public void ShowResult(DelGetResult del) { if (del != null) { del(10); } else { Console.WriteLine("委托为空"); } }
static void Main(string[] args) { /*Tool tool = new Tool(); * tool.ShowResultSum(); * tool.ShowResultMinus();*/ Tool tool = new Tool(); DelGetResult del = null; /*DelGetResult del = tool.ShowResultMinus; * del += tool.ShowResultSum;*/ tool.ShowResult(del); Console.ReadKey(); }