How to check if a TCP port is available for listening

This sample code shows how to check if a TCP port is available for listening on the local computer.

	using System.Linq;
	using System.Net;
	using System.Net.NetworkInformation;
	public bool TcpPortIsAvailableForListening(int port)
	{
	IPGlobalProperties ipGlobalProperties = IPGlobalProperties.GetIPGlobalProperties();
	IPEndPoint[] tcpEndPointArray = ipGlobalProperties.GetActiveTcpListeners();
	var isUnavailable = tcpEndPointArray.Any(endPoint => endPoint.Port == port);
	return !isUnavailable;
	}

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