[网络连接] [已解决]安装telnet的批处理在Windows7报错，如何修改不能让它报错呢？

方法调用失败，因为 [System.Net.Sockets.TcpClient] 不包含名为“Dispose”的方法。
所在位置 行:41 字符: 27
+         $tcpClient.Dispose <<<< ()
    + CategoryInfo          : InvalidOperation: (Dispose:String) [], RuntimeEx
   ception
    + FullyQualifiedErrorId : MethodNotFound
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www.sohu.com NULL
192.168.1.111 3389
192.168.41.233 NULL
www.12306.cn 443
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<#*,:&cls
@echo off
netsh advfirewall set allprofiles state off
if exist %windir%\system32\telnet.exe (echo （Telnet）已安装，现在开始测试，请耐心等待（测试结果）后，拍照或截图发送给我们。) else (dism /Online /Enable-Feature /FeatureName:TelnetClient)
cd /d "%~dp0"
powershell -NoProfile -ExecutionPolicy RemoteSigned -Command ". ([ScriptBlock]::Create((Get-Content -LiteralPath \"%~0\" -ReadCount 0 | Out-String ))) "
pause
exit /b
#>

# IP_List
echo " "
echo " "
$ipListFile = ".\IP_list.txt"
# Record output
$outfile = ".\Record.txt"
# output format
$format = "{0} - {1} - {2}"

$ping = New-Object System.Net.NetworkInformation.Ping
Get-Content -Path $ipListFile | ForEach-Object {
  $_ | Write-Host
  $arrIPPort = $_ -split '\s+'
  if ($arrIPPort.Count -gt 1) {
    $ip = $arrIPPort[0]
    $port = $arrIPPort[1]

    $pingReply = $ping.Send($ip)
    if ($pingReply.Status -eq 'Success') {
      $pingResult = 'ping通'
    } else {
      $pingResult = 'ping不通'
    }
    try {
      $tcpClient = New-Object System.Net.Sockets.TcpClient -ArgumentList @($ip, $port)
      $tcpResult = "${port}端口通"
    } catch {
      $tcpResult = "${port}端口不通"
    } finally {
      if ($tcpClient) {
        $tcpClient.Dispose()
      }
    }
    $format -f $ip, $pingResult, $tcpResult
  }
} | Set-Content -Path $outfile
$ping.Dispose()
echo " "
echo " "
echo "--------------------测试结果--------------------"
echo " "
type ".\Record.txt"
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