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    private void SetPageNoCache()
        {
            Response.Buffer = true;
            Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1);
            Response.Expires = 0;
            Response.CacheControl = "no-cache";
            Response.AddHeader("Pragma", "No-Cache");
        }
    (1)   Response.Buffer = true;
            Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1);
            Response.Expires = 0;
            Response.CacheControl = "no-cache";
            Response.AddHeader("Pragma", "No-Cache");
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<meta http-equiv="Cache-Control" content="no-cache">
<meta http-equiv="Expires" content="0">
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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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ʹÓà PlaySound ÔÚÒÆ¶¯É豸Éϲ¥·ÅÉùÒôÎļþ¡£´Ë´úÂëʹÓà System.Runtime.InteropServices
µ÷Óà Compact Framework µÄ CoreDll.DLL µÄ PlaySound ·½·¨
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        private enum Flags
        {
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