Find application using port

I have a networking program setup that does a lot of what the nestat program does. I am working now on netstat -o. That command will give me the PID of the program using that socket. I have some idea of where to look. I have been trying开发者_JAVA百科 to use WMI to get that information but so far I have not found a suitable class.

How can I find the PID or application name that is using a particular socket?

I am using c#

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AFAIK, this information is not exposed anywhere in the BCL or WMI. You'll need to p/Invoke GetExtendedTcpTable to get it.

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Go here http://www.codeproject.com/KB/IP/iphlpapi2.aspx I have used it and it works really well.