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POList used TCP port using C#
 

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    <p>This is the answer to my questions.</p> <p>How to list binded/used TCP port in C#. Used modified code from <a href="https://stackoverflow.com/questions/570098/in-c-how-to-check-if-a-tcp-port-is-available/570461#570461">jro</a> </p> <pre><code> static void ListUsedTCPPort(ref ArrayList usedPort) { IPGlobalProperties ipGlobalProperties = IPGlobalProperties.GetIPGlobalProperties(); IPEndPoint[] tcpConnInfoArray = ipGlobalProperties.GetActiveTcpListeners(); IEnumerator myEnum = tcpConnInfoArray.GetEnumerator(); while (myEnum.MoveNext()) { IPEndPoint TCPInfo = (IPEndPoint)myEnum.Current; usedPort.Add(TCPInfo.Port); } } </code></pre> <p><strong>Original questions.</strong> This is how i list TCP port using C#. It is modified code i found in this forum(forgot exactly where i got it. If you are the original developer, notify me and ill put credits where due.)</p> <pre><code> //List used tcp port static void ListUsedTCPPort(ref ArrayList usedPort) { IPGlobalProperties ipGlobalProperties = IPGlobalProperties.GetIPGlobalProperties(); TcpConnectionInformation[] tcpConnInfoArray = ipGlobalProperties.GetActiveTcpConnections(); IEnumerator myEnum = tcpConnInfoArray.GetEnumerator(); while (myEnum.MoveNext()) { TcpConnectionInformation TCPInfo = (TcpConnectionInformation)myEnum.Current; usedPort.Add(TCPInfo.LocalEndPoint.Port); } } </code></pre> <p>Problem is, the results is different from used tcp port listed in TCPview(Protocol-TCP, Local port). By the way, i do know that this list used TCP port at the EXACT time its called. What did i did wrong?</p>
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    1. USSyaiful Nizam Yahya
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    1. COWhy the name of function is 'ListAvailableTCPPort' when it returns used ports ? and providing two different list from both of them will help to find the problem source.
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    2. COYou were right. I should have named it ListUsedTCPPort. Something must got into my head while im writing it. Renaming it now.
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      1. USSyaiful Nizam Yahya
 

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