Creating a Port Scanner in C#

Creating a Port Scanner in C#/List all occupied ports in a System



     IPGlobalProperties gp=System.Net.NetworkInformation.IPGlobalProperties.GetIPGlobalProperties();
            Console.WriteLine("Computer Name={0}",gp.HostName);

            Console.WriteLine("TCP Active Listeners");
            foreach (IPEndPoint ipe in gp.GetActiveTcpListeners())
            {
                Console.WriteLine(ipe.Address+"\t\t"+ipe.AddressFamily+"\t\t"+ipe.Port);
            }
OUTPUT

List Active Tcp Active Connections  using C#

            IPGlobalProperties gp=System.Net.NetworkInformation.IPGlobalProperties.GetIPGlobalProperties();

            Console.WriteLine("Computer Name={0}",gp.HostName);

            Console.WriteLine("TCP Active TCP Connections");

            foreach(TcpConnectionInformation tci in gp.GetActiveTcpConnections())

            {

                Console.WriteLine(tci.LocalEndPoint.Address + "\t\t" + tci.LocalEndPoint.AddressFamily + "\t\t" + tci.LocalEndPoint.Port);

            }

OUTPUT