArgs> handler)

        {

            var expandoDict = expando as IDictionary<string, object>;

            if (expandoDict.ContainsKey(eventName))

                expandoDict[eventName] = handler;

            else

                expandoDict.Add(eventName, handler);

        }

        public event Action<object, EventArgs> eventHandler;