static void Main(string[] args) { difclass obj = new difclass(); Console.WriteLine("value is {0}", obj.value); //自动选择了适合参数类型的重载函数 ModifyValue(obj.value); Console.WriteLine("value2 is {0}", obj.value); ModifyValue(obj); Console.WriteLine(obj.value); obj.Addm(); obj.dispva(); //Console.WriteLine(); Console.ReadKey(); }