先贴代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Ref_and_Out_test
{
class Program
{
static void Main(string[] args)
{
int a =0; //若不初始化b会产生编译时错误。使用未初始化变量
int b = 1; //即使不初始化b也没有问题；
RefAndOut(ref a,out b);
Console.WriteLine("after RefAndOut method process");
Console.WriteLine("a={0},b={1}", a, b);
}
static void RefAndOut(ref int a,out int b)
{
//b = 1; //若此处不进行初始化，则try to print b这个语句无法执行
Console.WriteLine("before change ref a=0 and out b =1 value");
//try to print b:Console.WriteLine("a={0},b={1}", a, b);
Console.WriteLine("Now change the value,a to 123 ,b to 999");
a = 123;
b = 999; //若在方法内不对b赋值，则会出现编译时错误提醒必须对b赋值
&
1
<asp:UpdatePanelID="UpdatePanel1"
UpdateMode="Conditional"
runat="server">
<ContentTemplate>
<asp:Button ID="Button1"
......
