Find application using port

Question

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 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#

Answer 1

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