private string FuncWithParameters(int param1, String param2, List<string> param3)

        {

            // 我们在这里改变参数值

            param1 = ;

            param2 = "hello";

            param3.Add("sfs");

            return "thank you for reading me";

        }

        public void Test()

        {

            int intValue = ;

            String strParam = "hi";

            List<string> list = new List<string>();

            list.Add("Item1");

            FuncWithParameters(intValue, strParam, list);

            Console.WriteLine("param1: " + intValue);

            Console.WriteLine("param2: " + strParam);

            Console.WriteLine("list count: " + list.Count);

            Console.ReadLine();

        }