.net event 使用 Action

Action<string> methodCall = (x) => { x += "haha"; MessageBox.Show(x); };        public event Action<string> BoilerEventLog;        private void button2_Click(object sender, EventArgs e)        {            BoilerEventLog += new Action<string>(methodCall);            BoilerEventLog("123");        }

其实很好理解，Func和Action还有Predicate本质就是委托。

Func和Action大同小异，就不赘述了。