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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="Pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache">
<meta http-equiv="Expires" content="0">
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¡¡¡¡byte[] array = new byte[2];
¡¡¡¡array = System.Text.Encoding.Default.GetBytes("°¡");
int i1 = (short)(array[0] - ''\0'');
¡¡¡¡int i2 = (short)(array[1] - ''\0'');
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¡¡¡¡array = System.Text.Encoding.Unicode.GetBytes("°¡");
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2.ÔÚ  readonly ºÍ const Ö®¼ä£¬ÓÅÏÈʹÓà readonly
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using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace PortScanner
{
class Program
{
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¡¡internal static int scannedCount = 0;
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