public void method(Action action){    //2.method执行中    try    {        action(); //3.调用委托        string x = "5"; //如果action执行时出现了error,但是内部有catch机制并且没有继续throw出来，那么这里"会"执行    }    catch (Exception ex)    {        //8.捕获error        string x = ex.Message; //如果action执行时出现了error,但是内部有catch机制并且没有继续throw出来，那么这里"不会"执行    }}protected void Page_Load(object sender, EventArgs e){    try    {        //1.调用method函数，并且传入委托        method(delegate()        {            //4.执行委托函数            try            {                throw new Exception("x"); //5.error 出现             }            catch (Exception ex)            {                string x = ex.Message; //6.捕获error                 throw ex; //7.把error传递下去 (如果没有把error传递,那么外部的catch就不会触发了)            }        });        string xyx = "z"; //9.因为method函数中的catch没有在throw所以会执行这里    }    catch (Exception ex)    {        string x = ex.Message;    }    finally    {         //10 finally 一定会执行!    }}

public class MyEx : System.Exception{           public MyEx() : base() { }          public MyEx(string message, Exception innerException) : base(message, innerException) { }    public MyEx(Int64 number) //初始化    {        this.number = number;    }    public Int64 number { get; set; }}  protected void Page_Load(object sender, EventArgs e){    try    {        throw new MyEx(5);    }    catch (MyEx ex)    {        Int64 z = ex.number; //调用公有属性    }    catch (Exception ex)    {        string x = ex.Message;    }    finally    {         //10 finally 一定会执行!    }}