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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;        //Èô²»³õʼ»¯b»á²úÉú±àÒëʱ´íÎó¡£Ê¹ÓÃδ³õʼ»¯±äÁ¿
            int b = 1;      //¼´Ê¹²»³õʼ»¯bҲûÓÐÎÊÌ⣻
            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;             //Èô´Ë´¦²»½øÐгõʼ»¯£¬Ôòtry to print bÕâ¸öÓï¾äÎÞ·¨Ö´ÐÐ
            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;        //ÈôÔÚ·½·¨ÄÚ²»¶Ôb¸³Öµ£¬Ôò»á³öÏÖ±àÒëʱ´íÎóÌáÐѱØÐë¶Ôb¸³Öµ
        &


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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Value_Ref_test1
{
class Program
{
static void Main(string[] args)
{
point a = new point (10,10) ;
point b = a;
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